mirror of
https://github.com/ziglang/zig.git
synced 2024-12-14 15:20:13 +00:00
43 lines
909 B
Zig
43 lines
909 B
Zig
const std = @import("std");
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const Allocator = std.mem.Allocator;
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const Foo = struct {
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data: u32,
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};
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fn tryToAllocateFoo(allocator: Allocator) !*Foo {
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return allocator.create(Foo);
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}
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fn deallocateFoo(allocator: Allocator, foo: *Foo) void {
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allocator.destroy(foo);
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}
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fn getFooData() !u32 {
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return 666;
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}
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fn createFoo(allocator: Allocator, param: i32) !*Foo {
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const foo = getFoo: {
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var foo = try tryToAllocateFoo(allocator);
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errdefer deallocateFoo(allocator, foo);
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foo.data = try getFooData();
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break :getFoo foo;
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};
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// This lasts for the rest of the function
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errdefer deallocateFoo(allocator, foo);
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// Error is now properly handled by errdefer
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if (param > 1337) return error.InvalidParam;
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return foo;
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}
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test "createFoo" {
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try std.testing.expectError(error.InvalidParam, createFoo(std.testing.allocator, 2468));
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}
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// test
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