74 lines
1.8 KiB
Zig
74 lines
1.8 KiB
Zig
const expectEqual = @import("std").testing.expectEqual;
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const FILE = extern struct {
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dummy_field: u8,
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};
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extern fn printf([*c]const u8, ...) c_int;
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extern fn fputs([*c]const u8, noalias [*c]FILE) c_int;
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extern fn ftell([*c]FILE) c_long;
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extern fn fopen([*c]const u8, [*c]const u8) [*c]FILE;
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const S = extern struct {
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state: c_short,
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extern fn s_do_thing([*c]S, b: c_int) c_short;
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};
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test "Extern function calls in @TypeOf" {
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const Test = struct {
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fn test_fn_1(a: anytype, b: anytype) @TypeOf(printf("%d %s\n", a, b)) {
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return 0;
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}
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fn test_fn_2(a: anytype) @TypeOf((S{ .state = 0 }).s_do_thing(a)) {
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return 1;
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}
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fn doTheTest() !void {
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try expectEqual(c_int, @TypeOf(test_fn_1(0, 42)));
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try expectEqual(c_short, @TypeOf(test_fn_2(0)));
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}
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};
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try Test.doTheTest();
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comptime try Test.doTheTest();
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}
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test "Peer resolution of extern function calls in @TypeOf" {
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const Test = struct {
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fn test_fn() @TypeOf(ftell(null), fputs(null, null)) {
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return 0;
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}
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fn doTheTest() !void {
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try expectEqual(c_long, @TypeOf(test_fn()));
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}
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};
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try Test.doTheTest();
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comptime try Test.doTheTest();
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}
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test "Extern function calls, dereferences and field access in @TypeOf" {
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const Test = struct {
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fn test_fn_1(a: c_long) @TypeOf(fopen("test", "r").*) {
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_ = a;
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return .{ .dummy_field = 0 };
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}
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fn test_fn_2(a: anytype) @TypeOf(fopen("test", "r").*.dummy_field) {
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_ = a;
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return 255;
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}
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fn doTheTest() !void {
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try expectEqual(FILE, @TypeOf(test_fn_1(0)));
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try expectEqual(u8, @TypeOf(test_fn_2(0)));
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}
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};
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try Test.doTheTest();
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comptime try Test.doTheTest();
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}
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