31 lines
636 B
Zig
31 lines
636 B
Zig
const assert = @import("std").debug.assert;
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var read_count: u64 = 0;
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fn readOnce() anyerror!u64 {
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read_count += 1;
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return read_count;
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}
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const FormValue = union(enum) {
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Address: u64,
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Other: bool,
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};
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fn doThing(form_id: u64) anyerror!FormValue {
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return switch (form_id) {
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17 => FormValue{ .Address = try readOnce() },
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else => error.InvalidDebugInfo,
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};
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}
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test "switch prong returns error enum" {
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switch (doThing(17) catch unreachable) {
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FormValue.Address => |payload| {
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assert(payload == 1);
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},
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else => unreachable,
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}
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assert(read_count == 1);
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}
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