I'd like you to work on a larger feature: support for occam #include module directives, specifically allowing programs that #include "course" to use the "course module". The module's source code is in the separate project "kroc" which is cloned in the kroc subdirectory of this project so we can access its files. For example the source for "course" is at ./kroc/modules/course . The idea is to implement this module support by means of direct textural include by the transpiler. However there is an extra complication which is that occam modules are not simply defined by the set of files in a directory. Rather the files that comprise a given module/library are defined in Python files named SConscript. These files may be present in subdirectories, with the "root" SConscript file having Python code that performs a recursive descent into the subdirectories. You can see the files in the course module directory tree for example. There is a tool used by the kroc project named occbuild. Its source can be found at ./kroc/site_scons/site_tools/occbuild.py. Therefor the complete feature inplementation requires: being able to process the SConscript files such as to generate a corresponding .module file that has #INCLUDE directives for all the relevant library source files, and implementing the #INCLUDE directive itself. In addition it will be necessary to implement the preprocessor directives (#IF NOT (DEFINED ...), #DEFINE, #ENDIF) which are used to prevent including the same file multiple times. I suggest you tackle each of these sub-features in turn rather than trying to implement everything at once.
I'll start by exploring the relevant files to understand the structure before planning the implementation.
Entered plan mode. You should now focus on exploring the codebase and designing an implementation approach. In plan mode, you should: 1. Thoroughly explore the codebase to understand existing patterns 2. Identify similar features and architectural approaches 3. Consider multiple approaches and their trade-offs 4. Use AskUserQuestion if you need to clarify the approach 5. Design a concrete implementation strategy 6. When ready, use ExitPlanMode to present your plan for approval Remember: DO NOT write or edit any files yet. This is a read-only exploration and planning phase.
{
"subagent_type": "Explore",
"prompt": "Explore the kroc/modules/course directory structure thoroughly. I need to understand:\n1. What files exist in the course module directory and subdirectories\n2. The content of all SConscript files in the course module tree\n3. The content of the actual occam source files (.occ files) that make up the course module\n4. Any .inc files or header files\n\nUse glob patterns to find all files, then read the SConscript files and a sample of the .occ/.inc files. Be very thorough - read all SConscript files you find."
}{
"subagent_type": "Explore",
"prompt": "Read the file ./kroc/site_scons/site_tools/occbuild.py thoroughly. I need to understand:\n1. How it processes SConscript files\n2. How it determines which source files belong to a module/library\n3. What functions/methods are relevant to building occam libraries\n4. How it handles includes and dependencies\n\nRead the entire file and summarize the key mechanisms for determining module composition."
}{
"subagent_type": "Explore",
"prompt": "Explore the current occam2go transpiler to understand:\n1. How the lexer handles preprocessor-like directives (search for # or INCLUDE or DEFINE in token.go, lexer.go)\n2. How main.go wires the pipeline together (read the full file)\n3. The current token types defined in lexer/token.go\n4. How the parser starts processing (the entry point in parser.go - read the first ~100 lines and the parseProgram/parseStatement functions)\n\nBe thorough - read main.go fully, token.go fully, and the relevant sections of lexer.go and parser.go."
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"text": "Now I have a complete understanding of the occbuild.py file. Let me provide you with a comprehensive summary:\n\n## Key Mechanisms in occbuild.py\n\n### 1. **SConscript File Processing**\n\nThe file doesn't directly process SConscript files, but rather **provides SCons builders and configuration** that SConscript files use. The build system is structured around three main builder types:\n\n- **OccamObject** (`tce_bld`) - Compiles `.occ` source files to `.tce` intermediate format\n- **OccamLibrary** (`lib_bld`) - Creates `.lib` library files from `.tce` files\n- **OccamProgram** (`prog_bld`) - Creates executable programs from `.occ` and/or `.tce` files\n\n### 2. **Module/Library Composition Determination**\n\nThe key mechanism is the **`occbuild_library_emitter` function** (lines 58-67):\n\n```python\ndef occbuild_library_emitter(target, source, env):\n target_name = str(target[0])\n precomp = target_name.replace(target[0].suffix, '.precomp')\n module = target_name.replace(target[0].suffix, '.module')\n if len(source) != 0:\n # No precomp is generated if there are no sources, ie a 'meta' library.\n target.append(precomp)\n target.append(module)\n return (target, source)\n```\n\n**What this does:**\n- For each library built, it determines what outputs are generated\n- If `source` files exist: generates both `.precomp` (precompiled library) and `.module` files\n- If `source` is empty (meta library): generates only `.module` file\n- **The source files passed to the builder define module composition** — whatever `.tce` files are in `$SOURCES` become part of that library\n\n### 3. **Relevant Functions/Methods for Building Occam Libraries**\n\n**Builder Configuration:**\n- `OccamLibrary` - Main builder for creating libraries from `.tce` sources\n- Command: `$OCCBUILDLIBRARYCOM` = `$OCCBUILD $_OCCBUILD_TOOLCHAIN $_OCCBUILD_SEARCH_DIRS $OCCBUILDFLAGS --library $TARGET $SOURCES`\n\n**Library Dependency Management:**\n- `OccLibDepend(self, node, lib_name)` (lines 119-125) - Method added to environment for declaring library dependencies\n - Adds explicit dependency on library's `.dep` file\n - Appends library include paths to `INCPATH` if available\n - Used as: `env.OccLibDepend(target, ['lib_name'])`\n\n**Environment Variables:**\n- `OCCLIBS` - Dictionary storing library metadata with keys like `'dep'` and `'inc'`\n- `INCPATH` - Include search paths (accumulated as libraries are added)\n- `OCCBUILDFLAGS` - Compilation flags\n\n### 4. **Include and Dependency Handling**\n\n**Dependency Scanner (lines 25-40):**\n```python\ndef pideps_scan(node, env, path):\n defines = {}\n binaries = []\n deps = {}\n path = [os.path.abspath(d.path) for d in path]\n pideps.parse(node.path, deps, path, binaries, defines)\n deplines = deps.keys()\n deplines = [l.split(' ')[1].split(' ') for l in deplines]\n deplines = reduce(lambda x, y: x + y, deplines, [])\n deplines = [os.path.abspath(x) for x in deplines]\n return deplines\n```\n\nThis scans `.occ` files for dependencies using the `pideps` module. However, **it's disabled** (commented out on line 82-83):\n```python\n# FIXME: The source scanner does not work well enough yet :/\n#source_scanner = pideps_scanner)\n```\n\n**Search Path Mechanism:**\n- `_OCCBUILD_SEARCH_DIRS` - Generated from `INCPATH` environment variable using `--search` prefix\n- Passed to `$OCCBUILD` command to locate includes and dependencies\n- Built via `_concat()` using `RDirs` (recursive directory expansion)\n\n**Monkeypatching for Dependencies (lines 10-19):**\n```python\npideps.sourceprefix = \"\"\npideps.die = pideps.warn\ndef find_dep(fn, dep, incpath):\n for dir in [os.path.dirname(fn)] + incpath:\n dpath = os.path.normpath(os.path.join(dir, dep))\n if os.access(dpath, os.F_OK):\n return dpath\n return os.path.join(os.path.dirname(fn), dep)\npideps.find_dep = find_dep\n```\n\nThis customizes the `pideps` module to search for dependencies relative to the source file's directory first, then in the include path.\n\n### 5. **Module Composition Summary**\n\n**How a module's contents are determined:**\n\n1. **Explicit source list** - Each SConscript uses `env.OccamLibrary(target='libname.lib', source=['file1.tce', 'file2.tce', ...])`\n2. **Source files must be `.tce` intermediate format** - They're compiled from `.occ` using the `tce_bld` builder first\n3. **The `source` parameter in the builder call is the definitive list** of what gets compiled into a library\n4. **Meta libraries** - Can be created with empty source list (generates only `.module`, no `.precomp`)\n5. **Dependencies** - Managed explicitly via `env.OccLibDepend()` calls, not automatically scanned (scanner is disabled)\n\n### 6. **Critical Build Command Structure**\n\n```\n.occ files → OccamObject builder → .tce files\n.tce files → OccamLibrary builder → .lib (+ .precomp + .module)\n.occ/.tce files → OccamProgram builder → executable\n```\n\nThe library builder chains: source files → compiled objects → final library output"
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"text": "agentId: af53388 (for resuming to continue this agent's work if needed)\n<usage>total_tokens: 18463\ntool_uses: 1\nduration_ms: 17807</usage>"
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"text": "Excellent! Now I have a comprehensive understanding. Let me create a thorough summary document:\n\n## Exploration Summary: occam2go Transpiler\n\nI've completed a thorough exploration of the occam2go transpiler. Here are my findings:\n\n### 1. Preprocessor-like Directives\n\n**Key Finding**: The lexer/parser currently does **NOT** handle preprocessor directives like `#include`, `#define`, or similar constructs. \n\nSearch results for `#`, `INCLUDE`, `DEFINE` in the codebase returned no token types or lexer/parser handling for these features. The transpiler is a straightforward single-pass compiler without a preprocessing stage.\n\n### 2. Main.go Pipeline Wiring\n\n**File**: `/home/david/projects/codeassociates/occam2go/main.go` (78 lines)\n\nThe main.go implements a clean 4-stage pipeline:\n\n```\nInput File → Lexer → Parser → Codegen → Output File\n```\n\n**Stage 1 - Lexer** (line 49):\n- `lexer.New(string(input))` creates a lexer from input file content\n- Returns `*lexer.Lexer` with tokenization ready\n\n**Stage 2 - Parser** (lines 52-61):\n- `parser.New(l)` wraps the lexer\n- `p.ParseProgram()` returns `*ast.Program` \n- Error checking: if `len(p.Errors()) > 0`, exit with error messages\n- Errors printed to stderr\n\n**Stage 3 - Codegen** (lines 64-65):\n- `codegen.New()` creates a generator\n- `gen.Generate(program)` returns Go code string\n\n**Stage 4 - Output** (lines 68-76):\n- Flag `-o output.go` writes to file, or stdout if omitted\n- Flag `-version` prints version and exits\n\n### 3. Current Token Types (lexer/token.go)\n\n**87 token types total**, organized into categories:\n\n**Special Tokens** (5):\n- `ILLEGAL`, `EOF`, `NEWLINE`, `INDENT`, `DEDENT`\n\n**Literals** (3):\n- `IDENT`, `INT`, `STRING`\n\n**Operators** (20):\n- Arithmetic: `PLUS`, `MINUS`, `MULTIPLY`, `DIVIDE`, `MODULO`\n- Comparison: `EQ`, `NEQ`, `LT`, `GT`, `LE`, `GE`\n- Channel: `SEND` (`!`), `RECEIVE` (`?`)\n- Bitwise: `BITAND` (`/\\`), `BITOR` (`\\/`), `BITXOR` (`><`), `BITNOT` (`~`), `LSHIFT` (`<<`), `RSHIFT` (`>>`)\n- Other: `ASSIGN` (`:=`), `AMPERSAND` (`&` for guard separator)\n\n**Delimiters** (7):\n- `LPAREN`, `RPAREN`, `LBRACKET`, `RBRACKET`, `COMMA`, `COLON`, `SEMICOLON`\n\n**Keywords** (40):\n- Control flow: `SEQ`, `PAR`, `ALT`, `IF`, `CASE`, `ELSE`, `WHILE`, `FOR`\n- Procedures: `PROC`, `FUNC`, `FUNCTION`, `VALOF`, `RESULT`, `IS`\n- Types: `INT_TYPE`, `BYTE_TYPE`, `BOOL_TYPE`, `REAL_TYPE`, `REAL32_TYPE`, `REAL64_TYPE`\n- Channels: `CHAN`, `OF`\n- Logic: `TRUE`, `FALSE`, `NOT`, `AND`, `OR`\n- Other: `SKIP`, `STOP`, `TIMER`, `AFTER`, `VAL`, `PROTOCOL`, `RECORD`\n\n### 4. Parser Entry Point and Processing\n\n**File**: `/home/david/projects/codeassociates/occam2go/parser/parser.go` (2045 lines)\n\n**Parser Initialization** (lines 70-84):\n```go\nfunc New(l *lexer.Lexer) *Parser {\n p := &Parser{\n l: l,\n errors: []string{},\n timerNames: make(map[string]bool),\n protocolNames: make(map[string]bool),\n protocolDefs: make(map[string]*ast.ProtocolDecl),\n recordNames: make(map[string]bool),\n recordDefs: make(map[string]*ast.RecordDecl),\n }\n // Initialize with two token lookahead\n p.nextToken()\n p.nextToken()\n return p\n}\n```\n\n**ParseProgram** (lines 138-150):\n- Entry point for parsing entire program\n- Loops through tokens until EOF\n- For each token, calls `parseStatement()`\n- Collects statements in `program.Statements` slice\n- Returns `*ast.Program`\n\n**parseStatement Switch** (lines 153-221):\nDispatches based on current token type:\n\n| Token | Handler | Purpose |\n|-------|---------|---------|\n| `INT_TYPE` / `BYTE_TYPE` / `REAL_TYPE`, etc. | `parseFuncDecl()` or `parseVarDecl()` | Type declarations or function with type prefix |\n| `LBRACKET` | `parseArrayDecl()` | Array or channel array declarations |\n| `CHAN` | `parseChanDecl()` | Channel declarations |\n| `PROTOCOL` | `parseProtocolDecl()` | Protocol definitions (simple/sequential/variant) |\n| `RECORD` | `parseRecordDecl()` | Record type definitions |\n| `TIMER` | `parseTimerDecl()` | Timer declarations |\n| `SEQ` | `parseSeqBlock()` | Sequential block |\n| `PAR` | `parseParBlock()` | Parallel block |\n| `ALT` | `parseAltBlock()` | Alternation block |\n| `SKIP` | Returns `&ast.Skip{}` | No-op |\n| `STOP` | Returns `&ast.Stop{}` | Stop process |\n| `PROC` | `parseProcDecl()` | Procedure declaration |\n| `WHILE` | `parseWhileLoop()` | While loop |\n| `IF` | `parseIfStatement()` | Conditional |\n| `CASE` | `parseCaseStatement()` | Case/switch |\n| `IDENT` | Complex dispatch | Assignment, send, receive, indexed ops, or proc call |\n| `INDENT` / `DEDENT` / `EOF` | Returns `nil` | Block markers and end of input |\n\n**IDENT Token Processing** (lines 193-214):\nSpecial handling for identifiers:\n1. Check if record typename + var name → `parseRecordVarDecl()`\n2. Check if followed by `[` → `parseIndexedOperation()` (handles indexed assignments, sends, receives)\n3. Check if followed by `:=` → `parseAssignment()`\n4. Check if followed by `!` → `parseSend()`\n5. Check if followed by `?` → distinguish timer read vs channel receive via `timerNames` map\n6. Otherwise → `parseProcCall()`\n\n### 5. Key Architectural Patterns\n\n**Indentation Tracking** (lexer/lexer.go):\n- `indentStack` maintains indentation levels\n- 2 spaces = 1 indent level\n- Tabs treated as 2 spaces\n- `INDENT` token generated when indentation increases\n- `DEDENT` token(s) generated when indentation decreases\n- Multiple DEDENTs queued in `pendingTokens` if necessary\n\n**Two-Token Lookahead**:\n- Parser maintains `curToken` and `peekToken`\n- `nextToken()` advances both\n- Enables easy lookahead patterns (e.g., `IDENT` followed by `[` or `:=`)\n\n**Two-Pass Code Generation** (codegen/codegen.go, 1316 lines):\n- **Pass 1** (lines 63-91): Scan AST for:\n - Procedure signatures (for reference param handling)\n - Protocol definitions\n - Record definitions\n - Required imports (sync, fmt, time, os)\n - Channel-to-protocol mappings\n- **Pass 2** (lines 93-156): Generate code in proper order:\n - Package declaration\n - Imports\n - Type definitions (protocols, records)\n - Procedure declarations\n - Main function with statements\n\n**Semantic Tracking**:\n- `timerNames`: Distinguishes `TIMER` reads from channel receives\n- `protocolNames` / `protocolDefs`: Track protocol definitions for variant detection\n- `recordNames` / `recordDefs`: Track record types\n- `procSigs`: Function/procedure signatures for auto-referencing\n- `refParams`: Track reference parameters per procedure\n- `chanProtocols`: Map channel names to their protocol types\n\n### 6. File Structure\n\n```\noccam2go/\n├── main.go (78 lines) - CLI entry point\n├── lexer/\n│ ├── token.go (223 lines) - Token types & keywords\n│ ├── lexer.go (343 lines) - Tokenizer with indentation\n│ └── lexer_test.go\n├── parser/\n│ ├── parser.go (2045 lines) - Recursive descent parser\n│ └── parser_test.go\n├── ast/\n│ └── ast.go (420 lines) - AST node definitions\n├── codegen/\n│ ├── codegen.go (1316 lines) - AST → Go code generator\n│ ├── codegen_test.go - Unit tests\n│ └── e2e_test.go - End-to-end tests\n└── [other files: README, TODO, scripts]\n```\n\n### 7. What's NOT Implemented\n\nNo preprocessor directives present. The transpiler expects pure Occam code as input. Advanced features not yet implemented (per TODO.md):\n- Abbreviations (`name IS expr:`)\n- `PRI ALT` / `PRI PAR` (priority variants)\n- Complex ALT guards\n- `PLACED PAR` (hardware placement)\n- `PORT OF` (hardware ports)\n\n---\n\n**Key Insight**: This is a clean, single-pass transpiler with no preprocessing stage. Input flows directly through lexer→parser→codegen with semantic information tracked in parallel hashmaps. The indentation-based tokenization (INDENT/DEDENT) is the critical innovation enabling clean parsing of Python-like syntax."
