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Source file test/notinheap.go

Documentation: test

     1  // errorcheck -+
     2  
     3  // Copyright 2016 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  // Test type-checking errors for go:notinheap.
     8  
     9  package p
    10  
    11  //go:notinheap
    12  type nih struct{}
    13  
    14  // Types embedding notinheap types must be notinheap.
    15  
    16  type embed1 struct { // ERROR "must be go:notinheap"
    17  	x nih
    18  }
    19  
    20  type embed2 [1]nih // ERROR "must be go:notinheap"
    21  
    22  type embed3 struct { // ERROR "must be go:notinheap"
    23  	x [1]nih
    24  }
    25  
    26  type embed4 map[nih]int // ERROR "go:notinheap map key not allowed"
    27  
    28  type embed5 map[int]nih // ERROR "go:notinheap map value not allowed"
    29  
    30  type emebd6 chan nih // ERROR "chan of go:notinheap type not allowed"
    31  
    32  type okay1 *nih
    33  
    34  type okay2 []nih
    35  
    36  type okay3 func(x nih) nih
    37  
    38  type okay4 interface {
    39  	f(x nih) nih
    40  }
    41  
    42  // Type conversions don't let you sneak past notinheap.
    43  
    44  type t1 struct{ x int }
    45  
    46  //go:notinheap
    47  type t2 t1
    48  
    49  var sink interface{}
    50  
    51  func i() {
    52  	sink = new(t1)                     // no error
    53  	sink = (*t2)(new(t1))              // ERROR "cannot convert(.|\n)*t2 is go:notinheap"
    54  	sink = (*t2)(new(struct{ x int })) // ERROR "cannot convert(.|\n)*t2 is go:notinheap"
    55  }
    56  

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