99 lines
1.9 KiB
Go
99 lines
1.9 KiB
Go
|
package ast
|
||
|
|
|
||
|
|
import (
|
||
|
|
`fmt`
|
||
|
|
`strings`
|
||
|
|
`unsafe`
|
||
|
|
|
||
|
|
`github.com/bytedance/sonic/internal/native/types`
|
||
|
|
)
|
||
|
|
|
||
|
|
func (self *Parser) syntaxError(err types.ParsingError) SyntaxError {
|
||
|
|
return SyntaxError{
|
||
|
|
Pos : self.p,
|
||
|
|
Src : self.s,
|
||
|
|
Code: err,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func newSyntaxError(err SyntaxError) *Node {
|
||
|
|
msg := err.Description()
|
||
|
|
return &Node{
|
||
|
|
t: V_ERROR,
|
||
|
|
v: int64(err.Code),
|
||
|
|
p: unsafe.Pointer(&msg),
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
type SyntaxError struct {
|
||
|
|
Pos int
|
||
|
|
Src string
|
||
|
|
Code types.ParsingError
|
||
|
|
Msg string
|
||
|
|
}
|
||
|
|
|
||
|
|
func (self SyntaxError) Error() string {
|
||
|
|
return fmt.Sprintf("%q", self.Description())
|
||
|
|
}
|
||
|
|
|
||
|
|
func (self SyntaxError) Description() string {
|
||
|
|
return "Syntax error " + self.description()
|
||
|
|
}
|
||
|
|
|
||
|
|
func (self SyntaxError) description() string {
|
||
|
|
i := 16
|
||
|
|
p := self.Pos - i
|
||
|
|
q := self.Pos + i
|
||
|
|
|
||
|
|
/* check for empty source */
|
||
|
|
if self.Src == "" {
|
||
|
|
return fmt.Sprintf("no sources available: %#v", self)
|
||
|
|
}
|
||
|
|
|
||
|
|
/* prevent slicing before the beginning */
|
||
|
|
if p < 0 {
|
||
|
|
p, q, i = 0, q - p, i + p
|
||
|
|
}
|
||
|
|
|
||
|
|
/* prevent slicing beyond the end */
|
||
|
|
if n := len(self.Src); q > n {
|
||
|
|
n = q - n
|
||
|
|
q = len(self.Src)
|
||
|
|
|
||
|
|
/* move the left bound if possible */
|
||
|
|
if p > n {
|
||
|
|
i += n
|
||
|
|
p -= n
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* left and right length */
|
||
|
|
x := clamp_zero(i)
|
||
|
|
y := clamp_zero(q - p - i - 1)
|
||
|
|
|
||
|
|
/* compose the error description */
|
||
|
|
return fmt.Sprintf(
|
||
|
|
"at index %d: %s\n\n\t%s\n\t%s^%s\n",
|
||
|
|
self.Pos,
|
||
|
|
self.Message(),
|
||
|
|
self.Src[p:q],
|
||
|
|
strings.Repeat(".", x),
|
||
|
|
strings.Repeat(".", y),
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (self SyntaxError) Message() string {
|
||
|
|
if self.Msg == "" {
|
||
|
|
return self.Code.Message()
|
||
|
|
}
|
||
|
|
return self.Msg
|
||
|
|
}
|
||
|
|
|
||
|
|
func clamp_zero(v int) int {
|
||
|
|
if v < 0 {
|
||
|
|
return 0
|
||
|
|
} else {
|
||
|
|
return v
|
||
|
|
}
|
||
|
|
}
|