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"text": "Excellent! Now I have enough information. Let me create a comprehensive report of my findings.\n\n## Comprehensive Directory Structure Analysis: kroc/modules/course\n\nI have thoroughly explored the kroc/modules/course directory. Here is a complete summary of what exists:\n\n### Directory Structure\n\nThe course module is organized into 6 main directories:\n\n```\nkroc/modules/course/\n├── SConscript (main build file)\n├── README (overview of directories)\n├── libsrc/ (course library source files)\n├── answers/ (model answers to exercises)\n├── examples/ (example programs)\n├── exercises/ (exercise stubs)\n└── etc/ (additional course materials)\n```\n\n### 1. SCONSCRIPT Files (Build Configuration)\n\n**File 1: `/home/david/projects/codeassociates/occam2go/kroc/modules/course/SConscript`** (7 lines)\n- Imports and dispatches to three subdirectories: libsrc, answers, examples\n- Uses SCons build system to organize sub-builds\n\n**File 2: `/home/david/projects/codeassociates/occam2go/kroc/modules/course/libsrc/SConscript`** (51 lines)\n- Builds two libraries: `course.lib` and `shared_screen.lib` (with `ss.lib` alias)\n- Course library includes: utils.occ, string.occ, demo_cycles.occ, demo_nets.occ, file_in.occ, float_io.occ, random.occ\n- Shared screen library includes: shared_screen.occ\n- Sets dependencies and compiler flags\n- Includes consts.inc and shared_screen.inc header files\n- Exports libraries to OCCLIBS environment\n\n**File 3: `/home/david/projects/codeassociates/occam2go/kroc/modules/course/answers/SConscript`** (48 lines)\n- Builds 11 main programs: q1-q7, q7-adam, q7-eric, q7-fred, q7-jonathan\n- Plus 3 special programs with extra flags: q7-jonathan2, q7-nick, q7-richard\n- Each program depends on course and some on shared_screen libraries\n- Programs are built from .occ source files paired with .tce compiled files\n\n**File 4: `/home/david/projects/codeassociates/occam2go/kroc/modules/course/examples/SConscript`** (22 lines)\n- Builds 12 example programs: bar, casting, commstime, demo, double_echo, echoing, hello_raw_world, hello_seq_world, hello_world, sort_inside, sort_pump, test_utils\n- All depend on course library\n- Simple build pattern: one source .occ file per program\n\n### 2. Header/Include Files (.inc)\n\n**File 1: `/home/david/projects/codeassociates/occam2go/kroc/modules/course/libsrc/consts.inc`** (56 lines)\n- ASCII character constants: NULL, BELL, BACK, ESCAPE, DELETE\n- Special constants: FLUSH, END.OF.FILE\n- String comparison return values: string.less (-1), string.same (0), string.more (1)\n- Used by course library for output and string operations\n\n**File 2: `/home/david/projects/codeassociates/occam2go/kroc/modules/course/libsrc/shared_screen.inc`** (158 lines)\n- Complex data type definitions for shared screen control protocol\n- DATA TYPE COLOUR: byte-based color constants (default, black, red, green, yellow, blue, magenta, cyan, white, bold variants)\n- DATA TYPE COORDINATES: X/Y pair record\n- DATA TYPE COORDINATES.COLOUR: coordinates plus color\n- DATA TYPE SCREEN.NODE: batch screen instruction with tag and arguments\n- PROTOCOL SCREEN.CONTROL: variant protocol with many case tags for screen operations\n - Atomic operations: coordinates, colour, string, integer, byte, character, movement (left/right/up/down), drawing, erasing\n - Structured operations: combined position-color-text operations\n - Control: erase.screen, cursor.visible/invisible, interpret, poison\n\n### 3. Library Source Files (.occ) - libsrc/\n\nLocated in `/home/david/projects/codeassociates/occam2go/kroc/modules/course/libsrc/`:\n\n**Core Utility Library (utils.occ)** - ~1100+ lines\n- Output procedures: out.repeat, out.ch, out.string, out.byte, out.int, out.hex, out.bool, out.yes.no, flush\n- Input procedures: in.skip, in.digit, in.string, in.bool, in.byte, in.num.chars, in.int\n- Helper functions for parsing and validation: convert.byte.chars, check.num.chars, convert.num.chars\n- Interactive prompting: ask.string, ask.bool, ask.byte, ask.int\n- Screen control (VT220 protocol): cursor positioning, cursor movement, line/screen erasing, cursor visibility\n- Positioning helpers: pos.int, pos.yes.no\n- Deprecated aliases for backward compatibility\n\n**String Library (string.occ)** - Multiple procedures\n- make.string, copy.string\n- equal.string, compare.string (based on reading sample: ~200+ lines)\n- Used for string manipulation in course programs\n\n**Shared Screen Library (shared_screen.occ)** - ~100+ lines\n- fg.col: VT220 control sequences for terminal foreground colors\n- screen.interpret: interprets arrays of SCREEN.NODE commands for batch screen updates\n- Low-level terminal control operations\n\n**Additional Libraries:**\n- demo_cycles.occ - demonstration programs for cycle-based concepts\n- demo_nets.occ - demonstration programs for network-based concepts (depends on demo_cycles.tce)\n- file_in.occ - file input operations\n- float_io.occ - floating-point I/O operations\n- random.occ - random number generator (32-bit and 16-bit variants, full-period PRNG)\n- stringbuf.occ - string buffer operations\n\n### 4. Example Programs (.occ) - examples/\n\nLocated in `/home/david/projects/codeassociates/occam2go/kroc/modules/course/examples/`:\n\n**12 Example Programs:**\n1. **hello_world.occ** - Simple \"Hello World\" program using out.string\n2. **hello_seq_world.occ** - Sequential variant of hello world\n3. **hello_raw_world.occ** - Raw I/O variant\n4. **bar.occ** - Example involving bar chart or similar visualization\n5. **casting.occ** - Type casting examples\n6. **cast.occ** - Additional casting examples\n7. **commstime.occ** - Communication timing benchmark (110+ lines sample shows complex concurrent architecture with delta processes, prefix processes, timer-based measurements)\n8. **demo.occ** - Demonstration program with multiple processes (numbers, squares, fibonacci, times generators plus print.streams multiplexer)\n9. **double_echo.occ** - Echo with doubling behavior\n10. **echoing.occ** - Echo protocol example\n11. **sort_inside.occ** - Internal sorting algorithm\n12. **sort_inside_2.occ** - Alternative sorting variant\n13. **sort_pump.occ** - Pump-based sorting\n14. **sort_pump_2.occ** - Alternative pump sorting\n15. **test_utils.occ** - Testing utility functions\n16. **test_bell.occ** - Bell/BELL character testing\n\n### 5. Exercise Programs (.occ) - exercises/\n\nLocated in `/home/david/projects/codeassociates/occam2go/kroc/modules/course/exercises/`:\n\n**8 Main Exercise Templates:**\n1. **q1.occ** - \"Simple streams\" - stub with S0, S1, pause, print.stream, alternate, q1 procedures to implement\n2. **q2.occ** - Further exercises\n3. **q3.occ** - Additional challenges\n4. **q4.occ** - More complex problems\n5. **q5.occ** - Advanced stream problems\n6. **q6.occ** - Sorting-related exercises\n7. **q7.occ** - Complex concurrent programming\n8. **e1.occ** - Early exercise variant\n9. **bugs.occ** - Debugging exercise\n10. **cylons.occ** - \"Cylon\" process simulation exercise\n11. **robots-sei.occ** - Robot coordination problem\n\n**Supporting Data Files:**\n- nn_data.txt, nn_small.txt, nn_tiny.txt - neural network or test data\n- small_results.txt, small_results_sorted.txt - expected output samples\n- phils-plan.txt - Philosopher's dining problem description\n- Various .doc and .pdf files with problem descriptions: cylons.pdf, phils-plan.pdf, early-exercises.pdf, extra-exercises.pdf, more-exercises.pdf, santa-exercise.pdf\n\n### 6. Answer Programs (.occ) - answers/\n\nLocated in `/home/david/projects/codeassociates/occam2go/kroc/modules/course/answers/`:\n\n**Model Answer Programs:**\n- q1.occ through q7.occ - basic answers\n- q7-adam.occ, q7-eric.occ, q7-fred.occ, q7-jonathan.occ, q7-jonathan2.occ, q7-nick.occ, q7-richard.occ - alternative implementations\n- q6-sort.occ - sorting algorithm answer\n\nEach .occ file is paired with corresponding .tce (compiled occam) files for pre-compiled versions.\n\n### 7. Additional Materials - etc/\n\nLocated in `/home/david/projects/codeassociates/occam2go/kroc/modules/course/etc/`:\n- README - Additional documentation\n- reading.list - Recommended reading materials\n\n### Key File Statistics\n\n**Total files in course module: 116**\n\nBreakdown by type:\n- SConscript files: 4\n- .occ source files: 49\n- .inc header files: 2\n- .tce compiled files: 31 (paired with answers)\n- Configuration files (Makefile.am, configure.ac): 8\n- Documentation (README, .txt files): 6\n- Data files (.doc, .pdf, .txt data): 12+\n\n### Content Patterns & Key Features\n\n1. **Library Architecture:**\n - Course library provides I/O utilities built on standard input/output channels\n - All I/O is character-based (BYTE streams) using VT220 terminal control sequences\n - String handling uses null-terminated byte arrays (legacy occam style)\n\n2. **CSP/Concurrency Patterns:**\n - Examples demonstrate classic CSP patterns: delta processes, prefix processes, multiplexers\n - Timer-based benchmarking for communication performance\n - Concurrent process spawning with sync.WaitGroup-like synchronization\n - Channel-based communication protocols\n\n3. **Occam Language Features Demonstrated:**\n - SEQ/PAR blocks for sequential and parallel execution\n - TIMER operations for delays and benchmarking\n - WHILE loops with channel communication\n - VAL parameters for immutable values\n - Channel direction specifications (input/output only)\n - Variable declarations with type annotations\n - Procedure definitions with multiple parameters\n - AFTER timing operator on timers\n\n4. **Educational Focus:**\n - Exercises progress from simple stream operations to complex concurrent patterns\n - Stubs provided for students to complete\n - Multiple solution approaches shown in answers (different programmer implementations)\n - Example programs range from \"Hello World\" to sophisticated algorithms (commstime, sorting)\n - VT220 terminal control for interactive output\n\nAll absolute file paths are provided above in the relevant sections."
},
{
"type": "text",
"text": "agentId: af55914 (for resuming to continue this agent's work if needed)\n<usage>total_tokens: 55648\ntool_uses: 24\nduration_ms: 65805</usage>"
}
]Now I have a good understanding. Let me also look at the SConscript files more carefully to understand the pattern, and look at the actual occam source files to see how #INCLUDE and preprocessor directives are used.
Good, I have a solid understanding of the codebase. Let me now look at some specific details - the SConscript files and how occam source files use #INCLUDE and preprocessor guards.
{
"file_path": "/home/david/projects/codeassociates/occam2go/kroc/modules/course/SConscript"
} 1→import os
2→
3→dirs = Split('libsrc answers examples')
4→
5→for d in dirs:
6→ SConscript(os.path.join(d, 'SConscript'))
7→{
"file_path": "/home/david/projects/codeassociates/occam2go/kroc/modules/course/libsrc/SConscript"
} 1→Import('env')
2→local = env.Clone()
3→
4→course_lib_srcs = Split('''
5→ utils.occ
6→ string.occ
7→ demo_cycles.occ
8→ demo_nets.occ
9→ file_in.occ
10→ float_io.occ
11→ random.occ
12→ ''')
13→
14→shared_screen_lib_srcs = Split('''
15→ shared_screen.occ
16→ ''')
17→shared_screen_lib_objs = \
18→ [local.OccamObject(f, INCPATH='.') for f in shared_screen_lib_srcs]
19→
20→
21→
22→course_lib = local.OccamLibrary(
23→ 'course.lib',
24→ course_lib_srcs,
25→ INCPATH='.',
26→ OCCBUILDFLAGS='--include consts.inc')
27→
28→def mk_shared_screen(lib_name):
29→ return local.OccamLibrary(
30→ lib_name,
31→ shared_screen_lib_objs,
32→ INCPATH='.',
33→ OCCBUILDFLAGS='--need course --include shared_screen.inc')
34→
35→sharedscreen_lib = mk_shared_screen('shared_screen.lib')
36→# Build ss.lib too for backwards compatibility.
37→mk_shared_screen('ss.lib')
38→
39→# FIXME: Autodepend???
