// run | |

// Copyright 2022 The Go Authors. All rights reserved. | |

// Use of this source code is governed by a BSD-style | |

// license that can be found in the LICENSE file. | |

// Test that the compiler's noder uses the correct type | |

// for RHS shift operands that are untyped. Must compile; | |

// run for good measure. | |

package main | |

import ( | |

"fmt" | |

"math" | |

) | |

func f(x, y int) { | |

if x != y { | |

panic(fmt.Sprintf("%d != %d", x, y)) | |

} | |

} | |

func main() { | |

var x int = 1 | |

f(x<<1, 2) | |

f(x<<1., 2) | |

f(x<<(1+0i), 2) | |

f(x<<0i, 1) | |

f(x<<(1<<x), 4) | |

f(x<<(1.<<x), 4) | |

f(x<<((1+0i)<<x), 4) | |

f(x<<(0i<<x), 1) | |

// corner cases | |

const M = math.MaxUint | |

f(x<<(M+0), 0) // shift by untyped int representable as uint | |

f(x<<(M+0.), 0) // shift by untyped float representable as uint | |

f(x<<(M+0.+0i), 0) // shift by untyped complex representable as uint | |

} |