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std.meta: allow ArgsTuple to be used on functions with comptime parameters

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any comptime parameter sets `.is_generic` to be true but in many cases these will still be discrete types available in `.params`
This commit is contained in:
Meghan 2023-05-19 12:48:28 -07:00 committed by Veikka Tuominen
parent ccfb0d408d
commit 7077e90b3f
1 changed files with 2 additions and 3 deletions
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5
lib/std/meta.zig
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@ -1037,14 +1037,12 @@ pub fn ArgsTuple(comptime Function: type) type {
@compileError("ArgsTuple expects a function type");
const function_info = info.Fn;
if (function_info.is_generic)
@compileError("Cannot create ArgsTuple for generic function");
if (function_info.is_var_args)
@compileError("Cannot create ArgsTuple for variadic function");
var argument_field_list: [function_info.params.len]type = undefined;
inline for (function_info.params, 0..) |arg, i| {
const T = arg.type.?;
const T = arg.type orelse @compileError("cannot create ArgsTuple for function with an 'anytype' parameter");
argument_field_list[i] = T;
}
@ -1116,6 +1114,7 @@ test "ArgsTuple" {
TupleTester.assertTuple(.{u32}, ArgsTuple(fn (a: u32) []const u8));
TupleTester.assertTuple(.{ u32, f16 }, ArgsTuple(fn (a: u32, b: f16) noreturn));
TupleTester.assertTuple(.{ u32, f16, []const u8, void }, ArgsTuple(fn (a: u32, b: f16, c: []const u8, void) noreturn));
TupleTester.assertTuple(.{u32}, ArgsTuple(fn (comptime a: u32) []const u8));
}
test "Tuple" {