40→local.Depends('shared_screen.tce', course_lib)
41→local.Depends('demo_nets.occ', 'demo_cycles.tce')
42→local.Depends('string.occ', 'utils.tce')
43→
44→
45→env['OCCLIBS']['course'] = dict(
46→ dep=course_lib,
47→ inc=Dir('.'))
48→env['OCCLIBS']['shared_screen'] = dict(
49→ dep=sharedscreen_lib,
50→ inc=Dir('.'))
51→{
"file_path": "/home/david/projects/codeassociates/occam2go/kroc/modules/course/libsrc/consts.inc"
} 1→--
2→-- Constants
3→-- Copyright (C) 1984 P.H. Welch
4→--
5→-- This library is free software; you can redistribute it and/or
6→-- modify it under the terms of the GNU Lesser General Public
7→-- License as published by the Free Software Foundation; either
8→-- version 2 of the License, or (at your option) any later version.
9→--
10→-- This library is distributed in the hope that it will be useful,
11→-- but WITHOUT ANY WARRANTY; without even the implied warranty of
12→-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13→-- Lesser General Public License for more details.
14→--
15→-- You should have received a copy of the GNU Lesser General Public
16→-- License along with this library; if not, write to the Free Software
17→-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18→--
19→
20→--** Course library.
21→--
22→-- The course library provides various simple utilities for occam programmers.
23→--
24→-- Strings (as handled by this library) are [@code BYTE] arrays left-justified
25→-- with trailing [@ref NULL]s. It is usually preferably to use mobile byte
26→-- arrays ([@code MOBILE []BYTE]) to represent strings in modern occam-pi
27→-- programs; the string features in this library exist for backwards
28→-- compatibility.
29→--
30→-- To use this library:
31→--
32→-- [@code
33→-- #INCLUDE "course.module"]
34→--
35→-- @module course
36→
37→--*{{{ ASCII Character values.
38→VAL BYTE NULL IS 0: --* ASCII NUL
39→VAL BYTE BELL IS 7: --* ASCII BEL - terminal bell
40→VAL BYTE BACK IS 8: --* ASCII BS - backspace key
41→VAL BYTE ESCAPE IS 27: --* ASCII ESC - escape key
42→VAL BYTE DELETE IS 127: --* ASCII DEL - delete key
43→--*}}}
44→
45→--{{{ special constants
46→VAL BYTE FLUSH IS 255: --* Flush output buffer
47→VAL BYTE END.OF.FILE IS 255: --* End of file
48→--}}}
49→
50→--*{{{ COMPARE.STRING Return values from [@ref compare.string].
51→VAL INT string.less IS -1: --* Left less than right
52→VAL INT string.same IS 0: --* Left and right the same
53→VAL INT string.more IS 1: --* Left more than right
54→--*}}}
55→
56→{
"file_path": "/home/david/projects/codeassociates/occam2go/kroc/modules/course/libsrc/utils.occ",
"limit": 60
} 1→--
2→-- Utilities
3→-- Copyright (C) 1997 P.H. Welch
4→--
5→-- This library is free software; you can redistribute it and/or
6→-- modify it under the terms of the GNU Lesser General Public
7→-- License as published by the Free Software Foundation; either
8→-- version 2 of the License, or (at your option) any later version.
9→--
10→-- This library is distributed in the hope that it will be useful,
11→-- but WITHOUT ANY WARRANTY; without even the implied warranty of
12→-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13→-- Lesser General Public License for more details.
14→--
15→-- You should have received a copy of the GNU Lesser General Public
16→-- License along with this library; if not, write to the Free Software
17→-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18→--
19→
20→--** @module course
21→
22→#COMMENT "Copyright: P.H.Welch, 1997"
23→
24→#INCLUDE "consts.inc"
25→
26→--{{{ out stuff
27→--{{{ PROC out.repeat (VAL BYTE ch, VAL INT n, CHAN BYTE out!)
28→--* Write a character repeatedly to a channel.
29→-- This outputs [@code ch] down the channel [@code out] [@code n] times. If
30→-- [@code n] is negative, nothing happens.
31→-- @param ch Character
32→-- @param n Number of times to output (negative values result in no output)
33→-- @param out Channel to write to
34→PROC out.repeat (VAL BYTE ch, VAL INT n, CHAN BYTE out!)
35→ --{{{
36→ IF
37→ n > 0
38→ SEQ i = 0 FOR n
39→ out ! ch
40→ TRUE
41→ SKIP
42→ --}}}
43→:
44→--}}}
45→--{{{ PROC out.ch (VAL BYTE ch, VAL INT field, CHAN BYTE out!)
46→--* Write a character to a channel.
47→-- This outputs [@code ch] in a fieldwidth [@code field] down [@code out]. If
48→-- the fieldwidth is too wide for [@code ch], it right-justifies [@code ch]
49→-- with spaces on the left. If the field is not wide enough, it prints the
50→-- [@code ch] anyway. These rules for fieldwidth are the same as those used by
51→-- the Pascal [@text write] procedure.
52→-- @param ch Character
53→-- @param field Field width to right-justify in
54→-- @param out Channel to write to
55→PROC out.ch (VAL BYTE ch, VAL INT field, CHAN BYTE out!)
56→ --{{{
57→ SEQ
58→ out.repeat (' ', field - 1, out!)
59→ out ! ch
60→ --}}}{
"file_path": "/home/david/projects/codeassociates/occam2go/kroc/modules/course/examples/hello_world.occ"
} 1→#INCLUDE "course.module"
2→
3→PROC hello.world (CHAN BYTE keyboard?, screen!, error!)
4→ --{{{
5→ out.string ("Hello World*c*n", 0, screen!)
6→ --}}}
7→:
8→Now I can see the pattern clearly. Let me also check if there are any #IF, #DEFINE, #ENDIF usage patterns in the kroc source files.
{
"pattern": "^#(IF|DEFINE|ENDIF|INCLUDE|COMMENT)",
"path": "/home/david/projects/codeassociates/occam2go/kroc/modules/course/libsrc",
"output_mode": "content"
}kroc/modules/course/libsrc/string.occ:23:#INCLUDE "consts.inc" kroc/modules/course/libsrc/shared_screen.occ:30:#INCLUDE "consts.inc" kroc/modules/course/libsrc/shared_screen.occ:31:#INCLUDE "shared_screen.inc" kroc/modules/course/libsrc/utils.occ:22:#COMMENT "Copyright: P.H.Welch, 1997" kroc/modules/course/libsrc/utils.occ:24:#INCLUDE "consts.inc" kroc/modules/course/libsrc/random.occ:50:#IF (TARGET.BITS.PER.WORD = 32) kroc/modules/course/libsrc/random.occ:84:#ENDIF kroc/modules/course/libsrc/utils.doc:2:#COMMENT "Copyright: P.H.Welch, 1997" kroc/modules/course/libsrc/file_in.occ:22:#INCLUDE "consts.inc" kroc/modules/course/libsrc/float_io.occ:24:#COMMENT "Type conversion library V1.6 4/12/90" kroc/modules/course/libsrc/float_io.occ:25:#COMMENT "(C) Copyright INMOS limited 1988, 1990" kroc/modules/course/libsrc/float_io.occ:996:#COMMENT "Type conversion library V1.5 4/12/90" kroc/modules/course/libsrc/float_io.occ:997:#COMMENT "(c) Copyright INMOS Limited 1988, 1990" kroc/modules/course/libsrc/float_io.occ:2194:#COMMENT "Type conversion library V1.1 22/03/90" kroc/modules/course/libsrc/float_io.occ:2195:#COMMENT "(c) Copyright INMOS Limited 1988"
{
"pattern": "^#(IF|DEFINE|ENDIF|INCLUDE)",
"path": "/home/david/projects/codeassociates/occam2go/kroc/modules/course",
"output_mode": "content"
}kroc/modules/course/examples/hello_world.occ:1:#INCLUDE "course.module" kroc/modules/course/answers/q5.occ:1:#INCLUDE "course.module" kroc/modules/course/examples/demo.occ:3:#INCLUDE "course.module" kroc/modules/course/examples/echoing.occ:1:#INCLUDE "course.module" kroc/modules/course/exercises/q5.occ:91:#INCLUDE "course.module" kroc/modules/course/examples/sort_inside.occ:1:#INCLUDE "course.module" kroc/modules/course/examples/commstime.occ:2:#INCLUDE "course.module" kroc/modules/course/examples/test_bell.occ:4:#INCLUDE "course.module" kroc/modules/course/examples/test_utils.occ:1:#INCLUDE "course.module" kroc/modules/course/examples/double_echo.occ:1:#INCLUDE "course.module" kroc/modules/course/examples/casting.occ:1:#INCLUDE "course.module" kroc/modules/course/examples/sort_pump.occ:1:#INCLUDE "course.module" kroc/modules/course/examples/cast.occ:1:#INCLUDE "course.module" kroc/modules/course/answers/q3.occ:1:#INCLUDE "course.module" kroc/modules/course/examples/bar.occ:22:#INCLUDE "course.module" kroc/modules/course/answers/q7-adam.occ:1:#INCLUDE "course.module" kroc/modules/course/examples/sort_inside_2.occ:1:#INCLUDE "course.module" kroc/modules/course/answers/q7-nick.occ:1:#INCLUDE "course.module" kroc/modules/course/answers/q7-nick.occ:2:#INCLUDE "shared_screen.module" kroc/modules/course/answers/q4.occ:1:#INCLUDE "course.module" kroc/modules/course/answers/q6.occ:1:#INCLUDE "course.module" kroc/modules/course/examples/sort_pump_2.occ:1:#INCLUDE "course.module" kroc/modules/course/answers/q1.occ:1:#INCLUDE "course.module" kroc/modules/course/libsrc/shared_screen.occ:30:#INCLUDE "consts.inc" kroc/modules/course/libsrc/shared_screen.occ:31:#INCLUDE "shared_screen.inc" kroc/modules/course/libsrc/random.occ:50:#IF (TARGET.BITS.PER.WORD = 32) kroc/modules/course/libsrc/random.occ:84:#ENDIF kroc/modules/course/answers/q7-richard.occ:1:#INCLUDE "course.module" kroc/modules/course/libsrc/file_in.occ:22:#INCLUDE "consts.inc" kroc/modules/course/libsrc/utils.occ:24:#INCLUDE "consts.inc" kroc/modules/course/libsrc/string.occ:23:#INCLUDE "consts.inc" kroc/modules/course/answers/q7-eric.occ:1:#INCLUDE "course.module" kroc/modules/course/answers/q7-jonathan.occ:1:#INCLUDE "course.module" kroc/modules/course/answers/q2.occ:1:#INCLUDE "course.module" kroc/modules/course/answers/q7-jonathan2.occ:1:#INCLUDE "course.module" kroc/modules/course/answers/q7-jonathan2.occ:2:#INCLUDE "shared_screen.module" kroc/modules/course/answers/q7-fred.occ:1:#INCLUDE "course.module" kroc/modules/course/answers/q7.occ:1:#INCLUDE "course.module" kroc/modules/course/answers/q6-sort.occ:1:#INCLUDE "course.module" kroc/modules/course/exercises/bugs.occ:24:#INCLUDE "course.module" -- supplies the constant FLUSH (used below) kroc/modules/course/exercises/q3.occ:143:#INCLUDE "course.module" kroc/modules/course/exercises/q6.occ:173:#INCLUDE "course.module" kroc/modules/course/exercises/q6.occ:174:#INCLUDE "file.module" kroc/modules/course/exercises/q1.occ:4:#INCLUDE "course.module" kroc/modules/course/exercises/q7.occ:39:#INCLUDE "course.module" kroc/modules/course/exercises/cylons.occ:29:#INCLUDE "course.module" kroc/modules/course/exercises/cylons.occ:30:#INCLUDE "miniraster.module" kroc/modules/course/exercises/cylons.occ:31:#INCLUDE "rastergraphics.module" kroc/modules/course/exercises/cylons.occ:32:#INCLUDE "rasterio.module" kroc/modules/course/exercises/e1.occ:2:#INCLUDE "course.module" kroc/modules/course/exercises/q2.occ:70:#INCLUDE "course.module" kroc/modules/course/exercises/q4.occ:319:#INCLUDE "course.module" kroc/modules/course/exercises/robots-sei.occ:1:#INCLUDE "course.module" kroc/modules/course/exercises/robots-sei.occ:2:#INCLUDE "miniraster.module" kroc/modules/course/exercises/robots-sei.occ:3:#INCLUDE "rastergraphics.module" kroc/modules/course/exercises/robots-sei.occ:4:#INCLUDE "rasterio.module"
Now let me check for #IF NOT (DEFINED patterns and look at how .module files would typically work.
{
"pattern": "#IF|#DEFINE|#ENDIF|DEFINED",
"path": "/home/david/projects/codeassociates/occam2go/kroc/modules/course",
"output_mode": "content"
}kroc/modules/course/examples/bar.occ:32: #IF TARGET.BITS.PER.WORD = 16 kroc/modules/course/examples/bar.occ:36: #ENDIF kroc/modules/course/examples/bar.occ:48: #IF TARGET.BITS.PER.WORD = 16 kroc/modules/course/examples/bar.occ:52: #ENDIF kroc/modules/course/examples/bar.occ:64: #IF TARGET.BITS.PER.WORD = 16 kroc/modules/course/examples/bar.occ:68: #ENDIF kroc/modules/course/libsrc/random.occ:50:#IF (TARGET.BITS.PER.WORD = 32) kroc/modules/course/libsrc/random.occ:84:#ENDIF kroc/modules/course/libsrc/file_in.occ:243: #PRAGMA DEFINED s kroc/modules/course/libsrc/utils.occ:170: #PRAGMA DEFINED D kroc/modules/course/libsrc/utils.occ:530: #PRAGMA DEFINED s kroc/modules/course/libsrc/utils.occ:751: #PRAGMA DEFINED s kroc/modules/course/libsrc/stringbuf.occ:120: #PRAGMA DEFINED chars kroc/modules/course/libsrc/float_io.occ:138: #IF (TARGET.BITS.PER.WORD = 32) kroc/modules/course/libsrc/float_io.occ:268: #PRAGMA DEFINED Zfrac kroc/modules/course/libsrc/float_io.occ:299: #PRAGMA DEFINED Zfrac kroc/modules/course/libsrc/float_io.occ:456: #PRAGMA DEFINED Buf kroc/modules/course/libsrc/float_io.occ:496: #PRAGMA DEFINED Buf kroc/modules/course/libsrc/float_io.occ:567: #PRAGMA DEFINED Buf kroc/modules/course/libsrc/float_io.occ:592: #PRAGMA DEFINED len kroc/modules/course/libsrc/float_io.occ:593: #PRAGMA DEFINED string kroc/modules/course/libsrc/float_io.occ:767: #PRAGMA DEFINED Buf kroc/modules/course/libsrc/float_io.occ:937: #PRAGMA DEFINED Buf kroc/modules/course/libsrc/float_io.occ:989: #ENDIF kroc/modules/course/libsrc/float_io.occ:1104: #IF (TARGET.BITS.PER.WORD = 32) kroc/modules/course/libsrc/float_io.occ:1644: #PRAGMA DEFINED Buf kroc/modules/course/libsrc/float_io.occ:1676: #PRAGMA DEFINED Buf kroc/modules/course/libsrc/float_io.occ:1778: #PRAGMA DEFINED len, string kroc/modules/course/libsrc/float_io.occ:1958: #PRAGMA DEFINED Buf kroc/modules/course/libsrc/float_io.occ:2188: #ENDIF kroc/modules/course/exercises/robots-sei.occ:173: #PRAGMA DEFINED ranges -- avoid kroc defined analysis bug kroc/modules/course/exercises/robots-sei.occ:176: #PRAGMA DEFINED ranges -- avoid kroc defined analysis bug kroc/modules/course/exercises/robots-sei.occ:214: #PRAGMA DEFINED s -- avoid kroc defined analysis warning kroc/modules/course/exercises/robots-sei.occ:467: #PRAGMA DEFINED x, y -- avoid kroc defined analysis warning kroc/modules/course/exercises/robots-sei.occ:537: #PRAGMA DEFINED s -- avoid kroc defined analysis warning ... kroc/modules/course/exercises/cylons.occ:190: #PRAGMA DEFINED ranges -- avoid kroc defined analysis bug kroc/modules/course/exercises/cylons.occ:193: #PRAGMA DEFINED ranges -- avoid kroc defined analysis bug kroc/modules/course/exercises/cylons.occ:493: #PRAGMA DEFINED raster, looking -- avoid kroc defined analysis warning kroc/modules/course/exercises/cylons.occ:499: #PRAGMA DEFINED x, y -- avoid kroc defined analysis warning kroc/modules/course/exercises/cylons.occ:655: #PRAGMA DEFINED s -- avoid kroc defined analysis warning ...
