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![Keith Randall](/assets/img/avatar_default.png)
The code to do the conversion is smaller than the call to the runtime. The 1-result asserts need to call panic if they fail, but that code is out of line. The only conversions left in the runtime are those which might allocate and those which might need to generate an itab. Given the following types: type E interface{} type I interface { foo() } type I2 iterface { foo(); bar() } type Big [10]int func (b Big) foo() { ... } This CL inlines the following conversions: was assertE2T var e E = ... b := i.(Big) was assertE2T2 var e E = ... b, ok := i.(Big) was assertI2T var i I = ... b := i.(Big) was assertI2T2 var i I = ... b, ok := i.(Big) was assertI2E var i I = ... e := i.(E) was assertI2E2 var i I = ... e, ok := i.(E) These are the remaining runtime calls: convT2E: var b Big = ... var e E = b convT2I: var b Big = ... var i I = b convI2I: var i2 I2 = ... var i I = i2 assertE2I: var e E = ... i := e.(I) assertE2I2: var e E = ... i, ok := e.(I) assertI2I: var i I = ... i2 := i.(I2) assertI2I2: var i I = ... i2, ok := i.(I2) Fixes #17405 Fixes #8422 Change-Id: Ida2367bf8ce3cd2c6bb599a1814f1d275afabe21 Reviewed-on: https://go-review.googlesource.com/32313 Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by: David Chase <drchase@google.com>
75 lines
1.8 KiB
Go
75 lines
1.8 KiB
Go
// errorcheck -0 -d=typeassert
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package p
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func assertptr(x interface{}) *int {
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return x.(*int) // ERROR "type assertion inlined"
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}
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func assertptr2(x interface{}) (*int, bool) {
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z, ok := x.(*int) // ERROR "type assertion inlined"
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return z, ok
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}
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func assertfunc(x interface{}) func() {
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return x.(func()) // ERROR "type assertion inlined"
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}
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func assertfunc2(x interface{}) (func(), bool) {
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z, ok := x.(func()) // ERROR "type assertion inlined"
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return z, ok
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}
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func assertstruct(x interface{}) struct{ *int } {
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return x.(struct{ *int }) // ERROR "type assertion inlined"
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}
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func assertstruct2(x interface{}) (struct{ *int }, bool) {
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z, ok := x.(struct{ *int }) // ERROR "type assertion inlined"
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return z, ok
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}
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func assertbig(x interface{}) complex128 {
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return x.(complex128) // ERROR "type assertion inlined"
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}
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func assertbig2(x interface{}) (complex128, bool) {
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z, ok := x.(complex128) // ERROR "type assertion inlined"
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return z, ok
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}
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func assertbig2ok(x interface{}) (complex128, bool) {
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_, ok := x.(complex128) // ERROR "type assertion inlined"
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return 0, ok
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}
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func assertslice(x interface{}) []int {
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return x.([]int) // ERROR "type assertion inlined"
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}
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func assertslice2(x interface{}) ([]int, bool) {
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z, ok := x.([]int) // ERROR "type assertion inlined"
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return z, ok
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}
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func assertslice2ok(x interface{}) ([]int, bool) {
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_, ok := x.([]int) // ERROR "type assertion inlined"
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return nil, ok
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}
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type I interface {
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foo()
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}
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func assertInter(x interface{}) I {
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return x.(I) // ERROR "type assertion not inlined"
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}
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func assertInter2(x interface{}) (I, bool) {
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z, ok := x.(I) // ERROR "type assertion not inlined"
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return z, ok
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}
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