44 lines
911 B
Zig
44 lines
911 B
Zig
const assert = @import("std").debug.assert;
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test "try on error union" {
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tryOnErrorUnionImpl();
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comptime tryOnErrorUnionImpl();
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}
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fn tryOnErrorUnionImpl() void {
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const x = if (returnsTen()) |val| val + 1 else |err| switch (err) {
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error.ItBroke, error.NoMem => 1,
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error.CrappedOut => i32(2),
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else => unreachable,
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};
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assert(x == 11);
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}
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fn returnsTen() error!i32 {
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return 10;
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}
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test "try without vars" {
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const result1 = if (failIfTrue(true)) 1 else |_| i32(2);
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assert(result1 == 2);
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const result2 = if (failIfTrue(false)) 1 else |_| i32(2);
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assert(result2 == 1);
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}
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fn failIfTrue(ok: bool) error!void {
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if (ok) {
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return error.ItBroke;
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} else {
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return;
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}
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}
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test "try then not executed with assignment" {
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if (failIfTrue(true)) {
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unreachable;
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} else |err| {
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assert(err == error.ItBroke);
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}
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}
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