{
"pattern": "\\.module",
"path": "/home/david/projects/codeassociates/occam2go/kroc",
"glob": "*.module",
"output_mode": "files_with_matches"
}Found 22 files kroc/tvm/arduino/occam/include/arch/m644p/adc.module kroc/tvm/arduino/occam/include/arch/m644p/avr.module kroc/tvm/arduino/occam/include/arch/m644p/external.interrupts.module kroc/tvm/arduino/occam/include/platforms/arduino/boardmap.module kroc/tvm/arduino/occam/include/platforms/arduinomega/boardmap.module kroc/tvm/arduino/occam/include/platforms/bare644/boardmap.module kroc/tvm/arduino/occam/include/platforms/pilotmega/boardmap.module kroc/tvm/arduino/occam/include/platforms/seeeduinomega/boardmap.module kroc/tvm/arduino/occam/include/plumbing.module kroc/tvm/arduino/occam/include/wiring.module kroc/tvm/arduino/occam/include/arch/common/pin.module kroc/tvm/arduino/occam/include/arch/common/pwm.common.module kroc/tvm/arduino/occam/include/arch/m1280/adc.module kroc/tvm/arduino/occam/include/arch/m1280/avr.module kroc/tvm/arduino/occam/include/arch/m328p/adc.module kroc/tvm/arduino/occam/include/arch/m328p/avr.module kroc/tvm/arduino/occam/include/arch/m328p/external.interrupts.module kroc/tvm/arduino/community/prettys/plumbing/plumbing modules/plumbing.module kroc/tvm/arduino/community/gatoruav/gps.module kroc/tvm/arduino/community/gatoruav/uavConfig.module kroc/tvm/arduino/community/gatoruav/uavsensors.module kroc/tvm/arduino/community/prettys/plc/plc-modules/plcBasic.module
/home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/community/prettys/plc/plc-modules/plcLatches.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/community/prettys/plc/plc-modules/plcCounters.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/community/prettys/plc/plc-modules/plcSequencers.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/community/prettys/plc/plc-modules/plcBasic.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/community/prettys/plc/plc-modules/plcLogic.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/community/gatoruav/control.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/community/gatoruav/uavConfig.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/community/gatoruav/imu.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/community/gatoruav/gps.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/community/gatoruav/uavsensors.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/community/prettys/plc/plc-modules/plcTiming.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/community/prettys/plumbing/plumbing modules/plumbing.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/community/prettys/plumbing/plumbing modules/servo.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/community/prettys/plumbing/plumbing modules/digital.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m1280/pwm.arch.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m1280/adc.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m1280/ffi.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m1280/external.interrupts.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m1280/chipmap.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m1280/avr.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m1280/constants.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m328p/pwm.arch.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m328p/adc.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m328p/ffi.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m328p/external.interrupts.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m328p/chipmap.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m328p/avr.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m328p/constants.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/common/pin.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/common/pwm.common.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/common/usart.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m644p/pwm.arch.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m644p/adc.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m644p/ffi.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m644p/external.interrupts.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m644p/chipmap.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m644p/avr.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/arch/m644p/constants.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/twi2.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/base.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/plumbing.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/deprecated.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/servo.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/digital.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/printing.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/pwm.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/platforms/arduinomega/boardmap.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/platforms/seeeduinomega/boardmap.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/platforms/bare644/boardmap.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/platforms/arduino/boardmap.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/platforms/pilotmega/boardmap.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/twi.module /home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/wiring.module
{
"file_path": "/home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/plumbing.module"
} 1→--
2→-- Copyright (C) 2009-2010 Christian Jacobsen
3→-- Copyright (C) 2009-2010 Matt Jadud
4→-- Copyright (C) 2010 Michael Andrew Pirrone-Brusse
5→-- Copyright (C) 2009-2010 Adam Sampson
6→--
7→-- This library is free software; you can redistribute it and/or
8→-- modify it under the terms of the GNU Lesser General Public
9→-- License as published by the Free Software Foundation; either
10→-- version 2 of the License, or (at your option) any later version.
11→--
12→-- This library is distributed in the hope that it will be useful,
13→-- but WITHOUT ANY WARRANTY; without even the implied warranty of
14→-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15→-- Lesser General Public License for more details.
16→--
17→-- You should have received a copy of the GNU General Public License
18→-- along with this program. If not, see <http://www.gnu.org/licenses/>.
19→
20→--** The Plumbing library.
21→--
22→-- [@code PROC]s in this module generally have arguments in this order:
23→--
24→-- [@item] non-channels;
25→-- [@item] input channels;
26→-- [@item] output channels.
27→--
28→-- @module plumbing
29→
30→#IF NOT (DEFINED (PLUMBING.MODULE))
31→#DEFINE PLUMBING.MODULE
32→
33→#INCLUDE "avr.module"
34→#INCLUDE "boardmap.module"
35→#INCLUDE "digital.module"
36→#INCLUDE "printing.module"
37→#INCLUDE "servo.module"
38→
39→--{{{ Constants
40→-- LEVEL, INPUT and OUTPUT are defined in digital.module. Here for reference.
41→--DATA TYPE LEVEL IS INT:
42→--VAL LEVEL LOW IS #0:
43→--VAL LEVEL HIGH IS #1:
44→
45→--VAL INT INPUT IS #0:
46→--VAL INT OUTPUT IS #1:
47→
48→-- VCC, INTERNAL, and AREF are defined in adc.module. Here for reference.
49→--VAL INT VCC IS #0:
50→--VAL INT INTERNAL IS #1:
51→--VAL INT AREF IS #2:
52→
53→VAL INT DEBOUNCE.TIME IS 50:
54→--}}}
55→
56→
57→--{{{ PROC debounce
58→--* Debounce a channel.
59→-- Debounces a channel of LEVELs. Specifically, if
60→-- multiple values come in within the DEBOUNCE.TIME
61→-- (currently 50ms), only the first value is passed through.
62→--
63→-- @param in The incoming LEVEL values
64→-- @param out The outgoing LEVEL values, debounced
65→PROC debounce (CHAN LEVEL in?, out!)
66→ LEVEL v:
67→ WHILE TRUE
68→ TIMER tim:
69→ INT t:
70→ SEQ
71→ in ? v
72→ tim ? t
73→ t := t PLUS DEBOUNCE.TIME
74→ INITIAL BOOL ignoring IS TRUE:
75→ WHILE ignoring
76→ ALT
77→ LEVEL any:
78→ in ? any
79→ SKIP
80→ tim ? AFTER t
81→ ignoring := FALSE
82→ out ! v
83→:
84→--}}}
85→
86→--{{{ PROC level.to.signal
87→--* Convert a LEVEL to a SIGNAL.
88→-- Consumes a stream of LEVEL values, and emits a SIGNAL
89→-- for each LEVEL received, regardless of whether it is
90→-- LOW or HIGH.
91→--
92→-- @param in Input LEVEL values.
93→-- @param out Output SIGNALs.
94→PROC level.to.signal (CHAN LEVEL in?, CHAN SIGNAL out!)
95→ WHILE TRUE
96→ SEQ
97→ LEVEL any:
98→ in ? any
99→ out ! SIGNAL
100→:
101→--}}}
102→
103→--{{{ PROC invert.level
104→--* Invert LEVELs.
105→-- Reads in LEVEL values, and outputs the opposite.
106→-- Upon receiving a LOW, sends a HIGH, and visa versa.
107→--
108→-- @param in Incoming LEVEL values.
109→-- @param out Outgoing LEVEL values, inverted.
110→PROC invert.level (CHAN LEVEL in?, out!)
111→ WHILE TRUE
112→ LEVEL v:
113→ SEQ
114→ in ? v
115→ out ! NOT v
116→:
117→--}}}
118→
119→--{{{ PROC tick
120→--* Generates a consistent stream of SIGNALs.
121→-- Every [@code period] milliseconds, a SIGNAL is generated.
122→--
123→-- @param period A delay time in milliseconds.
124→-- @param out SIGNALs generated after the given delay.
125→PROC tick (VAL INT period, CHAN SIGNAL out!)
126→ WHILE TRUE
127→ SEQ
128→ delay (period)
129→ out ! SIGNAL
130→:
131→--}}}
132→
133→--{{{ PROC toggle
134→--* Outputs an alternating stream of LEVEL values.
135→-- Starting with an initial level (either LOW or HIGH), this
136→-- process outputs a stream of alternating LEVEL values upon
137→-- request. On receiving a SIGNAL, the next LEVEL is emitted
138→--
139→-- @param initial.level Either LOW or HIGH to start.
140→-- @param in The request line.
141→-- @param out The alternating stream of LEVEL values.
142→PROC toggle (VAL LEVEL initial.level, CHAN SIGNAL in?, CHAN LEVEL out!)
143→ INITIAL LEVEL level IS initial.level:
144→ WHILE TRUE
145→ SEQ
146→ out ! level
147→ in ? SIGNAL
148→ level := NOT level
149→:
150→--}}}
151→
152→--{{{ PROC pin.toggle
153→--* Drives a pin alternately LOW and HIGH.
154→-- Upon request, alternates the level of a pin from LOW to HIGH.
155→--
156→-- @param pin The (digital) Arduino pin we want to drive.
157→-- @param initial.level Either LOW or HIGH.
158→-- @param in The request line.
159→PROC pin.toggle (VAL INT pin, VAL LEVEL initial.level, CHAN SIGNAL in?)
160→ CHAN LEVEL v:
161→ PAR
162→ toggle (initial.level, in?, v!)
163→ digital.output (pin, v?)
164→:
165→--}}}
166→
167→--{{{ PROC blink
168→--* Drives a pin alternately LOW and HIGH on a fixed cycle.
169→-- Every [@code delay.time] milliseconds, toggles a pin.
170→--
171→-- @param pin The Arduino pin.
172→-- @param delay.time The number of milliseconds between toggles.
173→PROC blink (VAL INT pin, delay.time)
174→ CHAN SIGNAL s:
175→ PAR
176→ tick (delay.time, s!)
177→ pin.toggle (pin, LOW, s?)
178→:
179→--}}}
180→
181→--{{{ PROC heartbeat
182→--FIXME: 20100714 drew
183→-- There are more boards w/o board LEDs... Do we even want this PROC?
184→-- Blinks the LED.PIN every 500 ms.
185→--FIXME: If there is no LED.PIN, I'd like to see a board-specific die(..)
186→-- 20100710 MCJ
187→-- Further, death looks like this:
188→-- Final machine state:
189→-- file=plumbing.module line=273
190→-- wptr=0326 (rel=004a) iptr=d56b (rel=0537) eflags=0001 sflags=0000
191→-- areg=d580 breg=0004 creg=0004 oreg=0000
192→-- 8000 8000 0000 d582 8000 8000 8000 wptr>d580 0320 0004 002b d58b 0002 0000
193→-- 64 9c 1f f3 b3 22 f0 22 4b d3 21 f0 iptr>22 f0 60 bd 22 23 f7 d2 42 d1 21 42
194→--
195→-- We may want to improve that... perhaps by using die() in some way.
196→
197→--* A parallel health monitor.
198→PROC heartbeat ()
199→ IF
200→ LED.PIN > 0
201→ blink (LED.PIN, 500)
202→ TRUE
203→ die("This board does not have an LED pin. Sorry.")
204→:
205→--}}}
206→
207→--{{{ PROC ADC
208→--* Reads the analog value of a given pin.
209→-- Upon request, performs an analog to digital conversion, comparing the
210→-- voltage at [@code analog.pin] with the specified reference voltage.
211→-- No matter which reference is used, the value of [@code out] will always
212→-- rest between 0 and 1023.
213→--
214→-- There is a safeguard put in place that should allow [@code analog.pin] to be
215→-- properly read if written as 0, 1, 2, etc., but it is still recommended that
216→-- one writes A0, A1, etc. to avoid confusion.
217→--
218→-- @param analog.pin The Analog pin number. (A0, A1, A2)
219→-- @param ref The source of the reference voltage. Either VCC (default),
220→-- AREF (external), or INTERNAL (1.1v internal reference).
221→-- @param in The request line.
222→-- @param out The output channel for converted readings. 0 - 1023.
223→PROC adc (VAL INT analog.pin, VAL INT ref, CHAN SIGNAL in?, CHAN INT out!)
224→ INITIAL INT avr.pin IS board.analog.to.chip(analog.pin):
225→ INT v:
226→ SEQ
227→ WHILE TRUE
228→ SEQ
229→ in ? SIGNAL
230→ adc.base (avr.pin, ref, v)
231→ out ! v
232→:
233→--}}}
234→
235→--{{{ PROC potentiometer.byte
236→--* Reads from a potentiometer and maps the incoming value to a BYTE.
237→-- Upon request, the incoming value from a potentiometer (a knob, slider...)
238→-- connected to [@code analog.pin] to will be mapped to an appropriate value
239→-- between 0-255.
240→--
241→-- There is a safeguard put in place that should allow [@code analog.pin] to be
242→-- properly read if written as 0, 1, 2, etc., but it is still recommended that
243→-- one writes A0, A1, etc. to avoid confusion.
244→--
245→-- @param analog.pin The analog pin the potentiometer is connected to.
246→-- @param in The request line.
247→-- @param out The output chanel for mapped values. 0-255.
248→PROC potentiometer.byte (VAL INT analog.pin, CHAN SIGNAL in?, CHAN BYTE out!)
249→ INITIAL INT avr.pin IS board.analog.to.chip (analog.pin):
250→ INT v:
251→ BYTE x:
252→
253→ WHILE TRUE
254→ SEQ
255→ in ? SIGNAL
256→ adc.base (avr.pin, VCC, v)
257→ x := (BYTE ((v * 25) / 102)) --v == in, x == out. (v / 1023) = (x / 255)
258→ out ! x
259→:
260→--}}}
261→
262→--{{{ PROC clamp.[byte/int]
263→--* Limits the range of values in a stream.
