mirror of
https://github.com/ziglang/zig.git
synced 2024-11-27 15:42:49 +00:00
f26dda2117
Most of this migration was performed automatically with `zig fmt`. There were a few exceptions which I had to manually fix: * `@alignCast` and `@addrSpaceCast` cannot be automatically rewritten * `@truncate`'s fixup is incorrect for vectors * Test cases are not formatted, and their error locations change
79 lines
2.1 KiB
Zig
79 lines
2.1 KiB
Zig
const std = @import("std");
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const builtin = @import("builtin");
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const expect = std.testing.expect;
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test "truncate u0 to larger integer allowed and has comptime-known result" {
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var x: u0 = 0;
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const y = @as(u8, @truncate(x));
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try comptime expect(y == 0);
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}
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test "truncate.u0.literal" {
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var z = @as(u0, @truncate(0));
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try expect(z == 0);
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}
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test "truncate.u0.const" {
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const c0: usize = 0;
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var z = @as(u0, @truncate(c0));
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try expect(z == 0);
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}
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test "truncate.u0.var" {
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var d: u8 = 2;
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var z = @as(u0, @truncate(d));
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try expect(z == 0);
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}
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test "truncate i0 to larger integer allowed and has comptime-known result" {
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var x: i0 = 0;
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const y = @as(i8, @truncate(x));
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try comptime expect(y == 0);
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}
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test "truncate.i0.literal" {
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var z = @as(i0, @truncate(0));
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try expect(z == 0);
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}
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test "truncate.i0.const" {
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const c0: isize = 0;
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var z = @as(i0, @truncate(c0));
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try expect(z == 0);
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}
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test "truncate.i0.var" {
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var d: i8 = 2;
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var z = @as(i0, @truncate(d));
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try expect(z == 0);
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}
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test "truncate on comptime integer" {
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var x = @as(u16, @truncate(9999));
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try expect(x == 9999);
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var y = @as(u16, @truncate(-21555));
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try expect(y == 0xabcd);
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var z = @as(i16, @truncate(-65537));
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try expect(z == -1);
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var w = @as(u1, @truncate(1 << 100));
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try expect(w == 0);
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}
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test "truncate on vectors" {
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if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
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if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
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if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
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if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
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if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
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const S = struct {
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fn doTheTest() !void {
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var v1: @Vector(4, u16) = .{ 0xaabb, 0xccdd, 0xeeff, 0x1122 };
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var v2: @Vector(4, u8) = @truncate(v1);
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try expect(std.mem.eql(u8, &@as([4]u8, v2), &[4]u8{ 0xbb, 0xdd, 0xff, 0x22 }));
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}
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};
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try comptime S.doTheTest();
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try S.doTheTest();
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}
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