rust/src/test/run-pass/expr-alt.rs

// -*- rust -*-

// Tests for using alt as an expression

fn test_basic() {
  let bool res = alt (true) {
    case (true) {
      true
    }
    case (false) {
      false
    }
  };
  assert (res);

  res = alt(false) {
    case (true) {
      false
    }
    case (false) {
      true
    }
  };
  assert (res);
}

fn test_inferrence() {
  auto res = alt (true) {
    case (true) {
      true
    }
    case (false) {
      false
    }
  };
  assert (res);
}

fn test_alt_as_alt_head() {
  // Yeah, this is kind of confusing ...
  auto res = alt(alt (false) { case (true) { true } case (false) {false} }) {
    case (true) {
      false
    }
    case (false) {
      true
    }
  };
  assert (res);
}

fn test_alt_as_block_result() {
  auto res = alt (false) {
    case (true) {
      false
    }
    case (false) {
      alt (true) {
        case (true) {
          true
        }
        case (false) {
          false
        }
      }
    }
  };
  assert (res);
}

fn main() {
  test_basic();
  test_inferrence();
  test_alt_as_alt_head();
  test_alt_as_block_result();
}