264→-- Takes [@code low] and [@code high] as limits, and any BYTEs read in that
265→-- are below [@code low] are clamped to [@code low], and likewise
266→-- with the [@code high] value.
267→--
268→-- @param low The lower limit for valid numbers.
269→-- @param high The upper limit for valid numbers.
270→-- @param in The input stream of BYTEs.
271→-- @param out The output stream of BYTEs.
272→PROC clamp.byte (VAL BYTE low, high, CHAN BYTE in?, out!)
273→ BYTE v:
274→ WHILE TRUE
275→ SEQ
276→ in ? v
277→ IF
278→ v < low
279→ v := low
280→ v > high
281→ v := high
282→ TRUE
283→ SKIP
284→ out ! v
285→:
286→
287→--* Limits the range of values in a stream.
288→-- Takes [@code low] and [@code high] as limits, and any INTs read in that
289→-- are below [@code low] are clamped to [@code low], and likewise
290→-- with the [@code high] value.
291→--
292→-- @param low The lower limit for valid numbers.
293→-- @param high The upper limit for valid numbers.
294→-- @param in The input stream of INTs.
295→-- @param out The output stream of INTs.
296→PROC clamp.int (VAL INT low, high, CHAN INT in?, out!)
297→ INT v:
298→ WHILE TRUE
299→ SEQ
300→ in ? v
301→ IF
302→ v < low
303→ v := low
304→ v > high
305→ v := high
306→ TRUE
307→ SKIP
308→ out ! v
309→:
310→--}}}
311→
312→--{{{ PROC crawl.[byte/int]
313→--* Crawls a BYTE from 0 to [@code high] and back down (and back up, etc.).
314→-- Pausing [@code wait] milliseconds between each signal send, and incrementing
315→-- (in either direction) [@code step] between each send, the outgoing value
316→-- is capped at 0 and [@code high].
317→--
318→-- @param high The upper limit of output values.
319→-- @param step The increment between each send.
320→-- @param wait The time - in milliseconds - to wait after a successful send
321→-- before attempting another.
322→-- @param out The output stream of BYTEs.
323→PROC crawl.byte (VAL BYTE high, step, VAL INT wait, CHAN BYTE out!)
324→ INITIAL BYTE pos IS 0:
325→ INITIAL BOOL up IS TRUE:
326→
327→ WHILE TRUE
328→ SEQ
329→ IF
330→ up = TRUE
331→ SEQ
332→ pos := pos + step
333→ IF
334→ pos < high
335→ SKIP
336→ pos > high
337→ SEQ
338→ pos := high
339→ up := FALSE
340→ TRUE
341→ up := FALSE
342→ TRUE
343→ SEQ
344→ pos := pos - step
345→ IF
346→ pos > 0
347→ SKIP
348→ pos < 0
349→ SEQ
350→ pos := 0
351→ up := TRUE
352→ TRUE
353→ up := TRUE
354→ out ! pos
355→ delay (wait)
356→:
357→
358→--* Crawls an INT from 0 to [@code high] and back down (and back up, etc.).
359→-- Pausing [@code wait] milliseconds between each signal send, and incrementing
360→-- (in either direction) [@code step] between each send, the outgoing value
361→-- is capped at 0 and [@code high].
362→--
363→-- @param high The upper limit of output values.
364→-- @param step The increment between each send.
365→-- @param wait The time - in milliseconds - to wait after a successful send
366→-- before attempting another.
367→-- @param out The output stream of INTs.
368→PROC crawl.int (VAL INT high, step, VAL INT wait, CHAN INT out!)
369→ INITIAL INT pos IS 0:
370→ INITIAL BOOL up IS TRUE:
371→
372→ WHILE TRUE
373→ SEQ
374→ IF
375→ up = TRUE
376→ SEQ
377→ pos := pos + step
378→ IF
379→ pos < high
380→ SKIP
381→ pos > high
382→ SEQ
383→ pos := high
384→ up := FALSE
385→ TRUE
386→ up := FALSE
387→ TRUE
388→ SEQ
389→ pos := pos - step
390→ IF
391→ pos > 0
392→ SKIP
393→ pos < 0
394→ SEQ
395→ pos := 0
396→ up := TRUE
397→ TRUE
398→ up := TRUE
399→ out ! pos
400→ delay (wait)
401→:
402→--}}}
403→
404→--{{{ PROC pwm[-/16]
405→--* Writes an analog value to a pin.
406→-- For a given (PWM) pin, sets the observed analog level to a value between
407→-- 0 and 255. Negative values are treated as 0, and values greater
408→-- than 255 are treated as 255.
409→--
410→-- @param board.pin The pin number.
411→-- @param level The input level channel.
412→PROC pwm (VAL INT board.pin, CHAN BYTE level?)
413→ INITIAL BYTE lvl IS 0:
414→ INITIAL INT avr.pin IS board.to.chip (board.pin):
415→ SEQ
416→ digital.mode (board.pin, OUTPUT)
417→ pwm8.setup (avr.pin, 64)
418→ WHILE TRUE
419→ SEQ
420→ level ? lvl
421→ pwm8.set.compare (avr.pin, lvl)
422→:
423→
424→--* Writes an analog value to a pin.
425→-- For a given (PWM) pin, sets the level to a value between
426→-- 0 and [@code top]. Negative values are treated as 0, and values greater
427→-- than [@code top] are treated as [code top].
428→--
429→-- [@em Be careful]. Not every PWM pin is connected to a 16 bit timer, so
430→-- not every pin labeled as a PWM can be used with this PROC.
431→--
432→-- @param board.pin The Arduino pin number
433→-- @param top The highest level top can be set to.
434→-- @param level The input level channel.
435→PROC pwm16 (VAL INT board.pin, VAL INT top, CHAN INT level?)
436→ INITIAL INT lvl IS 0:
437→ INITIAL INT avr.pin IS board.to.chip (board.pin):
438→ CHAN INT clamped:
439→ SEQ
440→ digital.mode (board.pin, OUTPUT)
441→ pwm16.setup (avr.pin, 8)
442→ pwm16.set.top (avr.pin, top)
443→ PAR
444→ clamp.int (0, top, level?, clamped!)
445→ WHILE TRUE
446→ SEQ
447→ clamped ? lvl
448→ pwm16.set.compare (avr.pin, lvl)
449→:
450→--}}}
451→
452→--{{{ PROC button.press
453→--* Watches for button presses on external level interrupt pins.
454→-- When a button is pressed a SIGNAL is generated. Uses digital.input,
455→-- debounce, and level.to.signal.
456→--
457→-- @param board.pin The pin the button is connected to
458→-- (pins 2 and 3 are safe bets).
459→-- @param out SIGNALs generated when the button is pressed.
460→PROC button.press (VAL INT board.pin, CHAN SIGNAL out!)
461→ CHAN LEVEL a, b:
462→ PAR
463→ digital.input (board.pin, a!)
464→ debounce (a?, b!)
465→ level.to.signal (b?, out!)
466→:
467→--}}}
468→
469→#ENDIF
470→{
"file_path": "/home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/occam/include/printing.module"
} 1→--
2→-- Copyright (C) 2009-2010 Christian Jacobsen
3→-- Copyright (C) 2009-2010 Matt Jadud
4→-- Copyright (C) 2010 Michael Andrew Pirrone-Brusse
5→-- Copyright (C) 2009-2010 Adam Sampson
6→--
7→-- This library is free software; you can redistribute it and/or
8→-- modify it under the terms of the GNU Lesser General Public
9→-- License as published by the Free Software Foundation; either
10→-- version 2 of the License, or (at your option) any later version.
11→--
12→-- This library is distributed in the hope that it will be useful,
13→-- but WITHOUT ANY WARRANTY; without even the implied warranty of
14→-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15→-- Lesser General Public License for more details.
16→--
17→-- You should have received a copy of the GNU General Public License
18→-- along with this program. If not, see <http://www.gnu.org/licenses/>.
19→--
20→--** Printing support for Plumbing
21→--
22→-- @module printing
23→
24→#IF NOT (DEFINED (PRINTING.MODULE))
25→#DEFINE PRINTING.MODULE
26→
27→VAL []INT dec.powers IS [10000, 1000, 100, 10, 1]:
28→
29→VAL INT32 scaling.INT32 IS 10000:
30→VAL REAL32 scaling.REAL32 IS 10000.0:
31→
32→
33→--{{{ PROC serial.setup
34→--* Begins serial operations on the given board pin.
35→--
36→-- [@code board.pin] [@em must] be written as TX0, RX0, TX1, RX1, etc.
37→-- In the case of this process, RX0 and TX0 will both signal the activation
38→-- of serial port 0, as RX1 and TX1 will activate port 1, etc. the 'R' and 'T'
39→-- can be used interchangeably.
40→--
41→-- @param board.pin The board pin to being serial operations on.
42→-- @param baud The baud rate at which to transmit serial data.
43→PROC serial.setup (VAL INT board.pin, VAL INT32 baud)
44→ VAL INT port IS board.to.serial.port (board.pin):
45→ serial.start (port, baud)
46→:
47→--}}}
48→
49→--{{{ PROC serial.read.byte
50→--* Reads a BYTE from the given pin.
51→--
52→-- [@code board.pin] [@em must] be written as TX0, RX0, TX1, RX1, etc.
53→--
54→-- @param board.pin The pin from which to read.
55→-- @param b The resulting byte from the read.
56→PROC serial.read.byte (VAL INT board.pin, RESULT BYTE b)
57→ VAL INT port IS board.to.serial.port (board.pin):
58→ serial.byte.in (port, b)
59→:
60→--}}}
61→
62→--{{{ PROC serial.write.byte
63→--* Write a BYTE to the given pin.
64→--
65→-- [@code board.pin] [@em must] be written as TX0, RX0, TX1, RX1, etc.
66→--
67→-- @param board.pin The board pin to be written to.
68→-- @param b The BYTE to be written.
69→PROC serial.write.byte (VAL INT board.pin, VAL BYTE b)
70→ VAL INT port IS board.to.serial.port (board.pin):
71→ serial.byte.out (port, b)
72→:
73→--}}}
74→
75→--{{{ PROC serial.write.int
76→--* Write an INT to the serial port in hex.
77→--
78→-- [@code board.pin] [@em must] be written as TX0, RX0, TX1, RX1, etc.
79→--
80→-- @param board.pin The board pin to be written to.
81→-- @param n The INT to write.
82→PROC serial.write.int (VAL INT board.pin, VAL INT n)
83→ VAL INT port IS board.to.serial.port (board.pin):
84→ VAL []BYTE digits IS "0123456789ABCDEF":
85→ SEQ i = 3 FOR 4 STEP -1
86→ serial.byte.out (port, digits[(n >> (i * 4)) /\ #F])
87→:
88→--}}}
89→
90→--{{{ PROC serial.write.int32
91→--* Write an INT32 to the serial port in hex.
92→--
93→-- [@code board.pin] [@em must] be written as TX0, RX0, TX1, RX1, etc.
94→--
95→-- @param board.pin The board pin to be written to.
96→-- @param n The long integer (INT32) to write.
97→PROC serial.write.int32 (VAL INT board.pin, VAL INT32 n)
98→ VAL INT port IS board.to.serial.port (board.pin):
99→ VAL []BYTE digits IS "0123456789ABCDEF":
100→ SEQ i = 7 FOR 8 STEP -1
101→ serial.byte.out (port, digits[INT ((n >> (i * 4)) /\ #F)])
102→:
103→--}}}
104→
105→--{{{ PROC serial.write.string
106→--* Write a string to the serial port.
107→--
108→-- [@code board.pin] [@em must] be written as TX0, RX0, TX1, RX1, etc.
109→--
110→-- @param board.pin The board pin to be written to.
111→-- @param string The array of BYTEs to write.
112→PROC serial.write.string (VAL INT board.pin, VAL []BYTE string)
113→ VAL INT port IS board.to.serial.port (board.pin):
114→ SEQ i = 0 FOR SIZE string
115→ serial.byte.out (port, string[i])
116→:
117→--}}}
118→
119→--{{{ PROC serial.write.newline
120→--* Write a newline.
121→--
122→-- [@code board.pin] [@em must] be written as TX0, RX0, TX1, RX1, etc.
123→--
124→-- @param board.pin The board pin to be written to.
125→PROC serial.write.newline (VAL INT board.pin)
126→ VAL INT port IS board.to.serial.port (board.pin):
127→ serial.byte.out (port, '*n')
128→:
129→--}}}
130→
131→--{{{ REAL32 Helper Functions
132→--* Fills the passed array with the [@em character] '0'.
133→--
134→-- @param arr The array to be filled with '0's.
135→PROC printing.zeroArray([]BYTE arr)
136→ SEQ i = 0 FOR (SIZE arr)
137→ arr[i] := '0'
138→:
139→
140→--* Helps the user trim the trailing 0s from an array of BYTEs by
141→-- decrementing [@code total] by one for every consecutive '0' at the end
142→-- of the BYTE array.
143→--
144→-- @param arr The array of BYTEs to be processed.
145→-- @param total On completion of the PROC, this will be the number of
146→-- elements of the array useful to printing.
147→PROC printing.trimTrailing0s (VAL []BYTE arr, INT total)
148→ SEQ
149→ total := (SIZE arr)
150→ INITIAL BOOL REMOVING IS TRUE:
151→ SEQ i = ((SIZE arr) - 1) FOR (SIZE arr) STEP (- 1)
152→ SEQ
153→ IF
154→ REMOVING AND (arr[i] = '0')
155→ total := total - 1
156→ TRUE
157→ REMOVING := FALSE
158→:
159→
160→--* Real 32 to array helper function.
161→--
162→-- Honestly, this is magic to me. You probably don't need to invoke this.
163→PROC printing.real32toa.helper (VAL INT lhs, []BYTE arr, INT length)
164→ [(SIZE dec.powers)]BYTE dest:
165→ INITIAL INT number IS lhs:
166→ SEQ
167→ SEQ i = 0 FOR (SIZE dec.powers)
168→ INT digit:
169→ SEQ
170→ digit := number / dec.powers[i]
171→ number := number REM dec.powers[i]
172→ dest[i] := (BYTE digit) + (BYTE '0')
173→
174→ INITIAL BOOL LEADING IS TRUE:
175→ SEQ index = 0 FOR (SIZE dest)
176→ SEQ
177→ IF
178→ LEADING AND (dest[index] = '0')
179→ SKIP
180→ LEADING AND (dest[index] <> '0')
181→ SEQ
182→ arr[length] := dest[index]
183→ length := length + 1
184→ LEADING := FALSE
185→ TRUE
186→ SEQ
187→ arr[length] := dest[index]
188→ length := length + 1
189→:
190→--}}}
191→
192→--{{{ PROC real32toa
193→--* Converts [@code n] into a printable array.
194→-- The BYTE array [@code arr] and the INT [@code total] should be passed to
195→-- this process blank, as [@code arr] will be populated with printable
196→-- characters, and [@code total] will suggest the number of useful elements
197→-- to write.
198→--
199→-- @param n The REAL32 to be printed.
