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const builtin = @import("builtin");
const std = @import("std");
const testing = std.testing;
const expect = testing.expect;
const expectEqual = testing.expectEqual;
test "tuple concatenation" {
if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
var a: i32 = 1;
var b: i32 = 2;
var x = .{a};
var y = .{b};
var c = x ++ y;
try expectEqual(@as(i32, 1), c[0]);
try expectEqual(@as(i32, 2), c[1]);
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "tuple multiplication" {
if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
{
const t = .{} ** 4;
try expectEqual(0, @typeInfo(@TypeOf(t)).Struct.fields.len);
}
{
const t = .{'a'} ** 4;
try expectEqual(4, @typeInfo(@TypeOf(t)).Struct.fields.len);
inline for (t) |x| try expectEqual('a', x);
}
{
const t = .{ 1, 2, 3 } ** 4;
try expectEqual(12, @typeInfo(@TypeOf(t)).Struct.fields.len);
inline for (t) |x, i| try expectEqual(1 + i % 3, x);
}
}
};
try S.doTheTest();
comptime try S.doTheTest();
const T = struct {
fn consume_tuple(tuple: anytype, len: usize) !void {
try expect(tuple.len == len);
}
fn doTheTest() !void {
const t1 = .{};
var rt_var: u8 = 42;
const t2 = .{rt_var} ++ .{};
try expect(t2.len == 1);
try expect(t2.@"0" == rt_var);
try expect(t2.@"0" == 42);
try expect(&t2.@"0" != &rt_var);
try consume_tuple(t1 ++ t1, 0);
try consume_tuple(.{} ++ .{}, 0);
try consume_tuple(.{0} ++ .{}, 1);
try consume_tuple(.{0} ++ .{1}, 2);
try consume_tuple(.{ 0, 1, 2 } ++ .{ u8, 1, noreturn }, 6);
try consume_tuple(t2 ++ t1, 1);
try consume_tuple(t1 ++ t2, 1);
try consume_tuple(t2 ++ t2, 2);
try consume_tuple(.{rt_var} ++ .{}, 1);
try consume_tuple(.{rt_var} ++ t1, 1);
try consume_tuple(.{} ++ .{rt_var}, 1);
try consume_tuple(t2 ++ .{void}, 2);
try consume_tuple(t2 ++ .{0}, 2);
try consume_tuple(.{0} ++ t2, 2);
try consume_tuple(.{void} ++ t2, 2);
try consume_tuple(.{u8} ++ .{rt_var} ++ .{true}, 3);
}
};
try T.doTheTest();
comptime try T.doTheTest();
}
test "pass tuple to comptime var parameter" {
if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO
const S = struct {
fn Foo(comptime args: anytype) !void {
try expect(args[0] == 1);
}
fn doTheTest() !void {
try Foo(.{1});
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "tuple initializer for var" {
if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() void {
const Bytes = struct {
id: usize,
};
var tmp = .{
.id = @as(usize, 2),
.name = Bytes{ .id = 20 },
};
_ = tmp;
}
};
S.doTheTest();
comptime S.doTheTest();
}
test "array-like initializer for tuple types" {
if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO
const T = @Type(std.builtin.TypeInfo{
.Struct = std.builtin.TypeInfo.Struct{
.is_tuple = true,
.layout = .Auto,
.decls = &[_]std.builtin.TypeInfo.Declaration{},
.fields = &[_]std.builtin.TypeInfo.StructField{
.{
.name = "0",
.field_type = i32,
.default_value = @as(?i32, null),
.is_comptime = false,
.alignment = @alignOf(i32),
},
.{
.name = "1",
.field_type = u8,
.default_value = @as(?i32, null),
.is_comptime = false,
.alignment = @alignOf(i32),
},
},
},
});
const S = struct {
fn doTheTest() !void {
var obj: T = .{ -1234, 128 };
try testing.expectEqual(@as(i32, -1234), obj[0]);
try testing.expectEqual(@as(u8, 128), obj[1]);
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
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