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const std = @import("std");
const builtin = @import("builtin");
const testing = std.testing;
const expect = testing.expect;
const expectEqualStrings = testing.expectEqualStrings;
test "tuple declaration type info" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
{
const T = struct { comptime u32 = 1, []const u8 };
const info = @typeInfo(T).@"struct";
try expect(info.layout == .auto);
try expect(info.backing_integer == null);
try expect(info.fields.len == 2);
try expect(info.decls.len == 0);
try expect(info.is_tuple);
try expectEqualStrings(info.fields[0].name, "0");
try expect(info.fields[0].type == u32);
try expect(info.fields[0].defaultValue() == 1);
try expect(info.fields[0].is_comptime);
try expect(info.fields[0].alignment == @alignOf(u32));
try expectEqualStrings(info.fields[1].name, "1");
try expect(info.fields[1].type == []const u8);
try expect(info.fields[1].defaultValue() == null);
try expect(!info.fields[1].is_comptime);
try expect(info.fields[1].alignment == @alignOf([]const u8));
}
}
test "tuple declaration usage" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
const T = struct { u32, []const u8 };
var t: T = .{ 1, "foo" };
_ = &t;
try expect(t[0] == 1);
try expectEqualStrings(t[1], "foo");
const mul = t ** 3;
try expect(@TypeOf(mul) != T);
try expect(mul.len == 6);
try expect(mul[2] == 1);
try expectEqualStrings(mul[3], "foo");
var t2: T = .{ 2, "bar" };
_ = &t2;
const cat = t ++ t2;
try expect(@TypeOf(cat) != T);
try expect(cat.len == 4);
try expect(cat[2] == 2);
try expectEqualStrings(cat[3], "bar");
}
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