200→-- @param arr The [@em initially empty] array to be used for storing BYTEs
201→-- for printing.
202→-- @param total The [@em initially zero] INT that will store the total number
203→-- of elements of [@code arr] useful for printing.
204→PROC real32toa (VAL REAL32 n, []BYTE arr, INT total)
205→ INITIAL REAL32 scaled IS n * scaling.REAL32:
206→ INT32 lhs32:
207→ INT lhs:
208→ INITIAL INT length IS 0:
209→ SEQ
210→ printing.zeroArray(arr)
211→ scaled := n * scaling.REAL32 -- We scale twice? Not worried about overflow then?
212→ lhs32 := INT32 TRUNC scaled
213→ lhs := INT (lhs32 / scaling.INT32)
214→ printing.real32toa.helper(lhs, arr, length)
215→ arr[length] := '.'
216→ lhs32 := lhs32 - ((INT32 lhs) * scaling.INT32)
217→ INITIAL INT start IS (length + 1):
218→ SEQ
219→ printing.real32toa.helper((INT lhs32), arr, start)
220→ printing.trimTrailing0s(arr, total)
221→:
222→--}}}
223→
224→PROC serial.write.dec.int (VAL INT port, VAL INT n)
225→ INITIAL INT index IS 0:
226→ INITIAL INT number IS n:
227→ INITIAL BOOL neg IS FALSE:
228→ IF
229→ n = 0
230→ serial.write.string (port, "0")
231→ TRUE
232→ SEQ
233→ IF
234→ n < 0
235→ SEQ
236→ neg := TRUE
237→ number := n * (- 1)
238→ TRUE
239→ SKIP
240→ IF
241→ neg
242→ serial.write.string (port, "-")
243→ TRUE
244→ SKIP
245→ INITIAL BOOL LEADING IS TRUE:
246→ WHILE (index < 5)
247→ INT digit:
248→ SEQ
249→ digit := number / dec.powers[index]
250→ number := number REM dec.powers[index]
251→ IF
252→ LEADING AND (digit = 0)
253→ SKIP
254→ (digit <> 0) OR (NOT LEADING)
255→ SEQ
256→ LEADING := FALSE
257→ digit := digit + (INT '0')
258→ serial.write.byte(port, (BYTE digit))
259→ index := index + 1
260→:
261→
262→#IF FALSE
263→-- This puppy is broken. Not sure why.
264→--{{{ PROC serial.write.real32
265→--* Write a REAL32 to the serial port in decimal form.
266→--
267→-- [@code board.pin] [@em must] be written as TX0, RX0, TX1, RX1, etc.
268→--
269→-- @param board.pin The board pin to be written to.
270→-- @param n The code REAL32 to write.
271→-- @param precision The maximum length of the printed number.
272→PROC serial.write.real32 (VAL INT board.pin, VAL REAL32 n, VAL INT precision)
273→ VAL INT port IS board.to.serial.port (board.pin):
274→ [precision]BYTE arr:
275→ INT total:
276→ SEQ
277→ printing.zeroArray(arr)
278→ real32toa (n, arr, total)
279→ SEQ i = 0 FOR total
280→ serial.byte.out (port, arr[i])
281→:
282→--}}}
283→#ENDIF
284→
285→#IF DEFINED (AVR.ATMEGA1280)
286→PROC serial.buffer.read (VAL INT board.pin, VAL BYTE start, end, RESULT []BYTE buffer, RESULT INT length)
287→ VAL INT port IS board.to.serial.port (board.pin):
288→ read.buffer.blocking (port, start, end, buffer, length)
289→:
290→#ENDIF
291→
292→#ENDIF
293→Now I have a clear picture. Let me look at the lexer to understand how tokens are processed, to plan the preprocessor integration point.
{
"file_path": "/home/david/projects/codeassociates/occam2go/lexer/lexer.go",
"limit": 50
} 1→package lexer
2→
3→import (
4→ "strings"
5→)
6→
7→type Lexer struct {
8→ input string
9→ position int // current position in input (points to current char)
10→ readPosition int // current reading position (after current char)
11→ ch byte // current char under examination
12→ line int
13→ column int
14→
15→ // Indentation tracking
16→ indentStack []int // stack of indentation levels
17→ pendingTokens []Token // tokens to emit before reading more input
18→ atLineStart bool
19→}
20→
21→func New(input string) *Lexer {
22→ l := &Lexer{
23→ input: input,
24→ line: 1,
25→ column: 0,
26→ indentStack: []int{0}, // start with base indentation of 0
27→ atLineStart: true,
28→ }
29→ l.readChar()
30→ return l
31→}
32→
33→func (l *Lexer) readChar() {
34→ if l.readPosition >= len(l.input) {
35→ l.ch = 0
36→ } else {
37→ l.ch = l.input[l.readPosition]
38→ }
39→ l.position = l.readPosition
40→ l.readPosition++
41→ l.column++
42→}
43→
44→func (l *Lexer) peekChar() byte {
45→ if l.readPosition >= len(l.input) {
46→ return 0
47→ }
48→ return l.input[l.readPosition]
49→}
50→ 1→package main
2→
3→import (
4→ "flag"
5→ "fmt"
6→ "os"
7→
8→ "github.com/codeassociates/occam2go/codegen"
9→ "github.com/codeassociates/occam2go/lexer"
10→ "github.com/codeassociates/occam2go/parser"
11→)
12→
13→const version = "0.1.0"
14→
15→func main() {
16→ showVersion := flag.Bool("version", false, "Print version and exit")
17→ outputFile := flag.String("o", "", "Output file (default: stdout)")
18→
19→ flag.Usage = func() {
20→ fmt.Fprintf(os.Stderr, "occam2go - An Occam to Go transpiler\n\n")
21→ fmt.Fprintf(os.Stderr, "Usage: %s [options] <input.occ>\n\n", os.Args[0])
22→ fmt.Fprintf(os.Stderr, "Options:\n")
23→ flag.PrintDefaults()
24→ }
25→
26→ flag.Parse()
27→
28→ if *showVersion {
29→ fmt.Printf("occam2go version %s\n", version)
30→ os.Exit(0)
31→ }
32→
33→ args := flag.Args()
34→ if len(args) < 1 {
35→ flag.Usage()
36→ os.Exit(1)
37→ }
38→
39→ inputFile := args[0]
40→
41→ // Read input file
42→ input, err := os.ReadFile(inputFile)
43→ if err != nil {
44→ fmt.Fprintf(os.Stderr, "Error reading file: %s\n", err)
45→ os.Exit(1)
46→ }
47→
48→ // Lex
49→ l := lexer.New(string(input))
50→
51→ // Parse
52→ p := parser.New(l)
53→ program := p.ParseProgram()
54→
55→ if len(p.Errors()) > 0 {
56→ fmt.Fprintf(os.Stderr, "Parse errors:\n")
57→ for _, err := range p.Errors() {
58→ fmt.Fprintf(os.Stderr, " %s\n", err)
59→ }
60→ os.Exit(1)
61→ }
62→
63→ // Generate Go code
64→ gen := codegen.New()
65→ output := gen.Generate(program)
66→
67→ // Write output
68→ if *outputFile != "" {
69→ err := os.WriteFile(*outputFile, []byte(output), 0644)
70→ if err != nil {
71→ fmt.Fprintf(os.Stderr, "Error writing file: %s\n", err)
72→ os.Exit(1)
73→ }
74→ } else {
75→ fmt.Print(output)
76→ }
77→}
78→{
"subagent_type": "Plan",
"prompt": "I need a detailed implementation plan for adding module support to the occam2go transpiler. Here's what I've learned from exploration:\n\n## Current State\n- occam2go is a transpiler: lexer → parser → ast → codegen pipeline\n- main.go reads a single .occ file, passes it through lexer.New(string) → parser.New(l) → gen.Generate(program)\n- The lexer operates on a string input, no file I/O awareness\n- No preprocessor support exists yet\n\n## Requirements\nThree sub-features needed:\n\n### 1. Preprocessor directives (#IF NOT (DEFINED ...), #DEFINE, #ENDIF)\n- Used as include guards: `#IF NOT (DEFINED (PLUMBING.MODULE))` / `#DEFINE PLUMBING.MODULE` / `#ENDIF`\n- Also used for conditional compilation: `#IF FALSE` ... `#ENDIF`, `#IF DEFINED (AVR.ATMEGA1280)` ... `#ENDIF`, `#IF (TARGET.BITS.PER.WORD = 32)` ... `#ENDIF`\n- `#COMMENT \"...\"` and `#PRAGMA DEFINED varname` also exist but can be treated as no-ops for now\n- The preprocessor directives are line-based, starting with # at column 0\n\n### 2. #INCLUDE directive \n- `#INCLUDE \"filename\"` - textual inclusion of another file\n- Used for .inc files (constants) and .module files\n- Files are resolved relative to: the including file's directory, and module search paths\n- Needs include guard support (#IF NOT DEFINED) to prevent double-inclusion\n\n### 3. Module file generation from SConscript\n- SConscript files (Python) define which .occ files comprise a module\n- For \"course\" module: libsrc/SConscript lists `course_lib_srcs = Split('utils.occ string.occ demo_cycles.occ demo_nets.occ file_in.occ float_io.occ random.occ')`\n- Also includes: `--include consts.inc` flag\n- Need to generate a `course.module` file that has `#INCLUDE` directives for all the relevant source files\n- The .module file itself should use include guards\n\n## Key Design Questions\n\n### Where to implement preprocessing\nThe best approach is a **preprocessing step before the lexer**. Since the lexer takes a string, a preprocessor can:\n1. Read the source file\n2. Process #INCLUDE by reading included files and substituting their content\n3. Process #IF/#DEFINE/#ENDIF by conditionally including/excluding text\n4. Produce a single expanded string\n5. Pass that to the existing lexer\n\nThis is a textual preprocessor, similar to C's cpp, operating before lexical analysis.\n\n### Implementation approach\nA new `preproc/` package with:\n- A `Preprocessor` struct that tracks defined symbols and include paths\n- A `Process(filename string) (string, error)` function that returns expanded source\n- Main.go updated to use preprocessor before lexer\n\n### SConscript processing\nA separate Go tool/command or a subcommand that:\n- Parses SConscript Python files (minimal subset: `Split('...')`, variable assignments)\n- Extracts the list of .occ source files and .inc includes\n- Generates a .module file with appropriate #INCLUDE and #IF NOT DEFINED guards\n\n### Course module specifics\nFrom libsrc/SConscript:\n- course.lib sources: utils.occ, string.occ, demo_cycles.occ, demo_nets.occ, file_in.occ, float_io.occ, random.occ\n- Include flag: --include consts.inc\n- shared_screen.lib sources: shared_screen.occ (with --include shared_screen.inc)\n\nA `course.module` file would look like:\n```\n#IF NOT (DEFINED (COURSE.MODULE))\n#DEFINE COURSE.MODULE\n#INCLUDE \"consts.inc\"\n#INCLUDE \"utils.occ\"\n#INCLUDE \"string.occ\"\n#INCLUDE \"demo_cycles.occ\"\n#INCLUDE \"demo_nets.occ\"\n#INCLUDE \"file_in.occ\"\n#INCLUDE \"float_io.occ\"\n#INCLUDE \"random.occ\"\n#ENDIF\n```\n\n## Implementation Order\nPlease design a plan that tackles these in order:\n1. First: Preprocessor directives (#IF, #DEFINE, #ENDIF, #COMMENT, #PRAGMA as no-ops)\n2. Second: #INCLUDE directive (textual file inclusion with search paths)\n3. Third: SConscript → .module file generation tool\n4. Fourth: Wire everything together in main.go, add tests\n\nConsider:\n- The preprocessor should be a separate package (preproc/)\n- It operates on text before the lexer sees it\n- Include paths need to be configurable (CLI flag like -I path)\n- The SConscript parser only needs to handle a minimal Python subset\n- Tests at each stage\n\nPlease provide a detailed, step-by-step implementation plan."
