25 lines
643 B
Zig
25 lines
643 B
Zig
const expect = @import("std").testing.expect;
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test "defer" {
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var x: i16 = 5;
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{
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defer x += 2;
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try expect(x == 5);
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}
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try expect(x == 7);
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}
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test "multi defer" {
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var x: f32 = 5;
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{
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// When there are multiple defers in a single block, they are executed in reverse order.
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defer x += 2;
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defer x /= 2;
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}
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try expect(x == 4.5);
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}
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// Defer is useful to ensure that resources are cleaned up when they are no longer needed.
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// Instead of needing to remember to manually free up the resource,
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// you can add a defer statement right next to the statement that allocates the resource.
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