c0e1a5db82
A bare reserved-type-name `::` declaration was silently accepted, and the
attempt-2 lowerCall rewrite then made a bare `s2 :: (…) {…}` function callable —
bypassing the backtick rule for handwritten sx. The reserved-name binding check
covered `:=` / typed-local / param / captures but NOT the `::` declaration form.
- ast: `ConstDecl`/`FnDecl` carry `is_raw` + `name_span` threaded from the parser
(parseConstBinding / parseFnDecl, all call sites incl. struct/impl methods).
- semantic_diagnostics: reject a bare reserved spelling at EVERY declaration-name
site — const, function (incl. struct/impl methods), struct/enum/union/error-set,
protocol, foreign-class, ufcs alias, namespaced/library/c-import name. Backtick
(`is_raw`) and the compiler's `#builtin` definition (`string :: []u8 #builtin`)
are the only exemptions; a value whose node is itself a named decl defers to
that node's own check.
- c_import: synthesized foreign fn_decls are `is_raw = true`, so a C function
whose own name collides with a reserved spelling (`int s2(int);`) imports and
bare-calls unedited.
- lower: scope the `.type_expr`→`.identifier` call rewrite to a callee FnDecl of
RAW provenance (`is_raw`) — only a backtick / `#import c` foreign fn can carry a
reserved-name spelling, so a non-raw match never gets rewritten.
- examples: 0153 (positive — backtick `::` const + fn, bare + tick call), 1140
(negative — bare `::` const + fn rejected).
- docs: specs.md + readme.md state the backtick is required at every binding site
including `::` const / function / type declarations; issue 0089 banner updated.
24 lines
924 B
Plaintext
24 lines
924 B
Plaintext
// Backtick raw-identifier escape at the `::` declaration sites: a leading
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// backtick makes a CONSTANT name and a FUNCTION name raw, so a reserved type
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// spelling (`s2`, `u8`) can be declared and used. Complements examples/0151
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// (var / param / field / global). The backtick fn is callable both via the
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// backtick (`` `u8(5) ``) and bare (`u8(5)`) — the bare reserved-name callee
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// resolves to the raw fn because its declaration is raw (issue 0089). A *bare*
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// `s2 :: …` / `u8 :: …` declaration is still the reserved-name error (see
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// examples/1140).
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// Regression (issue 0089).
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#import "modules/std.sx";
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// Constant whose name is a reserved type spelling.
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`s2 :: 2.5;
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// Function whose name is a reserved type spelling.
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`u8 :: (n: s64) -> s64 { return n + 7; }
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main :: () -> s32 {
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print("const = {}\n", `s2);
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print("fn tick = {}\n", `u8(5));
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print("fn bare = {}\n", u8(5));
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return 0;
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}
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