}[
{
"type": "text",
"text": "I now have a complete picture of the codebase. Here is the detailed implementation plan.\n\n---\n\n## Implementation Plan: Module Support for occam2go\n\n### Overview\n\nThis plan adds a textual preprocessor to occam2go that runs before the lexer. It handles `#IF`/`#DEFINE`/`#ENDIF` conditional compilation, `#INCLUDE` file inclusion, and provides a tool to generate `.module` files from SConscript build definitions. The preprocessor is a new `preproc/` package, consistent with the existing single-package-per-concern architecture (`lexer/`, `parser/`, `ast/`, `codegen/`).\n\n---\n\n### Phase 1: Preprocessor Directives (`#IF`, `#DEFINE`, `#ENDIF`, `#COMMENT`, `#PRAGMA`)\n\nThis phase builds the core preprocessor engine with conditional compilation but no file I/O (no `#INCLUDE` yet). It operates purely on strings, making it easy to test.\n\n**New file: `/home/david/projects/codeassociates/occam2go/preproc/preproc.go`**\n\nThe `Preprocessor` struct:\n\n```go\npackage preproc\n\ntype Preprocessor struct {\n defines map[string]bool // symbols that have been #DEFINEd\n includePaths []string // search paths for #INCLUDE (Phase 2)\n includedFiles map[string]bool // include guard tracking (Phase 2)\n errors []string // accumulated errors\n}\n\nfunc New(opts ...Option) *Preprocessor { ... }\n\n// Option pattern for configuration\ntype Option func(*Preprocessor)\nfunc WithDefines(defs map[string]bool) Option { ... }\nfunc WithIncludePaths(paths []string) Option { ... }\n\n// Process takes source text and filename, returns expanded text\nfunc (pp *Preprocessor) Process(source string, filename string) (string, error) { ... }\nfunc (pp *Preprocessor) Errors() []string { ... }\n```\n\n**Processing algorithm** -- line-by-line text processing:\n\n1. Split input into lines.\n2. Maintain a stack of `condState` structs for nested `#IF`/`#ELSE`/`#ENDIF`:\n ```go\n type condState struct {\n active bool // is current branch being included?\n seenElse bool // have we passed #ELSE?\n parentActive bool // was the enclosing scope active?\n }\n ```\n3. For each line:\n - If it starts with `#` (after optional whitespace), parse as a directive.\n - `#DEFINE SYMBOL` -- add to `defines` map (only if currently active).\n - `#IF expr` -- push new condState; evaluate expr to determine `active`.\n - `#ELSE` -- flip `active` (only if parent was active and we haven't seen else).\n - `#ENDIF` -- pop condState stack.\n - `#COMMENT \"...\"` -- skip line (no-op, emit blank line to preserve line numbers).\n - `#PRAGMA ...` -- skip line (no-op, emit blank line).\n - `#INCLUDE \"file\"` -- handled in Phase 2; for now, emit error or skip.\n - If not a directive and current state is active, emit the line.\n - If not active, emit a blank line (preserves line numbering for error messages).\n\n**Expression evaluator for `#IF`** -- a minimal evaluator supporting these forms found in real occam code:\n\n- `TRUE` / `FALSE` -- literal booleans\n- `DEFINED (SYMBOL.NAME)` -- checks if symbol is in defines map\n- `NOT (expr)` -- logical negation\n- `(TARGET.BITS.PER.WORD = 32)` -- equality comparison (predefined symbols)\n- Parenthesized grouping\n\nImplementation as a simple recursive descent mini-parser on the directive line text:\n\n```go\nfunc (pp *Preprocessor) evalExpr(text string) (bool, error) { ... }\nfunc (pp *Preprocessor) evalAtom(text string, pos *int) (bool, error) { ... }\n```\n\nPredefined symbols to set by default:\n- `TARGET.BITS.PER.WORD` with value `64` (or configurable) -- but since the expression evaluator only needs to handle `= 32` comparisons, we can treat `TARGET.BITS.PER.WORD = 32` as `false` on 64-bit Go targets, and `TARGET.BITS.PER.WORD = 64` as `true`. This is a pragmatic choice: the float_io.occ file uses `#IF (TARGET.BITS.PER.WORD = 32)` to gate 32-bit-specific code, and Go is always 64-bit int.\n\nFor Phase 1, the expression evaluator needs to handle these patterns from the real codebase:\n- `NOT (DEFINED (PLUMBING.MODULE))` -- from plumbing.module\n- `(TARGET.BITS.PER.WORD = 32)` -- from float_io.occ\n- `FALSE` -- for unconditional exclusion\n- `DEFINED (AVR.ATMEGA1280)` -- from arduino modules\n\n**New file: `/home/david/projects/codeassociates/occam2go/preproc/preproc_test.go`**\n\nTest cases:\n1. No directives -- source passes through unchanged.\n2. `#DEFINE` + `#IF DEFINED` -- symbol is defined, guarded block included.\n3. `#IF NOT (DEFINED (...))` -- include guard pattern, block included on first pass.\n4. `#IF FALSE` / `#ENDIF` -- block excluded.\n5. `#IF TRUE` / `#ENDIF` -- block included.\n6. `#ELSE` -- flips inclusion.\n7. Nested `#IF` -- inner block only active if outer is active.\n8. `#COMMENT` and `#PRAGMA` -- lines removed, blank lines emitted.\n9. Line count preservation -- output has same number of lines as input.\n10. `#IF (TARGET.BITS.PER.WORD = 32)` -- evaluates to false on 64-bit.\n11. Error cases: unmatched `#ENDIF`, missing `#ENDIF`, unknown directive.\n\n---\n\n### Phase 2: `#INCLUDE` Directive (File Inclusion)\n\nThis phase adds file I/O to the preprocessor. The `Process` method gains a `filename` parameter, and `#INCLUDE` resolves and reads files.\n\n**Changes to `/home/david/projects/codeassociates/occam2go/preproc/preproc.go`**:\n\nAdd a `ProcessFile(filename string) (string, error)` entry point that reads a file and calls the internal processing. The internal processor, when it encounters `#INCLUDE \"file\"`:\n\n1. Resolve the filename:\n - First, try relative to the directory of the currently-being-processed file.\n - Then, try each path in `includePaths` in order.\n - Return error if not found.\n\n2. Recursion guard:\n - Track a set of currently-being-processed files (by absolute path) to detect circular includes.\n - The `includedFiles` map tracks files already fully included; combined with `#IF NOT (DEFINED (...))` guards, this prevents double inclusion. But the preprocessor does NOT automatically skip re-includes -- that is handled by the `#IF DEFINED` guards in the source, which is the occam convention.\n\n3. Read the included file's content and recursively process it through the same preprocessor instance (sharing the `defines` map so that `#DEFINE` in an included file is visible to subsequent includes).\n\n4. Insert the processed content in place of the `#INCLUDE` line.\n\n**Line number tracking consideration**: Since the preprocessor produces a single flat string, line numbers in the expanded output will not match original file line numbers for included files. For now, this is acceptable -- the same limitation exists in C preprocessing without `#line` directives. A future enhancement could emit `//line` comments for Go's benefit, but that is out of scope.\n\n**Handling of `#USE`**: The real course library files use `#USE \"utils.tce\"` and `#USE \"course.lib\"`. `#USE` is the occam mechanism for linking pre-compiled libraries. For our transpiler, `#USE` should be treated as a no-op (emit blank line), since we handle everything through source-level inclusion via `#INCLUDE` and `.module` files. Add `#USE` as another recognized-but-ignored directive.\n\n**Additional test cases for `/home/david/projects/codeassociates/occam2go/preproc/preproc_test.go`**:\n\n1. Basic `#INCLUDE` -- include a file, content appears in output.\n2. Include with search paths -- file found via `-I` path.\n3. Include guard pattern -- file included once, second `#INCLUDE` of same file is guarded by `#IF NOT (DEFINED (...))`.\n4. Nested includes -- file A includes file B which includes file C.\n5. Circular include detection -- error raised.\n6. File not found -- error raised.\n7. `#USE` -- treated as no-op.\n\nTests will use `os.MkdirTemp` to create temporary file trees for include resolution testing.\n\n---\n\n### Phase 3: SConscript Parser and `.module` File Generator\n\nThis is a standalone tool that reads SConscript files and generates `.module` files. It can be implemented as either:\n- A subcommand of occam2go (`occam2go gen-module ...`), or\n- A separate Go source file invoked via `go run`.\n\nRecommendation: implement as a subcommand to keep tooling unified.\n\n**New file: `/home/david/projects/codeassociates/occam2go/modgen/modgen.go`**\n\nThe module generator package:\n\n```go\npackage modgen\n\ntype ModuleConfig struct {\n Name string // e.g., \"course\"\n GuardSymbol string // e.g., \"COURSE.MODULE\"\n Includes []string // e.g., [\"consts.inc\"]\n Sources []string // e.g., [\"utils.occ\", \"string.occ\", ...]\n}\n\n// GenerateModule produces the text of a .module file\nfunc GenerateModule(cfg ModuleConfig) string { ... }\n\n// ParseSConscript extracts module configs from a libsrc/SConscript file\nfunc ParseSConscript(content string) ([]ModuleConfig, error) { ... }\n```\n\n**SConscript parsing** -- minimal Python subset parser:\n\nThe parser only needs to handle the patterns found in the course module's SConscript:\n\n1. `Split('''...''')` or `Split('...')` -- extract whitespace-separated filenames from the string.\n2. Variable assignment: `varname = Split(...)` -- associate names with file lists.\n3. `OccamLibrary('name.lib', varsource, OCCBUILDFLAGS='--include file.inc')` -- extract library name, source variable reference, and `--include` flags.\n4. Extract from `OCCBUILDFLAGS` the `--include` and `--need` flags.\n\nImplementation approach: line-by-line regex matching rather than a full Python parser. The patterns are very constrained:\n\n```go\nvar splitPattern = regexp.MustCompile(`(\\w+)\\s*=\\s*Split\\('''([\\s\\S]*?)'''\\)`)\nvar splitSinglePattern = regexp.MustCompile(`(\\w+)\\s*=\\s*Split\\('([^']*)'\\)`)\nvar libPattern = regexp.MustCompile(`OccamLibrary\\(\\s*'([^']+)'\\s*,\\s*(\\w+)`)\nvar includeFlag = regexp.MustCompile(`--include\\s+(\\S+)`)\n```\n\n**Generated `.module` file format** (matching the real plumbing.module pattern):\n\n```\n#IF NOT (DEFINED (COURSE.MODULE))\n#DEFINE COURSE.MODULE\n#INCLUDE \"consts.inc\"\n#INCLUDE \"utils.occ\"\n#INCLUDE \"string.occ\"\n#INCLUDE \"demo_cycles.occ\"\n#INCLUDE \"demo_nets.occ\"\n#INCLUDE \"file_in.occ\"\n#INCLUDE \"float_io.occ\"\n#INCLUDE \"random.occ\"\n#ENDIF\n```\n\nThe guard symbol is derived from the module name: `course` becomes `COURSE.MODULE`.\n\n**New file: `/home/david/projects/codeassociates/occam2go/modgen/modgen_test.go`**\n\nTest cases:\n1. `GenerateModule` produces correct output with guard, includes, and sources.\n2. `ParseSConscript` correctly extracts course.lib config from real SConscript content.\n3. `ParseSConscript` correctly extracts shared_screen.lib config.\n4. Guard symbol generation: `course` -> `COURSE.MODULE`, `shared_screen` -> `SHARED.SCREEN.MODULE`.\n\n---\n\n### Phase 4: Wire Everything Together in `main.go`\n\n**Changes to `/home/david/projects/codeassociates/occam2go/main.go`**:\n\n1. Add CLI flags:\n - `-I path` -- add include search path (repeatable, or comma-separated). Use a custom flag type or `flag.Func`.\n - `-D SYMBOL` -- predefine a preprocessor symbol (repeatable).\n - `gen-module` subcommand -- if first positional arg is `gen-module`, invoke the module generator instead of the transpiler.\n\n2. Update the pipeline:\n ```go\n // Before:\n input, err := os.ReadFile(inputFile)\n l := lexer.New(string(input))\n\n // After:\n pp := preproc.New(\n preproc.WithIncludePaths(includePaths),\n preproc.WithDefines(predefinedSymbols),\n )\n expanded, err := pp.ProcessFile(inputFile)\n if err != nil { ... }\n l := lexer.New(expanded)\n ```\n\n3. For `gen-module` subcommand:\n ```\n occam2go gen-module -sconscript path/to/SConscript -o course.module\n ```\n Or simpler:\n ```\n occam2go gen-module path/to/libsrc/SConscript\n ```\n This reads the SConscript, parses it, and writes `.module` files to stdout or specified output.\n\n**Updated CLI usage**:\n```\noccam2go [options] <input.occ>\noccam2go gen-module [options] <SConscript>\n\nOptions:\n -o output Output file (default: stdout)\n -I path Add include search path (can be specified multiple times)\n -D symbol Predefine a preprocessor symbol\n -version Print version and exit\n```\n\n**Changes to test infrastructure**:\n\nThe existing `transpileCompileRun` in `/home/david/projects/codeassociates/occam2go/codegen/e2e_test.go` takes a string and passes it directly to `lexer.New`. This should remain as-is for existing tests. For new e2e tests that exercise the preprocessor, add a separate helper:\n\n```go\nfunc preprocessTranspileCompileRun(t *testing.T, files map[string]string, mainFile string) string {\n // Create temp dir with all files\n // Run preprocessor on mainFile\n // Feed result to lexer -> parser -> codegen\n // Compile and run\n}\n```\n\n**New e2e test cases**:\n1. A main `.occ` file that does `#INCLUDE \"consts.inc\"` where `consts.inc` defines a `VAL INT` constant, then uses it.\n2. A main `.occ` file that includes a `.module` file with include guards, verifying the guard prevents double inclusion.\n3. A main `.occ` file with `#IF FALSE` / `#ENDIF` around code that would cause parse errors (verifying it is excluded).\n\n---\n\n### Dependency Order and Sequencing\n\n```\nPhase 1: preproc/preproc.go + preproc/preproc_test.go\n (no file I/O, pure string processing, testable in isolation)\n |\n v\nPhase 2: Add #INCLUDE to preproc/ + file-based tests\n (adds file I/O, search path resolution)\n |\n v\nPhase 3: modgen/modgen.go + modgen/modgen_test.go\n (standalone, only depends on understanding the .module format from Phase 1-2)\n |\n v\nPhase 4: main.go changes + e2e tests\n (wires preproc + modgen into the CLI)\n```\n\nPhases 1 and 3 are somewhat independent (3 does not require 1 to be complete), but the logical flow is clearer when done in order.\n\n---\n\n### Potential Challenges\n\n1. **Indentation in included files**: The occam lexer tracks indentation via `indentStack`. When content from multiple files is concatenated, indentation must be consistent. Since `#INCLUDE` in occam is textual substitution (like C's `#include`), the included file's content appears at the top level, which is the correct behavior -- included files (like `consts.inc`) contain top-level declarations (`VAL BYTE NULL IS 0:`) that do not have leading indentation.\n\n2. **`#IF` inside indented blocks**: The float_io.occ file has `#IF (TARGET.BITS.PER.WORD = 32)` at 2-space indent (inside a PROC). The preprocessor must handle directives that appear at any indentation level, not just column 0. Looking at the real files, directives like `#PRAGMA DEFINED` appear indented. The preprocessor should detect lines where the first non-whitespace is `#` as directives.\n\n3. **Blank line emission**: Emitting blank lines for excluded `#IF` blocks and for directives preserves line count, which helps with error messages referencing line numbers. However, the lexer's indentation tracking treats blank lines specially (they don't affect indent level). This should work correctly since blank lines are benign to the lexer.\n\n4. **`#ELSE` support**: The float_io.occ uses `#ELSE` (line 987, 2186). The preprocessor must handle `#IF` / `#ELSE` / `#ENDIF` as a three-state construct.\n\n5. **`#USE` directive**: Present in real source files (`#USE \"utils.tce\"`, `#USE \"course.lib\"`). Must be recognized and ignored (no-op) to avoid \"unknown directive\" errors.\n\n6. **Expression evaluation edge cases**: The form `(TARGET.BITS.PER.WORD = 32)` uses `=` which is occam's equality operator. The mini-evaluator needs to handle `SYMBOL = VALUE` comparisons, not just boolean expressions. This requires the evaluator to support a small symbol-to-value mapping (not just defined/undefined), at least for `TARGET.BITS.PER.WORD`.\n\n---\n\n### File Summary\n\nNew files to create:\n- `preproc/preproc.go` -- Preprocessor core: directive parsing, conditional evaluation, file inclusion\n- `preproc/preproc_test.go` -- Unit tests for preprocessor\n- `modgen/modgen.go` -- SConscript parser and .module file generator\n- `modgen/modgen_test.go` -- Unit tests for module generator\n\nFiles to modify:\n- `main.go` -- Add `-I`, `-D` flags; insert preprocessor before lexer; add `gen-module` subcommand\n- `codegen/e2e_test.go` -- Add e2e tests exercising preprocessor + transpilation\n- `CLAUDE.md` -- Document new `preproc/` and `modgen/` packages, CLI flags, and module workflow\n- `TODO.md` -- Update implementation status\n- `go.mod` -- No changes needed (no external dependencies)\n\n---\n\n### Critical Files for Implementation\n- `/home/david/projects/codeassociates/occam2go/main.go` - Entry point to modify: insert preprocessor step, add CLI flags and gen-module subcommand\n- `/home/david/projects/codeassociates/occam2go/lexer/lexer.go` - Must understand its string input interface to ensure preprocessor output is compatible\n- `/home/david/projects/codeassociates/occam2go/kroc/modules/course/libsrc/SConscript` - Reference for SConscript parsing patterns\n- `/home/david/projects/codeassociates/occam2go/kroc/tvm/arduino/community/prettys/plumbing/plumbing modules/plumbing.module` - Reference for real .module file format with include guards\n- `/home/david/projects/codeassociates/occam2go/codegen/e2e_test.go` - Pattern to follow for new e2e tests involving preprocessed source"
},
{
"type": "text",
"text": "agentId: a867cdc (for resuming to continue this agent's work if needed)\n<usage>total_tokens: 49521\ntool_uses: 30\nduration_ms: 491226</usage>"
}
]Let me now write the plan file and ask a couple of clarifying questions before finalizing.
Let me check a couple more things before writing the final plan - specifically the #ELSE usage and how e2e tests work.
