gtsocial-umbx

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error.go (1902B)

      1 package ast
      2 
      3 import (
      4     `fmt`
      5     `strings`
      6     `unsafe`
      7 
      8     `github.com/bytedance/sonic/internal/native/types`
      9 )
     10 
     11 func (self *Parser) syntaxError(err types.ParsingError) SyntaxError {
     12     return SyntaxError{
     13         Pos : self.p,
     14         Src : self.s,
     15         Code: err,
     16     }
     17 }
     18 
     19 func newSyntaxError(err SyntaxError) *Node {
     20     msg := err.Description()
     21     return &Node{
     22         t: V_ERROR,
     23         v: int64(err.Code),
     24         p: unsafe.Pointer(&msg),
     25     }
     26 }
     27 
     28 type SyntaxError struct {
     29     Pos  int
     30     Src  string
     31     Code types.ParsingError
     32     Msg  string
     33 }
     34 
     35 func (self SyntaxError) Error() string {
     36     return fmt.Sprintf("%q", self.Description())
     37 }
     38 
     39 func (self SyntaxError) Description() string {
     40     return "Syntax error " + self.description()
     41 }
     42 
     43 func (self SyntaxError) description() string {
     44     i := 16
     45     p := self.Pos - i
     46     q := self.Pos + i
     47 
     48     /* check for empty source */
     49     if self.Src == "" {
     50         return fmt.Sprintf("no sources available: %#v", self)
     51     }
     52 
     53     /* prevent slicing before the beginning */
     54     if p < 0 {
     55         p, q, i = 0, q - p, i + p
     56     }
     57 
     58     /* prevent slicing beyond the end */
     59     if n := len(self.Src); q > n {
     60         n = q - n
     61         q = len(self.Src)
     62 
     63         /* move the left bound if possible */
     64         if p > n {
     65             i += n
     66             p -= n
     67         }
     68     }
     69 
     70     /* left and right length */
     71     x := clamp_zero(i)
     72     y := clamp_zero(q - p - i - 1)
     73 
     74     /* compose the error description */
     75     return fmt.Sprintf(
     76         "at index %d: %s\n\n\t%s\n\t%s^%s\n",
     77         self.Pos,
     78         self.Message(),
     79         self.Src[p:q],
     80         strings.Repeat(".", x),
     81         strings.Repeat(".", y),
     82     )
     83 }
     84 
     85 func (self SyntaxError) Message() string {
     86     if self.Msg == "" {
     87         return self.Code.Message()
     88     }
     89     return self.Msg
     90 }
     91 
     92 func clamp_zero(v int) int {
     93     if v < 0 {
     94         return 0
     95     } else {
     96         return v
     97     }
     98 }