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
59
60
61
|
package driver
import (
"io"
mldriver "github.com/nihei9/maleeni/driver"
spec "github.com/nihei9/vartan/spec/grammar"
)
type vToken struct {
terminalID int
tok *mldriver.Token
}
func (t *vToken) TerminalID() int {
return t.terminalID
}
func (t *vToken) Lexeme() []byte {
return t.tok.Lexeme
}
func (t *vToken) EOF() bool {
return t.tok.EOF
}
func (t *vToken) Invalid() bool {
return t.tok.Invalid
}
func (t *vToken) Position() (int, int) {
return t.tok.Row, t.tok.Col
}
type tokenStream struct {
lex *mldriver.Lexer
kindToTerminal []int
}
func NewTokenStream(g *spec.CompiledGrammar, src io.Reader) (TokenStream, error) {
lex, err := mldriver.NewLexer(mldriver.NewLexSpec(g.LexicalSpecification.Maleeni.Spec), src)
if err != nil {
return nil, err
}
return &tokenStream{
lex: lex,
kindToTerminal: g.LexicalSpecification.Maleeni.KindToTerminal,
}, nil
}
func (l *tokenStream) Next() (VToken, error) {
tok, err := l.lex.Next()
if err != nil {
return nil, err
}
return &vToken{
terminalID: l.kindToTerminal[tok.KindID],
tok: tok,
}, nil
}
|
