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const expect = @import("std").testing.expect;
const builtin = @import("builtin");
test "@fieldParentPtr non-first field" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
try testParentFieldPtr(&foo.c);
try comptime testParentFieldPtr(&foo.c);
}
test "@fieldParentPtr first field" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
try testParentFieldPtrFirst(&foo.a);
try comptime testParentFieldPtrFirst(&foo.a);
}
const Foo = struct {
a: bool,
b: f32,
c: i32,
d: i32,
};
const foo = Foo{
.a = true,
.b = 0.123,
.c = 1234,
.d = -10,
};
fn testParentFieldPtr(c: *const i32) !void {
try expect(c == &foo.c);
const base = @fieldParentPtr(Foo, "c", c);
try expect(base == &foo);
try expect(&base.c == c);
}
fn testParentFieldPtrFirst(a: *const bool) !void {
try expect(a == &foo.a);
const base = @fieldParentPtr(Foo, "a", a);
try expect(base == &foo);
try expect(&base.a == a);
}
test "@fieldParentPtr untagged union" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
try testFieldParentPtrUnion(&bar.c);
try comptime testFieldParentPtrUnion(&bar.c);
}
const Bar = union(enum) {
a: bool,
b: f32,
c: i32,
d: i32,
};
const bar = Bar{ .c = 42 };
fn testFieldParentPtrUnion(c: *const i32) !void {
try expect(c == &bar.c);
const base = @fieldParentPtr(Bar, "c", c);
try expect(base == &bar);
try expect(&base.c == c);
}
test "@fieldParentPtr tagged union" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
try testFieldParentPtrTaggedUnion(&bar_tagged.c);
try comptime testFieldParentPtrTaggedUnion(&bar_tagged.c);
}
const BarTagged = union(enum) {
a: bool,
b: f32,
c: i32,
d: i32,
};
const bar_tagged = BarTagged{ .c = 42 };
fn testFieldParentPtrTaggedUnion(c: *const i32) !void {
try expect(c == &bar_tagged.c);
const base = @fieldParentPtr(BarTagged, "c", c);
try expect(base == &bar_tagged);
try expect(&base.c == c);
}
test "@fieldParentPtr extern union" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
try testFieldParentPtrExternUnion(&bar_extern.c);
try comptime testFieldParentPtrExternUnion(&bar_extern.c);
}
const BarExtern = extern union {
a: bool,
b: f32,
c: i32,
d: i32,
};
const bar_extern = BarExtern{ .c = 42 };
fn testFieldParentPtrExternUnion(c: *const i32) !void {
try expect(c == &bar_extern.c);
const base = @fieldParentPtr(BarExtern, "c", c);
try expect(base == &bar_extern);
try expect(&base.c == c);
}
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