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|
package debug
import (
"fmt"
"os"
)
const (
envAssertPanic = "GO_PROMPT_ENABLE_ASSERT"
)
var (
enableAssert bool
)
func init() {
if e := os.Getenv(envAssertPanic); e == "true" || e == "1" {
enableAssert = true
}
}
// Assert ensures expected condition.
func Assert(cond bool, msg interface{}) {
if cond {
return
}
if enableAssert {
panic(msg)
}
writeWithSync(2, "[ASSERT] "+toString(msg))
}
func toString(v interface{}) string {
switch a := v.(type) {
case func() string:
return a()
case string:
return a
case fmt.Stringer:
return a.String()
default:
return fmt.Sprintf("unexpected type, %t", v)
}
}
// AssertNoError ensures err is nil.
func AssertNoError(err error) {
if err == nil {
return
}
if enableAssert {
panic(err)
}
writeWithSync(2, "[ASSERT] "+err.Error())
}
|
