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Richard Smith
59ff7743c0
The design of choice types expects the declaration of an alternative to match the usage: if an alternative is declared as `None`, then it should be used as `None` not `None()`, and if it is declared as `None()` then it should be used as `None()` not `None`. Update explorer to match. Also clean up the handling of choice types and alternative values a little in general, by moving away from identifying choice types and alternatives as strings and towards identifying them symbolically. Closes #2422
45 lines
968 B
Plaintext
45 lines
968 B
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// AUTOUPDATE
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// RUN: %{explorer-run}
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// RUN: %{explorer-run-trace}
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// CHECK:STDOUT: result: 1
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package ExplorerTest api;
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choice Ints {
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None,
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One(i32),
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Two(i32, i32)
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}
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// Test some alternate syntaxes
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choice MoreInts {
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None(),
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One(i32),
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Two(i32, i32),
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}
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fn Main() -> i32 {
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var x: Ints = Ints.None;
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var y: Ints = Ints.One(42);
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var z: MoreInts = MoreInts.None();
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var n: i32 = 0;
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match (y) {
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case Ints.None => { n = n + 2; }
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case Ints.One(x: auto) => { n = x + 1 - 42; }
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case Ints.Two(a: auto, b: auto) => { n = 2; }
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}
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match (x) {
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case Ints.One(x: auto) => { n = x + 2; }
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case Ints.None => { n = n - 1; }
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case Ints.Two(x: auto, y: auto) => { n = 5; }
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}
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match (z) {
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case MoreInts.None() => { ++n; }
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}
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return n;
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}
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