1package e
 2
 3import (
 4	. "github.com/alecthomas/chroma" // nolint
 5	"github.com/alecthomas/chroma/lexers/internal"
 6)
 7
 8// Ebnf lexer.
 9var Ebnf = internal.Register(MustNewLexer(
10	&Config{
11		Name:      "EBNF",
12		Aliases:   []string{"ebnf"},
13		Filenames: []string{"*.ebnf"},
14		MimeTypes: []string{"text/x-ebnf"},
15	},
16	Rules{
17		"root": {
18			Include("whitespace"),
19			Include("comment_start"),
20			Include("identifier"),
21			{`=`, Operator, Push("production")},
22		},
23		"production": {
24			Include("whitespace"),
25			Include("comment_start"),
26			Include("identifier"),
27			{`"[^"]*"`, LiteralStringDouble, nil},
28			{`'[^']*'`, LiteralStringSingle, nil},
29			{`(\?[^?]*\?)`, NameEntity, nil},
30			{`[\[\]{}(),|]`, Punctuation, nil},
31			{`-`, Operator, nil},
32			{`;`, Punctuation, Pop(1)},
33			{`\.`, Punctuation, Pop(1)},
34		},
35		"whitespace": {
36			{`\s+`, Text, nil},
37		},
38		"comment_start": {
39			{`\(\*`, CommentMultiline, Push("comment")},
40		},
41		"comment": {
42			{`[^*)]`, CommentMultiline, nil},
43			Include("comment_start"),
44			{`\*\)`, CommentMultiline, Pop(1)},
45			{`[*)]`, CommentMultiline, nil},
46		},
47		"identifier": {
48			{`([a-zA-Z][\w \-]*)`, Keyword, nil},
49		},
50	},
51))