blob: 371ddec12eaf3c7aab0df42bd72b947d352ee9cd (
plain) (
blame)
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
|
package spec
import "fmt"
type SyntaxError struct {
message string
}
func newSyntaxError(message string) *SyntaxError {
return &SyntaxError{
message: message,
}
}
func (e *SyntaxError) Error() string {
return fmt.Sprintf("syntax error: %s", e.message)
}
var (
// lexical errors
synErrUnclosedTerminal = newSyntaxError("unclosed terminal")
synErrInvalidEscSeq = newSyntaxError("invalid escape sequence")
synErrIncompletedEscSeq = newSyntaxError("incompleted escape sequence; unexpected EOF following \\")
// syntax errors
synErrInvalidToken = newSyntaxError("invalid token")
synErrNoProduction = newSyntaxError("a grammar must have at least one production")
synErrNoProductionName = newSyntaxError("a production name is missing")
synErrNoColon = newSyntaxError("the colon must precede alternatives")
synErrNoSemicolon = newSyntaxError("the semicolon is missing at the last of an alternative")
synErrNoModifierName = newSyntaxError("a modifier needs a name")
synErrNoActionName = newSyntaxError("an action needs a name")
synErrFragmentNoPattern = newSyntaxError("a fragment needs one pattern element")
)
|
