1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
package file
import (
"fmt"
"strings"
"unicode/utf8"
)
type Error struct {
Location
Message string
Snippet string
}
func (e *Error) Error() string {
return e.format()
}
func (e *Error) Bind(source *Source) *Error {
if snippet, found := source.Snippet(e.Location.Line); found {
snippet := strings.Replace(snippet, "\t", " ", -1)
srcLine := "\n | " + snippet
var bytes = []byte(snippet)
var indLine = "\n | "
for i := 0; i < e.Location.Column && len(bytes) > 0; i++ {
_, sz := utf8.DecodeRune(bytes)
bytes = bytes[sz:]
if sz > 1 {
goto noind
} else {
indLine += "."
}
}
if _, sz := utf8.DecodeRune(bytes); sz > 1 {
goto noind
} else {
indLine += "^"
}
srcLine += indLine
noind:
e.Snippet = srcLine
}
return e
}
func (e *Error) format() string {
if e.Location.Empty() {
return e.Message
}
return fmt.Sprintf(
"%s (%d:%d)%s",
e.Message,
e.Line,
e.Column+1, // add one to the 0-based column for display
e.Snippet,
)
}
|