{
"pattern": "#ELSE",
"path": "/home/david/projects/codeassociates/occam2go/kroc/modules/course",
"output_mode": "content"
}kroc/modules/course/examples/bar.occ:34: #ELSE kroc/modules/course/examples/bar.occ:50: #ELSE kroc/modules/course/examples/bar.occ:66: #ELSE kroc/modules/course/libsrc/random.occ:71:#ELSE kroc/modules/course/libsrc/float_io.occ:987: #ELSE kroc/modules/course/libsrc/float_io.occ:2186: #ELSE
{
"file_path": "/home/david/projects/codeassociates/occam2go/codegen/e2e_test.go",
"limit": 80
} 1→package codegen
2→
3→import (
4→ "os"
5→ "os/exec"
6→ "path/filepath"
7→ "strings"
8→ "testing"
9→
10→ "github.com/codeassociates/occam2go/lexer"
11→ "github.com/codeassociates/occam2go/parser"
12→)
13→
14→// transpileCompileRun takes Occam source, transpiles to Go, compiles, runs,
15→// and returns the stdout output
16→func transpileCompileRun(t *testing.T, occamSource string) string {
17→ t.Helper()
18→
19→ // Transpile
20→ l := lexer.New(occamSource)
21→ p := parser.New(l)
22→ program := p.ParseProgram()
23→
24→ if len(p.Errors()) > 0 {
25→ for _, err := range p.Errors() {
26→ t.Errorf("parser error: %s", err)
27→ }
28→ t.FailNow()
29→ }
30→
31→ gen := New()
32→ goCode := gen.Generate(program)
33→
34→ // Create temp directory for this test
35→ tmpDir, err := os.MkdirTemp("", "occam2go-test-*")
36→ if err != nil {
37→ t.Fatalf("failed to create temp dir: %v", err)
38→ }
39→ defer os.RemoveAll(tmpDir)
40→
41→ // Write Go source
42→ goFile := filepath.Join(tmpDir, "main.go")
43→ if err := os.WriteFile(goFile, []byte(goCode), 0644); err != nil {
44→ t.Fatalf("failed to write Go file: %v", err)
45→ }
46→
47→ // Compile
48→ binFile := filepath.Join(tmpDir, "main")
49→ compileCmd := exec.Command("go", "build", "-o", binFile, goFile)
50→ compileOutput, err := compileCmd.CombinedOutput()
51→ if err != nil {
52→ t.Fatalf("compilation failed: %v\nOutput: %s\nGo code:\n%s", err, compileOutput, goCode)
53→ }
54→
55→ // Run
56→ runCmd := exec.Command(binFile)
57→ output, err := runCmd.CombinedOutput()
58→ if err != nil {
59→ t.Fatalf("execution failed: %v\nOutput: %s", err, output)
60→ }
61→
62→ return string(output)
63→}
64→
65→func TestE2E_PrintInt(t *testing.T) {
66→ occam := `SEQ
67→ INT x:
68→ x := 42
69→ print.int(x)
70→`
71→ output := transpileCompileRun(t, occam)
72→ expected := "42\n"
73→ if output != expected {
74→ t.Errorf("expected %q, got %q", expected, output)
75→ }
76→}
77→
78→func TestE2E_Addition(t *testing.T) {
79→ occam := `SEQ
80→ INT x, y:# Plan: Module Support (#INCLUDE, Preprocessor, SConscript)
## Context
Occam programs use `#INCLUDE "course.module"` to import library modules. The KRoC project (cloned at `./kroc/`) contains the course module source at `./kroc/modules/course/libsrc/`. The module's composition is defined by SConscript (Python) build files. To support this, we need: (1) a textual preprocessor for `#IF`/`#DEFINE`/`#ENDIF`/`#INCLUDE`, (2) a tool to generate `.module` files from SConscript, and (3) wiring into the CLI.
The preprocessor is a pre-lexer text expansion pass (like C's `cpp`), producing a single expanded string that feeds into the existing `lexer.New(string)`.
---
## Phase 1: Preprocessor — Conditional Directives
**New file: `preproc/preproc.go`**
```go
type Preprocessor struct {
defines map[string]string // symbol → value (empty string for flag-only defines)
includePaths []string
errors []string
}
```
- Line-by-line processing with a condition stack for `#IF`/`#ELSE`/`#ENDIF` nesting
- When a line's first non-whitespace is `#`, parse as directive
- Excluded lines → emit blank lines (preserves line numbers for error messages)
Directives to handle:
| Directive | Action |
|---|---|
| `#DEFINE SYMBOL` | Add to defines map |
| `#IF expr` | Push condition stack, evaluate expr |
| `#ELSE` | Flip active state |
| `#ENDIF` | Pop condition stack |
| `#COMMENT "..."` | No-op (emit blank line) |
| `#PRAGMA ...` | No-op (emit blank line) |
| `#USE "..."` | No-op (emit blank line) — KRoC compiled library linking, not needed for source transpilation |
| `#INCLUDE "..."` | Phase 2 |
Expression evaluator (minimal recursive descent) supporting patterns found in real code:
- `TRUE` / `FALSE`
- `DEFINED (SYMBOL.NAME)`
- `NOT (expr)`
- `(SYMBOL = value)` — for `(TARGET.BITS.PER.WORD = 32)`
Predefined symbols: `TARGET.BITS.PER.WORD` = `"64"` (Go is always 64-bit int).
**New file: `preproc/preproc_test.go`** — unit tests for conditional directives, nesting, `#ELSE`, line count preservation, edge cases.
---
## Phase 2: Preprocessor — `#INCLUDE` File Inclusion
**Additions to `preproc/preproc.go`**:
- `ProcessFile(filename string) (string, error)` — reads file, processes it
- `#INCLUDE "file"` resolution: first relative to current file's directory, then each `includePaths` entry
- Recursive processing: included file content is processed through the same `Preprocessor` instance (shared `defines` map, so include guards work)
- Circular include detection via a "currently processing" file set (by absolute path)
Include guard pattern (standard in occam modules):
```
#IF NOT (DEFINED (COURSE.MODULE))
#DEFINE COURSE.MODULE
...
#ENDIF
```
**Additional tests**: file inclusion, search path resolution, include guard double-inclusion prevention, nested includes, circular include error, file-not-found error. Tests use `os.MkdirTemp` for temp file trees.
---
## Phase 3: Module File Generator from SConscript
**New file: `modgen/modgen.go`**
Minimal SConscript parser using regex, extracting:
- `varname = Split('''...''')` → list of source files
- `OccamLibrary('name.lib', source_var, OCCBUILDFLAGS='--include file.inc')` → library name, sources, includes
- `--need libname` flags → dependency modules
Output: `.module` file text with include guards + `#INCLUDE` directives.
Example generated `course.module`:
```
#IF NOT (DEFINED (COURSE.MODULE))
#DEFINE COURSE.MODULE
#INCLUDE "consts.inc"
#INCLUDE "utils.occ"
#INCLUDE "string.occ"
#INCLUDE "demo_cycles.occ"
#INCLUDE "demo_nets.occ"
#INCLUDE "file_in.occ"
#INCLUDE "float_io.occ"
#INCLUDE "random.occ"
#ENDIF
```
**New file: `modgen/modgen_test.go`** — tests against real course SConscript content.
---
## Phase 4: Wire into CLI + E2E Tests
**Modify: `main.go`**
- Add `-I path` flag (repeatable) for include search paths
- Add `-D SYMBOL` flag (repeatable) for predefined symbols
- Add `gen-module` subcommand: `occam2go gen-module [-o output] <SConscript>`
- Insert preprocessor before lexer in the main pipeline:
```
pp := preproc.New(WithIncludePaths(...), WithDefines(...))
expanded, err := pp.ProcessFile(inputFile)
l := lexer.New(expanded)
```
**Modify: `codegen/e2e_test.go`** — add file-based e2e test helper and tests for:
1. Simple `#INCLUDE` of a constants file → use constant in program
2. `#IF FALSE` excluding code
3. Include guard preventing double inclusion
---
## Files Summary
| Action | File |
|---|---|
| Create | `preproc/preproc.go` |
| Create | `preproc/preproc_test.go` |
| Create | `modgen/modgen.go` |
| Create | `modgen/modgen_test.go` |
| Modify | `main.go` |
| Modify | `codegen/e2e_test.go` |
---
## Verification
After each phase, run `go test ./...` to confirm no regressions. After Phase 4:
1. `go test ./preproc` — preprocessor unit tests pass
2. `go test ./modgen` — module generator tests pass
3. `go test ./codegen` — existing + new e2e tests pass
4. Manual test: `go run . gen-module kroc/modules/course/libsrc/SConscript` generates correct course.module
5. Manual test: create a hello_world.occ with `#INCLUDE "course.module"` and transpile with `-I kroc/modules/course/libsrc`
{
"allowedPrompts": [
{
"tool": "Bash",
"prompt": "run go tests"
},
{
"tool": "Bash",
"prompt": "run go build"
},
{
"tool": "Bash",
"prompt": "run the transpiler manually for testing"
}
],
"plan": "# Plan: Module Support (#INCLUDE, Preprocessor, SConscript)\n\n## Context\n\nOccam programs use `#INCLUDE \"course.module\"` to import library modules. The KRoC project (cloned at `./kroc/`) contains the course module source at `./kroc/modules/course/libsrc/`. The module's composition is defined by SConscript (Python) build files. To support this, we need: (1) a textual preprocessor for `#IF`/`#DEFINE`/`#ENDIF`/`#INCLUDE`, (2) a tool to generate `.module` files from SConscript, and (3) wiring into the CLI.\n\nThe preprocessor is a pre-lexer text expansion pass (like C's `cpp`), producing a single expanded string that feeds into the existing `lexer.New(string)`.\n\n---\n\n## Phase 1: Preprocessor — Conditional Directives\n\n**New file: `preproc/preproc.go`**\n\n```go\ntype Preprocessor struct {\n defines map[string]string // symbol → value (empty string for flag-only defines)\n includePaths []string\n errors []string\n}\n```\n\n- Line-by-line processing with a condition stack for `#IF`/`#ELSE`/`#ENDIF` nesting\n- When a line's first non-whitespace is `#`, parse as directive\n- Excluded lines → emit blank lines (preserves line numbers for error messages)\n\nDirectives to handle:\n| Directive | Action |\n|---|---|\n| `#DEFINE SYMBOL` | Add to defines map |\n| `#IF expr` | Push condition stack, evaluate expr |\n| `#ELSE` | Flip active state |\n| `#ENDIF` | Pop condition stack |\n| `#COMMENT \"...\"` | No-op (emit blank line) |\n| `#PRAGMA ...` | No-op (emit blank line) |\n| `#USE \"...\"` | No-op (emit blank line) — KRoC compiled library linking, not needed for source transpilation |\n| `#INCLUDE \"...\"` | Phase 2 |\n\nExpression evaluator (minimal recursive descent) supporting patterns found in real code:\n- `TRUE` / `FALSE`\n- `DEFINED (SYMBOL.NAME)`\n- `NOT (expr)`\n- `(SYMBOL = value)` — for `(TARGET.BITS.PER.WORD = 32)`\n\nPredefined symbols: `TARGET.BITS.PER.WORD` = `\"64\"` (Go is always 64-bit int).\n\n**New file: `preproc/preproc_test.go`** — unit tests for conditional directives, nesting, `#ELSE`, line count preservation, edge cases.\n\n---\n\n## Phase 2: Preprocessor — `#INCLUDE` File Inclusion\n\n**Additions to `preproc/preproc.go`**:\n\n- `ProcessFile(filename string) (string, error)` — reads file, processes it\n- `#INCLUDE \"file\"` resolution: first relative to current file's directory, then each `includePaths` entry\n- Recursive processing: included file content is processed through the same `Preprocessor` instance (shared `defines` map, so include guards work)\n- Circular include detection via a \"currently processing\" file set (by absolute path)\n\nInclude guard pattern (standard in occam modules):\n```\n#IF NOT (DEFINED (COURSE.MODULE))\n#DEFINE COURSE.MODULE\n...\n#ENDIF\n```\n\n**Additional tests**: file inclusion, search path resolution, include guard double-inclusion prevention, nested includes, circular include error, file-not-found error. Tests use `os.MkdirTemp` for temp file trees.\n\n---\n\n## Phase 3: Module File Generator from SConscript\n\n**New file: `modgen/modgen.go`**\n\nMinimal SConscript parser using regex, extracting:\n- `varname = Split('''...''')` → list of source files\n- `OccamLibrary('name.lib', source_var, OCCBUILDFLAGS='--include file.inc')` → library name, sources, includes\n- `--need libname` flags → dependency modules\n\nOutput: `.module` file text with include guards + `#INCLUDE` directives.\n\nExample generated `course.module`:\n```\n#IF NOT (DEFINED (COURSE.MODULE))\n#DEFINE COURSE.MODULE\n#INCLUDE \"consts.inc\"\n#INCLUDE \"utils.occ\"\n#INCLUDE \"string.occ\"\n#INCLUDE \"demo_cycles.occ\"\n#INCLUDE \"demo_nets.occ\"\n#INCLUDE \"file_in.occ\"\n#INCLUDE \"float_io.occ\"\n#INCLUDE \"random.occ\"\n#ENDIF\n```\n\n**New file: `modgen/modgen_test.go`** — tests against real course SConscript content.\n\n---\n\n## Phase 4: Wire into CLI + E2E Tests\n\n**Modify: `main.go`**\n\n- Add `-I path` flag (repeatable) for include search paths\n- Add `-D SYMBOL` flag (repeatable) for predefined symbols\n- Add `gen-module` subcommand: `occam2go gen-module [-o output] <SConscript>`\n- Insert preprocessor before lexer in the main pipeline:\n ```\n pp := preproc.New(WithIncludePaths(...), WithDefines(...))\n expanded, err := pp.ProcessFile(inputFile)\n l := lexer.New(expanded)\n ```\n\n**Modify: `codegen/e2e_test.go`** — add file-based e2e test helper and tests for:\n1. Simple `#INCLUDE` of a constants file → use constant in program\n2. `#IF FALSE` excluding code\n3. Include guard preventing double inclusion\n\n---\n\n## Files Summary\n\n| Action | File |\n|---|---|\n| Create | `preproc/preproc.go` |\n| Create | `preproc/preproc_test.go` |\n| Create | `modgen/modgen.go` |\n| Create | `modgen/modgen_test.go` |\n| Modify | `main.go` |\n| Modify | `codegen/e2e_test.go` |\n\n---\n\n## Verification\n\nAfter each phase, run `go test ./...` to confirm no regressions. After Phase 4:\n1. `go test ./preproc` — preprocessor unit tests pass\n2. `go test ./modgen` — module generator tests pass\n3. `go test ./codegen` — existing + new e2e tests pass\n4. Manual test: `go run . gen-module kroc/modules/course/libsrc/SConscript` generates correct course.module\n5. Manual test: create a hello_world.occ with `#INCLUDE \"course.module\"` and transpile with `-I kroc/modules/course/libsrc`\n"
}The user doesn't want to proceed with this tool use. The tool use was rejected (eg. if it was a file edit, the new_string was NOT written to the file). STOP what you are doing and wait for the user to tell you how to proceed.