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const builtin = @import("builtin");
const std = @import("std");
const expect = std.testing.expect;
const expectEqual = std.testing.expectEqual;
const expectError = std.testing.expectError;
test "break and continue inside loop inside defer expression" {
testBreakContInDefer(10);
comptime testBreakContInDefer(10);
}
fn testBreakContInDefer(x: usize) void {
defer {
var i: usize = 0;
while (i < x) : (i += 1) {
if (i < 5) continue;
if (i == 5) break;
}
expect(i == 5) catch @panic("test failure");
}
}
test "defer and labeled break" {
var i = @as(usize, 0);
blk: {
defer i += 1;
break :blk;
}
try expect(i == 1);
}
test "errdefer does not apply to fn inside fn" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
if (testNestedFnErrDefer()) |_| @panic("expected error") else |e| try expect(e == error.Bad);
}
fn testNestedFnErrDefer() anyerror!void {
var a: i32 = 0;
errdefer a += 1;
const S = struct {
fn baz() anyerror {
return error.Bad;
}
};
return S.baz();
}
test "return variable while defer expression in scope to modify it" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
try expect(notNull().? == 1);
}
fn notNull() ?u8 {
var res: ?u8 = 1;
defer res = null;
return res;
}
};
try S.doTheTest();
try comptime S.doTheTest();
}
var result: [3]u8 = undefined;
var index: usize = undefined;
fn runSomeErrorDefers(x: bool) !bool {
index = 0;
defer {
result[index] = 'a';
index += 1;
}
errdefer {
result[index] = 'b';
index += 1;
}
defer {
result[index] = 'c';
index += 1;
}
return if (x) x else error.FalseNotAllowed;
}
test "mixing normal and error defers" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
try expect(runSomeErrorDefers(true) catch unreachable);
try expect(result[0] == 'c');
try expect(result[1] == 'a');
const ok = runSomeErrorDefers(false) catch |err| x: {
try expect(err == error.FalseNotAllowed);
break :x true;
};
try expect(ok);
try expect(result[0] == 'c');
try expect(result[1] == 'b');
try expect(result[2] == 'a');
}
test "errdefer with payload" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
const S = struct {
fn foo() !i32 {
errdefer |a| {
expectEqual(error.One, a) catch @panic("test failure");
}
return error.One;
}
fn doTheTest() !void {
try expectError(error.One, foo());
}
};
try S.doTheTest();
try comptime S.doTheTest();
}
test "reference to errdefer payload" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest; // TODO
const S = struct {
fn foo() !i32 {
errdefer |a| {
const ptr = &a;
const ptr2 = &ptr;
expectEqual(error.One, ptr2.*.*) catch @panic("test failure");
expectEqual(error.One, ptr.*) catch @panic("test failure");
}
return error.One;
}
fn doTheTest() !void {
try expectError(error.One, foo());
}
};
try S.doTheTest();
try comptime S.doTheTest();
}
test "simple else prong doesn't emit an error for unreachable else prong" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
const S = struct {
fn foo() error{Foo}!void {
return error.Foo;
}
};
var a: u32 = 0;
defer a += 1;
S.foo() catch |err| switch (err) {
error.Foo => a += 1,
else => |e| return e,
};
try expect(a == 1);
}
test "errdefer used in function that doesn't return an error" {
const S = struct {
fn foo() u8 {
var a: u8 = 5;
errdefer a += 1;
return a;
}
};
try expect(S.foo() == 5);
}
// Originally reported at https://github.com/ziglang/zig/issues/10591
const defer_assign = switch (block: {
var x = 0;
defer x = 1;
break :block x;
}) {
else => |i| i,
};
comptime {
if (defer_assign != 0) @compileError("defer_assign failed!");
}
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