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Sema: fix implicit cast from extern fn to fn ptr

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Closes #12570
This commit is contained in:
Veikka Tuominen 2022-08-22 10:54:07 +03:00
parent b0bcd4add2
commit 560baf67ce
2 changed files with 22 additions and 1 deletions
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2
src/Sema.zig
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@ -22564,7 +22564,7 @@ fn coerceExtra(
// Function body to function pointer.
if (inst_ty.zigTypeTag() == .Fn) {
const fn_val = try sema.resolveConstValue(block, .unneeded, inst, undefined);
const fn_decl = fn_val.castTag(.function).?.data.owner_decl;
const fn_decl = fn_val.pointerDecl().?;
const inst_as_ptr = try sema.analyzeDeclRef(fn_decl);
return sema.coerce(block, dest_ty, inst_as_ptr, inst_src);
}

21
test/behavior/fn.zig
View File

@ -422,3 +422,24 @@ test "import passed byref to function in return type" {
var list = S.get();
try expect(list.items.len == 0);
}
test "implicit cast function to function ptr" {
if (builtin.zig_backend == .stage1) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
const S1 = struct {
export fn someFunctionThatReturnsAValue() c_int {
return 123;
}
};
var fnPtr1: *const fn () callconv(.C) c_int = S1.someFunctionThatReturnsAValue;
try expect(fnPtr1() == 123);
const S2 = struct {
extern fn someFunctionThatReturnsAValue() c_int;
};
var fnPtr2: *const fn () callconv(.C) c_int = S2.someFunctionThatReturnsAValue;
try expect(fnPtr2() == 123);
}