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Source file test/notinheap.go

Documentation: test

  // errorcheck -+
  
  // Copyright 2016 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 type-checking errors for go:notinheap.
  
  package p
  
  //go:notinheap
  type nih struct{}
  
  // Types embedding notinheap types must be notinheap.
  
  type embed1 struct { // ERROR "must be go:notinheap"
  	x nih
  }
  
  type embed2 [1]nih // ERROR "must be go:notinheap"
  
  type embed3 struct { // ERROR "must be go:notinheap"
  	x [1]nih
  }
  
  type embed4 map[nih]int // ERROR "go:notinheap map key not allowed"
  
  type embed5 map[int]nih // ERROR "go:notinheap map value not allowed"
  
  type emebd6 chan nih // ERROR "chan of go:notinheap type not allowed"
  
  type okay1 *nih
  
  type okay2 []nih
  
  type okay3 func(x nih) nih
  
  type okay4 interface {
  	f(x nih) nih
  }
  
  // Type conversions don't let you sneak past notinheap.
  
  type t1 struct{ x int }
  
  //go:notinheap
  type t2 t1
  
  var sink interface{}
  
  func i() {
  	sink = new(t1)                     // no error
  	sink = (*t2)(new(t1))              // ERROR "cannot convert(.|\n)*t2 is go:notinheap"
  	sink = (*t2)(new(struct{ x int })) // ERROR "cannot convert(.|\n)*t2 is go:notinheap"
  }
  

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