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Source file test/escape_struct_return.go

Documentation: test

  // errorcheck -0 -m -l
  
  // Copyright 2015 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 escape analysis for function parameters.
  
  package foo
  
  var Ssink *string
  
  type U struct {
  	_sp  *string
  	_spp **string
  }
  
  func A(sp *string, spp **string) U { // ERROR "leaking param: sp to result ~r2 level=0$" "leaking param: spp to result ~r2 level=0$"
  	return U{sp, spp}
  }
  
  func B(spp **string) U { // ERROR "leaking param: spp to result ~r1 level=0$" "leaking param: spp to result ~r1 level=1$"
  	return U{*spp, spp}
  }
  
  func tA1() {
  	s := "cat"
  	sp := &s   // ERROR "tA1 &s does not escape$"
  	spp := &sp // ERROR "tA1 &sp does not escape$"
  	u := A(sp, spp)
  	_ = u
  	println(s)
  }
  
  func tA2() {
  	s := "cat"
  	sp := &s   // ERROR "tA2 &s does not escape$"
  	spp := &sp // ERROR "tA2 &sp does not escape$"
  	u := A(sp, spp)
  	println(*u._sp)
  }
  
  func tA3() {
  	s := "cat"
  	sp := &s   // ERROR "tA3 &s does not escape$"
  	spp := &sp // ERROR "tA3 &sp does not escape$"
  	u := A(sp, spp)
  	println(**u._spp)
  }
  
  func tB1() {
  	s := "cat"
  	sp := &s   // ERROR "tB1 &s does not escape$"
  	spp := &sp // ERROR "tB1 &sp does not escape$"
  	u := B(spp)
  	_ = u
  	println(s)
  }
  
  func tB2() {
  	s := "cat"
  	sp := &s   // ERROR "tB2 &s does not escape$"
  	spp := &sp // ERROR "tB2 &sp does not escape$"
  	u := B(spp)
  	println(*u._sp)
  }
  
  func tB3() {
  	s := "cat"
  	sp := &s   // ERROR "tB3 &s does not escape$"
  	spp := &sp // ERROR "tB3 &sp does not escape$"
  	u := B(spp)
  	println(**u._spp)
  }
  

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