coolguy
4624c6d0ec
std 는 예약된 이름이고 프로그램이 아니라 컴파일러와 함께 있으므로 자기 루트를 갖는다 (--std=). 본문 없는 선언은 링커가 찾을 것 -- 런타임이나 C 라이브러리 -- 이므로 IR 에 extern 으로 나간다. 런타임에 write/alloc/free/exit 를 넣었다. 이것이 표준 라이브러리가 스스로 말할 수 없는 전부이고 나머지는 Ferro 로 쓴다. @trap @unreachable @size_of @align_of @line 을 내린다. 링크 이름에서 점과 괄호를 걸렀다. 유닛 경로에는 점이 있고 제네릭 인스턴스에는 괄호가 있는데 어셈블러가 받지 않는다.
64 lines
2.6 KiB
C
64 lines
2.6 KiB
C
#ifndef FE_RESOLVE_H
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#define FE_RESOLVE_H
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#include "ast.h"
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#include "diag.h"
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/* Unit-level resolution: identity, import bindings, and the unit graph.
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This runs between parsing and semantic checking. It answers questions that
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need more than one file -- what a unit is called, what it imports, and
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whether those imports exist and terminate -- so that check.c can keep
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looking at one function at a time. */
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/* SPEC 8.1: each segment is ASCII lowercase, starts with a letter, continues
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with letters, digits or '_', and is at most eight characters. The limit is
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what makes a unit path map to a FAT/DOS 8.3 source path unambiguously. */
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#define FE_UNIT_SEGMENT_MAX 8
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#define FE_UNIT_PATH_MAX 128
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#define FE_BUILD_UNIT_MAX 64
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typedef struct FeUnit {
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char name[FE_UNIT_PATH_MAX]; /* canonical dotted path */
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char path[260]; /* source file it was read from */
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FeAst ast;
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char *source; /* owned; freed with the build */
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unsigned long size;
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int loaded;
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int checked;
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} FeUnit;
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typedef struct FeBuild {
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FeUnit units[FE_BUILD_UNIT_MAX];
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unsigned count;
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char root[260]; /* import root: where unit paths start */
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/* Where `std.*` is looked for. The standard library is not under the
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program's root -- it ships with the compiler. */
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char std_root[260];
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FeDiags *diags;
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} FeBuild;
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/* Validate the `unit` declaration against SPEC 8.1, and against the file it was
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read from: the path must match the dotted name, so `game.world.map` has to
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come from `game/world/map.fe`. `source_path` may be null to skip that half.
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Returns non-zero when the unit is well formed. */
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int fe_resolve_unit_identity(FeAst *ast, FeDiags *diags, const char *source_path);
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/* Load `entry` and everything it imports, transitively.
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The import root is derived from the entry file: a unit named `a.b` read from
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`<root>/a/b.fe` fixes `<root>`, so a sibling `import c.d;` is looked for at
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`<root>/c/d.fe`. Reports missing imports, import cycles, and binding
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conflicts. Returns non-zero when the whole graph loaded cleanly. */
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int fe_build_load(FeBuild *build, const char *entry, FeDiags *diags,
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const char *std_root);
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void fe_build_destroy(FeBuild *build);
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/* The unit a binding refers to inside `unit`, or null.
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The binding is the last segment of the import path unless `as` renamed it. */
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FeUnit *fe_build_binding(FeBuild *build, FeUnit *unit, const char *binding);
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/* The local name an import introduces: its alias, or the last path segment. */
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const char *fe_import_binding(const FeNode *import);
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#endif
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