81669c72b7
REIFY Phase 0.0. Add the comptime type-metaprogramming surface as the
on-demand module modules/std/meta.sx (NOT the prelude — declaring its
data types in always-loaded core.sx interns them into every module's
type table and shifts every .ir snapshot):
- EnumVariant / EnumInfo / TypeInfo data types. TypeInfo's variant uses
the backtick raw escape `enum so it reads as the keyword.
- reify / type_info / field_type as bodyless #builtin decls.
Each builtin bails LOUDLY when reached unimplemented (no silent default):
- reify(...) in a :: type-alias position -> decl.zig .call branch
(also the Phase 0.2 construction hook); poisons the alias .unresolved.
- reify / field_type in any other type position ->
generic.zig resolveTypeCallWithBindings.
- type_info(...) in expression position -> call.zig tryLowerReflectionCall.
Unit test src/parser.test.zig (registered in root.zig) locks that the
decls parse. zig build test green (447 unit, 669 examples).
74 lines
3.0 KiB
Plaintext
74 lines
3.0 KiB
Plaintext
// The compiler-coupled prelude primitives: #builtin declarations, the libc
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// escape hatch, and the types the compiler resolves by NAME program-wide
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// (`Context`, `Allocator`, `Into`, `Source_Location`, `string`). Consumers
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// never import this file directly — std.sx re-exports every name here.
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Vector :: ($N: int, $T: Type) -> Type #builtin;
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out :: (str: string) -> void #builtin;
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// sqrt :: (x: $T) -> T #builtin;
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// sin :: (x: $T) -> T #builtin;
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// cos :: (x: $T) -> T #builtin;
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size_of :: ($T: Type) -> i64 #builtin;
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align_of :: ($T: Type) -> i64 #builtin;
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// Low-level libc bindings, used by allocator implementations to avoid
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// recursing through `context.allocator`. The bare `malloc`/`free`
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// spellings are NOT declared: the Allocator protocol + the std/mem.sx
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// helpers are the allocation surface (`free` is the typed slice helper
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// there). Raw libc escape hatch: `libc_malloc` / `libc_free`.
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libc_malloc :: (size: i64) -> *void extern libc "malloc";
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libc_free :: (ptr: *void) -> void extern libc "free";
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memcpy :: (dst: *void, src: *void, size: i64) -> *void extern libc "memcpy";
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memset :: (dst: *void, val: i64, size: i64) -> void extern libc "memset";
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type_of :: (val: $T) -> Type #builtin;
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type_name :: ($T: Type) -> string #builtin;
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field_count :: ($T: Type) -> i64 #builtin;
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field_name :: ($T: Type, idx: i64) -> string #builtin;
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field_value :: (s: $T, idx: i64) -> Any #builtin;
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is_flags :: ($T: Type) -> bool #builtin;
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type_is_unsigned :: ($T: Type) -> bool #builtin;
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field_value_int :: ($T: Type, idx: i64) -> i64 #builtin;
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field_index :: ($T: Type, val: T) -> i64 #builtin;
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error_tag_name :: (e: $T) -> string #builtin;
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// Comptime type metaprogramming (`type_info` / `reify` / `field_type`) lives in
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// the on-demand `modules/std/meta.sx`, NOT here — declaring its data types in
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// the always-loaded prelude would intern them into every module's type table
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// and shift every `.ir` snapshot. Import `modules/std/meta.sx` to use reify.
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// Call-site location, synthesized by the `#caller_location` directive when it
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// is a parameter's default value (ERR E4.1b). `process.exit` / `assert` use it
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// to report where they were invoked.
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Source_Location :: struct {
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file: string;
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line: i32;
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col: i32;
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func: string;
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}
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string :: []u8 #builtin;
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// --- Allocator protocol (impls live in std/mem.sx) ---
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// Bytes-level primitives carry the `_bytes` suffix so the typed
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// helpers in std/mem.sx own the bare names (`alloc(T, n)`, `free(s)`).
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Allocator :: protocol #inline {
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alloc_bytes :: (size: i64) -> *void;
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dealloc_bytes :: (ptr: *void);
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}
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// --- Context ---
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Context :: struct {
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allocator: Allocator;
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data: *void;
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}
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// User-space `xx` extension. `xx val : T` where the built-in conversion
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// ladder makes no progress falls through to an `impl Into(T) for Source`
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// lookup; the compiler monomorphises `convert` for the (Source, T) pair
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// and emits a direct call. Compile-time only — no vtable, no runtime
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// dispatch.
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Into :: protocol(Target: Type) {
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convert :: () -> Target;
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}
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