72 lines
3.8 KiB
Markdown
72 lines
3.8 KiB
Markdown
# language features
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## IMPLEMENTED
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### source and declarations
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- newline-terminated statements and `#` comments
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- immutable `::` bindings, mutable function-local `=` bindings, and `_` sinks
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- immutable and mutable locals
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- package-level globals and functions
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- interned identifiers
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### types and expressions
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- exact-width `i8` through `i64`, `u8` through `u64`, `f32`, `f64`, `isize`, `usize`, `void`, and inferred integer-constrained `int`
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- target-dependent atomic C primitives from `c_char` through `c_longdouble`
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- C primitives remain semantically distinct from exact-width Brolang primitives until target lowering
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- contextual integer literals and constant folding of addition and negation trees
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- strict numeric conversions, checked integer addition, and unary negation
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- arrays `[N]T`, sentinel arrays `[N;S]T`, single-item pointers `@T`, many-item pointers `*T`, sentinel many-item pointers `[*;S]T`, pointer offsets, slices, and explicit slicing
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- immutable UTF-8 string literals typed as pointers to static sentinel arrays: `@[N;0]u8`
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- pointer-to-array `.len`, indexing, and slicing without explicit dereference
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- arrays expose `.len` but not `.ptr`; slices and pointers-to-arrays expose `.ptr` and preserve sentinel information when available
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- information-preserving and information-forgetting pointer-to-array decay and sentinel slice/pointer weakening; array values never implicitly decay
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- narrow immutable zero-terminated byte pointer conversion to `*c_char` and `[*;0]c_char`, without general `u8`/`c_char` interchange
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- optionals with trapping postfix `?`, `orelse`, and nullable pointer representation
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- source-order native structs, defined or opaque `c_struct`, and keyed record literals
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- complete plain imported C structs and unions as runtime values; incomplete or unsupported-layout records remain pointer-only
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- C function pointer types as pointer-sized runtime values, including manual `*c_func(...) T` spelling and nullable imported callback typedefs
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- postfix pointer dereference, general writable locations, function calls, assignments, and returns
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### functions and packages
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- demand-monomorphized functions
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- bodyful `c_func` definitions using the c calling convention
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- bodyless `c_func` declarations with exact, globally unique external symbol names
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- concrete-only foreign signatures
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- Apple Silicon C ABI scalar, pointer, and fixed-signature plain record/union lowering, including narrow integer extension attributes
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- directory packages with merged declarations
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- file-local relative imports, aliases, and qualified member access
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- relative `.h` imports as synthetic package namespaces
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- transitive external C function prototypes, typedef chains, C scalars, fixed arrays, complete plain records/unions, and pointers to opaque C records
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- bodyless manual and imported C variadic declarations with target-aware default argument promotions
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- passing concrete `c_func` declarations/definitions as C callback values and calling non-null C function pointers with postfix call syntax
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- reference-time diagnostics for unsupported imported C declarations
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### compiler behavior
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- error-tolerant compilation with runtime diagnostic traps
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- lazy semantic checking of demanded function specializations
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- demand-driven LLVM declarations for referenced foreign functions
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- ordered linking of additional c sources, objects, and libraries
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- replaceable dynamically loaded libclang C-import backend
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- per-compilation C-header import caching by canonical path, target, ordered include paths, and ordered defines
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- static, eager runtime, and deferred problematic globals
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## PLANNED
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### foreign functions and linking
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- exporting brolang functions to c
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### scalar and compound types
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- tuples and native variadic functions
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- C enums and non-plain C record layouts
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### advanced c imports
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- C enums, external variables, macros, and static inline functions
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- additional target-specific C ABI lowering
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