309f48e1b5
extractTypeParam's slice arm only extracted from slice-typed args, so first(a) with a : [3]s64 at first :: (xs: []$T) -> T left T unbound and the mono body reached LLVM emission carrying the .unresolved sentinel (panic). The arm now also extracts from array args via the array's element type — mirroring the array→slice promotion concrete slice params already perform; the existing arg coercion handles the rest. lowerGenericCall additionally diagnoses any still-uninferrable TYPE param at the call site instead of monomorphizing unbound — the deliberate string-at-[]$T gap used to hit the same sentinel panic and now errors with a source-located message. Comptime value params ($N: u32) and ..$Ts packs bind through their own dispatch and stay exempt. Regressions: examples/0212-generics-array-arg-slice-param.sx (scalar / u8 / struct elements + the slice spelling) and examples/1168-diagnostics-generic-param-uninferrable.sx (string arg diagnostic) — both failed pre-fix.
20 lines
587 B
Plaintext
20 lines
587 B
Plaintext
// A direct call to a generic fn whose arguments cannot bind a TYPE
|
|
// param diagnoses at the call site instead of monomorphizing with the
|
|
// param unbound. A `string` arg at a `[]$T` param is the canonical
|
|
// uninferrable shape (string deliberately does not bind `[]$T`); it
|
|
// used to stamp `.unresolved` through the body and PANIC the compiler
|
|
// at LLVM emission via the sentinel tripwire.
|
|
//
|
|
// Regression (issue 0126, diagnostic half).
|
|
|
|
#import "modules/std.sx";
|
|
|
|
first :: (xs: []$T) -> T {
|
|
return xs[0];
|
|
}
|
|
|
|
main :: () -> s32 {
|
|
print("{}\n", first("abc"));
|
|
return 0;
|
|
}
|