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Source file test/cmplx.go

Documentation: test

     1  // errorcheck
     2  
     3  // Copyright 2010 The Go Authors. All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  // Verify that incorrect invocations of the complex predeclared function are detected.
     8  // Does not compile.
     9  
    10  package main
    11  
    12  type (
    13  	Float32    float32
    14  	Float64    float64
    15  	Complex64  complex64
    16  	Complex128 complex128
    17  )
    18  
    19  var (
    20  	f32 float32
    21  	f64 float64
    22  	F32 Float32
    23  	F64 Float64
    24  
    25  	c64  complex64
    26  	c128 complex128
    27  	C64  Complex64
    28  	C128 Complex128
    29  )
    30  
    31  func F1() int {
    32  	return 1
    33  }
    34  
    35  func F3() (int, int, int) {
    36  	return 1, 2, 3
    37  }
    38  
    39  func main() {
    40  	// ok
    41  	c64 = complex(f32, f32)
    42  	c128 = complex(f64, f64)
    43  
    44  	_ = complex128(0)     // ok
    45  	_ = complex(f32, f64) // ERROR "complex"
    46  	_ = complex(f64, f32) // ERROR "complex"
    47  	_ = complex(f32, F32) // ERROR "complex"
    48  	_ = complex(F32, f32) // ERROR "complex"
    49  	_ = complex(f64, F64) // ERROR "complex"
    50  	_ = complex(F64, f64) // ERROR "complex"
    51  
    52  	_ = complex(F1()) // ERROR "expects two arguments.*returns 1"
    53  	_ = complex(F3()) // ERROR "expects two arguments.*returns 3"
    54  
    55  	_ = complex() // ERROR "missing argument"
    56  
    57  	c128 = complex(f32, f32) // ERROR "cannot use"
    58  	c64 = complex(f64, f64)  // ERROR "cannot use"
    59  
    60  	c64 = complex(1.0, 2.0) // ok, constant is untyped
    61  	c128 = complex(1.0, 2.0)
    62  	C64 = complex(1.0, 2.0)
    63  	C128 = complex(1.0, 2.0)
    64  
    65  	C64 = complex(f32, f32)  // ERROR "cannot use"
    66  	C128 = complex(f64, f64) // ERROR "cannot use"
    67  
    68  }
    69  

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