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Sema: rewrite semantic analysis of function calls

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This rewrite improves some error messages, hugely simplifies the logic,
and fixes several bugs. One of these bugs is technically a new rule
which Andrew and I agreed on: if a parameter has a comptime-only type
but is not declared `comptime`, then the corresponding call argument
should not be *evaluated* at comptime; only resolved. Implementing this
required changing how function types work a little, which in turn
required allowing a new kind of function coercion for some generic use
cases: function coercions are now allowed to implicitly *remove*
`comptime` annotations from parameters with comptime-only types. This is
okay because removing the annotation affects only the call site.

Resolves: #22262
This commit is contained in:
mlugg
2025-01-05 05:27:48 +00:00
parent 3f95003d4c
commit e9bd2d45d4
36 changed files with 842 additions and 1221 deletions
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6
test/cases/compile_errors/recursive_inline_fn.zig
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@@ -29,8 +29,10 @@ pub export fn entry2() void {
}
// error
// backend=stage2
// target=native
//
// :5:27: error: inline call is recursive
// :12:12: note: called from here
// :24:10: error: inline call is recursive
// :20:10: note: called from here
// :16:11: note: called from here
// :28:10: note: called from here