func (self *_parser) error(place interface{}, msg string, msgValues ...interface{}) *Error {
idx := file.Idx(0)
switch place := place.(type) {
case int:
idx = self.idxOf(place)
case file.Idx:
if place == 0 {
idx = self.idxOf(self.chrOffset)
} else {
idx = place
}
default:
panic(fmt.Errorf("error(%T, ...)", place))
}
position := self.position(idx)
msg = fmt.Sprintf(msg, msgValues...)
lines := strings.Split(self.str, "\n")
var line string
if len(lines) >= position.Line-1 {
line = "\r\n" + lines[position.Line-1]
line += "\r\n"
var i int
for {
if i == position.Column-1 {
break
}
line += "~"
i++
}
line += "^"
}
self.errors.Add(position, msg, line)
return self.errors[len(self.errors)-1]
}
func (self *_parser) errorUnexpectedToken(tkn token.Token) error {
switch tkn {
case token.EOF:
return self.error(file.Idx(0), err_UnexpectedEndOfInput)
}
value := tkn.String()
switch tkn {
case token.BOOLEAN, token.NULL:
value = self.literal
case token.IDENTIFIER:
return self.error(self.idx, "Unexpected identifier")
case token.KEYWORD:
// TODO Might be a future reserved word
return self.error(self.idx, "Unexpected reserved word")
case token.NUMBER:
return self.error(self.idx, "Unexpected number")
case token.STRING:
return self.error(self.idx, "Unexpected string")
}
return self.error(self.idx, err_UnexpectedToken, value)
}
func (self *VariableExpression) Idx1() file.Idx {
if self.Initializer == nil {
return file.Idx(int(self.Idx) + len(self.Name) + 1)
}
return self.Initializer.Idx1()
}
func (self *StringLiteral) Idx1() file.Idx { return file.Idx(int(self.Idx) + len(self.Literal)) }
func (self *RegExpLiteral) Idx1() file.Idx { return file.Idx(int(self.Idx) + len(self.Literal)) }
func (self *NumberLiteral) Idx1() file.Idx { return file.Idx(int(self.Idx) + len(self.Literal)) }
func (self *NullLiteral) Idx1() file.Idx { return file.Idx(int(self.Idx) + 4) } // "null"
func (self *Identifier) Idx1() file.Idx { return file.Idx(int(self.Idx) + len(self.Name)) }
func (self *BooleanLiteral) Idx1() file.Idx { return file.Idx(int(self.Idx) + len(self.Literal)) }
func (self *_parser) idxOf(offset int) file.Idx {
return file.Idx(self.base + offset)
}