| // run |
| |
| // Copyright 2017 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. |
| |
| package main |
| |
| import "fmt" |
| |
| // issue 17446 |
| const ( |
| _ = real(0) // from bug report |
| _ = imag(0) // from bug report |
| |
| // same as above, but exported for #43891 |
| Real0 = real(0) |
| Imag0 = imag(0) |
| |
| // if the arguments are untyped, the results must be untyped |
| // (and compatible with types that can represent the values) |
| _ int = real(1) |
| _ int = real('a') |
| _ int = real(2.0) |
| _ int = real(3i) |
| |
| _ float32 = real(1) |
| _ float32 = real('a') |
| _ float32 = real(2.1) |
| _ float32 = real(3.2i) |
| |
| _ float64 = real(1) |
| _ float64 = real('a') |
| _ float64 = real(2.1) |
| _ float64 = real(3.2i) |
| |
| _ int = imag(1) |
| _ int = imag('a') |
| _ int = imag(2.1 + 3i) |
| _ int = imag(3i) |
| |
| _ float32 = imag(1) |
| _ float32 = imag('a') |
| _ float32 = imag(2.1 + 3.1i) |
| _ float32 = imag(3i) |
| |
| _ float64 = imag(1) |
| _ float64 = imag('a') |
| _ float64 = imag(2.1 + 3.1i) |
| _ float64 = imag(3i) |
| ) |
| |
| var tests = []struct { |
| code string |
| got, want interface{} |
| }{ |
| {"real(1)", real(1), 1.0}, |
| {"real('a')", real('a'), float64('a')}, |
| {"real(2.0)", real(2.0), 2.0}, |
| {"real(3.2i)", real(3.2i), 0.0}, |
| |
| {"imag(1)", imag(1), 0.0}, |
| {"imag('a')", imag('a'), 0.0}, |
| {"imag(2.1 + 3.1i)", imag(2.1 + 3.1i), 3.1}, |
| {"imag(3i)", imag(3i), 3.0}, |
| } |
| |
| func main() { |
| // verify compile-time evaluated constant expressions |
| for _, test := range tests { |
| if test.got != test.want { |
| panic(fmt.Sprintf("%s: %v (%T) != %v (%T)", test.code, test.got, test.got, test.want, test.want)) |
| } |
| } |
| } |
