mirror of
https://github.com/alecthomas/chroma.git
synced 2025-04-13 11:40:29 +02:00
59126c5b32
Add NewLazyLexer and MustNewLazyLexer which accept a function that returns the rules for the lexer. This allows us to defer the rules definitions until they're needed. Lexers in a, g, s, and x packages have been updated to use the new lazy lexer.
81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
package r
|
|
|
|
import (
|
|
. "github.com/alecthomas/chroma" // nolint
|
|
"github.com/alecthomas/chroma/lexers/internal"
|
|
)
|
|
|
|
// Ragel lexer.
|
|
var Ragel = internal.Register(MustNewLazyLexer(
|
|
&Config{
|
|
Name: "Ragel",
|
|
Aliases: []string{"ragel"},
|
|
Filenames: []string{},
|
|
MimeTypes: []string{},
|
|
},
|
|
ragelRules,
|
|
))
|
|
|
|
func ragelRules() Rules {
|
|
return Rules{
|
|
"whitespace": {
|
|
{`\s+`, TextWhitespace, nil},
|
|
},
|
|
"comments": {
|
|
{`\#.*$`, Comment, nil},
|
|
},
|
|
"keywords": {
|
|
{`(access|action|alphtype)\b`, Keyword, nil},
|
|
{`(getkey|write|machine|include)\b`, Keyword, nil},
|
|
{`(any|ascii|extend|alpha|digit|alnum|lower|upper)\b`, Keyword, nil},
|
|
{`(xdigit|cntrl|graph|print|punct|space|zlen|empty)\b`, Keyword, nil},
|
|
},
|
|
"numbers": {
|
|
{`0x[0-9A-Fa-f]+`, LiteralNumberHex, nil},
|
|
{`[+-]?[0-9]+`, LiteralNumberInteger, nil},
|
|
},
|
|
"literals": {
|
|
{`"(\\\\|\\"|[^"])*"`, LiteralString, nil},
|
|
{`'(\\\\|\\'|[^'])*'`, LiteralString, nil},
|
|
{`\[(\\\\|\\\]|[^\]])*\]`, LiteralString, nil},
|
|
{`/(?!\*)(\\\\|\\/|[^/])*/`, LiteralStringRegex, nil},
|
|
},
|
|
"identifiers": {
|
|
{`[a-zA-Z_]\w*`, NameVariable, nil},
|
|
},
|
|
"operators": {
|
|
{`,`, Operator, nil},
|
|
{`\||&|--?`, Operator, nil},
|
|
{`\.|<:|:>>?`, Operator, nil},
|
|
{`:`, Operator, nil},
|
|
{`->`, Operator, nil},
|
|
{`(>|\$|%|<|@|<>)(/|eof\b)`, Operator, nil},
|
|
{`(>|\$|%|<|@|<>)(!|err\b)`, Operator, nil},
|
|
{`(>|\$|%|<|@|<>)(\^|lerr\b)`, Operator, nil},
|
|
{`(>|\$|%|<|@|<>)(~|to\b)`, Operator, nil},
|
|
{`(>|\$|%|<|@|<>)(\*|from\b)`, Operator, nil},
|
|
{`>|@|\$|%`, Operator, nil},
|
|
{`\*|\?|\+|\{[0-9]*,[0-9]*\}`, Operator, nil},
|
|
{`!|\^`, Operator, nil},
|
|
{`\(|\)`, Operator, nil},
|
|
},
|
|
"root": {
|
|
Include("literals"),
|
|
Include("whitespace"),
|
|
Include("comments"),
|
|
Include("keywords"),
|
|
Include("numbers"),
|
|
Include("identifiers"),
|
|
Include("operators"),
|
|
{`\{`, Punctuation, Push("host")},
|
|
{`=`, Operator, nil},
|
|
{`;`, Punctuation, nil},
|
|
},
|
|
"host": {
|
|
{`([^{}\'"/#]+|[^\\]\\[{}]|"(\\\\|\\"|[^"])*"|'(\\\\|\\'|[^'])*'|//.*$\n?|/\*(.|\n)*?\*/|\#.*$\n?|/(?!\*)(\\\\|\\/|[^/])*/|/)+`, Other, nil},
|
|
{`\{`, Punctuation, Push()},
|
|
{`\}`, Punctuation, Pop(1)},
|
|
},
|
|
}
|
|
}
|