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|
package otto
import (
"errors"
"fmt"
"github.com/robertkrimen/otto/ast"
)
type _exception struct {
value interface{}
}
func newException(value interface{}) *_exception {
return &_exception{
value: value,
}
}
func (self *_exception) eject() interface{} {
value := self.value
self.value = nil // Prevent Go from holding on to the value, whatever it is
return value
}
type _error struct {
Name string
Message string
Line int // Hackish -- line where the error/exception occurred
}
var messageDetail map[string]string = map[string]string{
"notDefined": "%v is not defined",
}
func messageFromDescription(description string, argumentList ...interface{}) string {
message := messageDetail[description]
if message == "" {
message = description
}
message = fmt.Sprintf(message, argumentList...)
return message
}
func (self _error) MessageValue() Value {
if self.Message == "" {
return UndefinedValue()
}
return toValue_string(self.Message)
}
func (self _error) String() string {
if len(self.Name) == 0 {
return self.Message
}
if len(self.Message) == 0 {
return self.Name
}
return fmt.Sprintf("%s: %s", self.Name, self.Message)
}
func newError(name string, argumentList ...interface{}) _error {
description := ""
var node ast.Node = nil
length := len(argumentList)
if length > 0 {
if node, _ = argumentList[length-1].(ast.Node); node != nil || argumentList[length-1] == nil {
argumentList = argumentList[0 : length-1]
length -= 1
}
if length > 0 {
description, argumentList = argumentList[0].(string), argumentList[1:]
}
}
return _error{
Name: name,
Message: messageFromDescription(description, argumentList...),
Line: -1,
}
//error := _error{
// Name: name,
// Message: messageFromDescription(description, argumentList...),
// Line: -1,
//}
//if node != nil {
// error.Line = ast.position()
//}
//return error
}
func newReferenceError(argumentList ...interface{}) _error {
return newError("ReferenceError", argumentList...)
}
func newTypeError(argumentList ...interface{}) _error {
return newError("TypeError", argumentList...)
}
func newRangeError(argumentList ...interface{}) _error {
return newError("RangeError", argumentList...)
}
func newSyntaxError(argumentList ...interface{}) _error {
return newError("SyntaxError", argumentList...)
}
func newURIError(argumentList ...interface{}) _error {
return newError("URIError", argumentList...)
}
func typeErrorResult(throw bool) bool {
if throw {
panic(newTypeError())
}
return false
}
func catchPanic(function func()) (err error) {
// FIXME
defer func() {
if caught := recover(); caught != nil {
if exception, ok := caught.(*_exception); ok {
caught = exception.eject()
}
switch caught := caught.(type) {
//case *_syntaxError:
// err = errors.New(fmt.Sprintf("%s (line %d)", caught.String(), caught.Line+0))
// return
case _error:
if caught.Line == -1 {
err = errors.New(caught.String())
} else {
// We're 0-based (for now), hence the + 1
err = errors.New(fmt.Sprintf("%s (line %d)", caught.String(), caught.Line+1))
}
return
case Value:
err = errors.New(toString(caught))
return
//case string:
// if strings.HasPrefix(caught, "SyntaxError:") {
// err = errors.New(caught)
// return
// }
}
panic(caught)
}
}()
function()
return nil
}
|
