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runtime: print error when panicking with error interface type

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This commit is contained in:
Ayke van Laethem
2019-04-24 15:35:27 +02:00
committed by Ron Evans
parent 0fd90c49cc
commit 024eceb476
1 changed files with 40 additions and 0 deletions
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src/runtime/print.go
+40
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@@ -4,6 +4,10 @@ import (
"unsafe" "unsafe"
) )
type stringer interface {
String() string
}
//go:nobounds //go:nobounds
func printstring(s string) { func printstring(s string) {
for i := 0; i < len(s); i++ { for i := 0; i < len(s); i++ {
@@ -199,8 +203,44 @@ func printnl() {
func printitf(msg interface{}) { func printitf(msg interface{}) {
switch msg := msg.(type) { switch msg := msg.(type) {
case bool:
print(msg)
case int:
print(msg)
case int8:
print(msg)
case int16:
print(msg)
case int32:
print(msg)
case int64:
print(msg)
case uint:
print(msg)
case uint8:
print(msg)
case uint16:
print(msg)
case uint32:
print(msg)
case uint64:
print(msg)
case uintptr:
print(msg)
case float32:
print(msg)
case float64:
print(msg)
case complex64:
print(msg)
case complex128:
print(msg)
case string: case string:
print(msg) print(msg)
case error:
print(msg.Error())
case stringer:
print(msg.String())
default: default:
// cast to underlying type // cast to underlying type
itf := *(*_interface)(unsafe.Pointer(&msg)) itf := *(*_interface)(unsafe.Pointer(&msg))