72 lines
2.5 KiB
Markdown
72 lines
2.5 KiB
Markdown
# Compiler Roadmap
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A Rust-flavored, C-targeting language - built pipeline-first.
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**Implementation language:** Rust
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**Code generation target:** x86-64 (AT&T / Intel syntax `.s` → assembled via GAS or NASM)
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## Phase 1 - Lexer
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- [x] Define token enum (int literal, bool literal, ident, keywords, operators, punctuation)
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- [x] Implement character-by-character scanner loop
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- [x] Handle whitespace & single-line comments (`//`)
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- [x] Produce source spans (file, line, col) on every token
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- [x] Unit-test: known inputs → expected token streams
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## Phase 2 - Parser
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- [x] Write grammar for the base subset
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- `fn` declarations, `return`, int/bool literals
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- Arithmetic (`+`, `-`, `*`, `/`)
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- [x] Implement recursive-descent parser
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- [x] Attach source spans to every AST node
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- [x] Emit structured parse errors with span info
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- [x] Unit-test: parse valid snippets, expect correct AST shapes
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## Phase 3 - Semantic Analysis
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- [ ] Implement scope-aware symbol table
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- [ ] Name resolution pass - resolve all `Ident` nodes to their declarations
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- [ ] Type inference / checking for `int` and `bool`
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- [ ] Validate function return types match declared signature
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- [ ] Error on use-before-declaration and undeclared symbols
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- [ ] Unit-test: ill-typed programs produce correct diagnostics
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## Phase 4 - x86-64 Code Generation
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- [ ] Design a simple intermediate representation (linear IR, or use AST directly)
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- [ ] Implement stack-frame layout for local variables
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- [ ] Emit System V AMD64 ABI-compliant function prologues / epilogues
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- [ ] Codegen for arithmetic & comparison expressions
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- [ ] Codegen for function calls (argument passing via registers)
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- [ ] Codegen for `return` statements
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- [ ] Output `.s` file, assemble with NASM / GAS
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- [ ] End-to-end test: compile a simple `fn` → run → correct exit code
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## Planned Features (Backlog)
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### Control flow
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- [ ] `if` / `else` branching
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- [ ] `while` loops
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### Types & memory
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- [ ] Typed pointers (`*T`)
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- [ ] Opaque pointers (`*void` / `*opaque`)
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- [ ] Raw pointer arithmetic & dereference
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- [ ] Fixed-size arrays (`[T; N]`)
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- [ ] Slices (`&[T]` / `[]T`)
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### Composite types
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- [ ] Structs & field access
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- [ ] Enums (C-style tagged unions)
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- [ ] Pattern matching (`match` / `switch`)
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### Strings & interop
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- [ ] String literals & `*u8` handling
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- [ ] Variadic functions (for `printf` interop)
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- [ ] `extern` / FFI declarations
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### Tooling & backend
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- [ ] Proper register allocator
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- [ ] Debug info (DWARF)
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- [ ] Standard library bootstrap (`print`, `malloc` wrapper) |