feat: support unary negation, let/const statements, and expand std syscalls #271
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This commit introduces the unary negation operator (`-`) for expressions,
enables `let` and `const` statement parsing, and expands the standard
library with Linux syscalls and networking modules.
Changes:
- **Unary Negation Support**:
- **AST**: Added `Operator::Neg` to represent the unary minus operator.
- **Parser**: Refactored unary expression parsing to allow the `-`
operator on general expressions, not just numeric literals.
- **Type Inference**: Implemented `get_wave_type` for unary expressions,
ensuring `-` applies to numeric types and `!` results in a boolean.
- **Codegen**: Implemented LLVM IR generation for `Neg` using
`build_int_sub` and `build_float_sub` (subtracting from zero).
- **Parser Enhancements**:
- Registered `let` and `const` keywords in the statement parser to
support local variable and constant declarations.
- **Standard Library Expansion**:
- **Syscalls**: Added `std/sys/linux/syscall.wave` implementing the
`socket` syscall using inline assembly.
- **Networking**: Added `std/net/udp.wave` to provide basic UDP
socket creation.
- **FFI/Libc**: Added `std/libc/c.wave` as a placeholder/documentation
module for C ABI compatibility.
- **Manifest**: Updated `std/manifest.json` to include the new `sys`,
`net`, and `libc` modules.
These updates bridge the gap between high-level syntax (let/const) and
low-level system capabilities (syscalls/FFI).
Signed-off-by: LunaStev <luna@lunastev.org>
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This PR introduces the unary negation operator (
-) to allow negative expressions beyond just literals, integratesletandconstinto the statement parser, and significantly expands the standard library with low-level Linux syscalls and networking capabilities. These updates bridge the gap between high-level language ergonomics and low-level system programming.Key Changes
1. Unary Negation Support (
-)The compiler now supports negating any numeric expression, not just constant literals (e.g.,
-(a + b)).Operator::Negand updated type inference logic to ensure negation applies to numeric types while the logical NOT (!) operator correctly yields a boolean.-prefix for general expressions.0 - xlogic for integers (build_int_sub) and0.0 - xfor floats (build_float_sub).2. Parser Enhancements
letandconstkeywords into the statement parsing loop. This allows for immutable local bindings and constant declarations in a way that matches industry-standard syntax.3. Standard Library (std) Expansion
std/sys/linux/syscall.wave. This module leverages Wave's inline assembly to implement thesocketsyscall directly.std/net/udp.wave, providing a higher-level abstraction for creating UDP sockets using the underlying syscalls.std/libc/c.waveas a foundational module for maintaining C ABI compatibility and FFI documentation.std/manifest.jsonto register the newsys,net, andlibcnamespaces.