Commit 3525b8778edd235d8d0ad2b55eee83eacd33d5cf | zig

Closes #12907

2 files changed, 28 insertions(+), 2 deletions(-)

src/Sema.zig+15-2

...	...	@@ -8277,8 +8277,21 @@ fn zirParam(
8277	8277	else => \|e\| return e,
8278	8278	}
8279	8279	};
8280		const is_comptime = comptime_syntax or
8281		try sema.typeRequiresComptime(param_ty);
	8280	const is_comptime = sema.typeRequiresComptime(param_ty) catch \|err\| switch (err) {
	8281	error.GenericPoison => {
	8282	// The type is not available until the generic instantiation.
	8283	// We result the param instruction with a poison value and
	8284	// insert an anytype parameter.
	8285	try block.params.append(sema.gpa, .{
	8286	.ty = Type.initTag(.generic_poison),
	8287	.is_comptime = comptime_syntax,
	8288	.name = param_name,
	8289	});
	8290	try sema.inst_map.putNoClobber(sema.gpa, inst, .generic_poison);
	8291	return;
	8292	},
	8293	else => \|e\| return e,
	8294	} or comptime_syntax;
8282	8295	if (sema.inst_map.get(inst)) \|arg\| {
8283	8296	if (is_comptime) {
8284	8297	// We have a comptime value for this parameter so it should be elided from the

test/behavior/generics.zig+13

...	...	@@ -369,3 +369,16 @@ test "extern function used as generic parameter" {
369	369	};
370	370	try expect(S.baz(S.foo) != S.baz(S.bar));
371	371	}
	372
	373	test "generic struct as parameter type" {
	374	const S = struct {
	375	fn doTheTest(comptime Int: type, thing: struct { int: Int }) !void {
	376	try expect(thing.int == 123);
	377	}
	378	fn doTheTest2(comptime Int: type, comptime thing: struct { int: Int }) !void {
	379	try expect(thing.int == 456);
	380	}
	381	};
	382	try S.doTheTest(u32, .{ .int = 123 });
	383	try S.doTheTest2(i32, .{ .int = 456 });
	384	}