67 lines
2.0 KiB
Go
67 lines
2.0 KiB
Go
package r
|
|
|
|
import (
|
|
. "github.com/alecthomas/chroma" // nolint
|
|
"github.com/alecthomas/chroma/lexers/internal"
|
|
)
|
|
|
|
// R/S lexer.
|
|
var R = internal.Register(MustNewLexer(
|
|
&Config{
|
|
Name: "R",
|
|
Aliases: []string{"splus", "s", "r"},
|
|
Filenames: []string{"*.S", "*.R", "*.r", ".Rhistory", ".Rprofile", ".Renviron"},
|
|
MimeTypes: []string{"text/S-plus", "text/S", "text/x-r-source", "text/x-r", "text/x-R", "text/x-r-history", "text/x-r-profile"},
|
|
},
|
|
Rules{
|
|
"comments": {
|
|
{`#.*$`, CommentSingle, nil},
|
|
},
|
|
"valid_name": {
|
|
{"(?:`[^`\\\\]*(?:\\\\.[^`\\\\]*)*`)|(?:(?:[a-zA-z]|[_.][^0-9])[\\w_.]*)", Name, nil},
|
|
},
|
|
"punctuation": {
|
|
{`\[{1,2}|\]{1,2}|\(|\)|;|,`, Punctuation, nil},
|
|
},
|
|
"keywords": {
|
|
{`(if|else|for|while|repeat|in|next|break|return|switch|function)(?![\w.])`, KeywordReserved, nil},
|
|
},
|
|
"operators": {
|
|
{`<<?-|->>?|-|==|<=|>=|<|>|&&?|!=|\|\|?|\?`, Operator, nil},
|
|
{`\*|\+|\^|/|!|%[^%]*%|=|~|\$|@|:{1,3}`, Operator, nil},
|
|
},
|
|
"builtin_symbols": {
|
|
{`(NULL|NA(_(integer|real|complex|character)_)?|letters|LETTERS|Inf|TRUE|FALSE|NaN|pi|\.\.(\.|[0-9]+))(?![\w.])`, KeywordConstant, nil},
|
|
{`(T|F)\b`, NameBuiltinPseudo, nil},
|
|
},
|
|
"numbers": {
|
|
{`0[xX][a-fA-F0-9]+([pP][0-9]+)?[Li]?`, LiteralNumberHex, nil},
|
|
{`[+-]?([0-9]+(\.[0-9]+)?|\.[0-9]+|\.)([eE][+-]?[0-9]+)?[Li]?`, LiteralNumber, nil},
|
|
},
|
|
"statements": {
|
|
Include("comments"),
|
|
{`\s+`, Text, nil},
|
|
{`\'`, LiteralString, Push("string_squote")},
|
|
{`\"`, LiteralString, Push("string_dquote")},
|
|
Include("builtin_symbols"),
|
|
Include("valid_name"),
|
|
Include("numbers"),
|
|
Include("keywords"),
|
|
Include("punctuation"),
|
|
Include("operators"),
|
|
},
|
|
"root": {
|
|
{"((?:`[^`\\\\]*(?:\\\\.[^`\\\\]*)*`)|(?:(?:[a-zA-z]|[_.][^0-9])[\\w_.]*))\\s*(?=\\()", NameFunction, nil},
|
|
Include("statements"),
|
|
{`\{|\}`, Punctuation, nil},
|
|
{`.`, Text, nil},
|
|
},
|
|
"string_squote": {
|
|
{`([^\'\\]|\\.)*\'`, LiteralString, Pop(1)},
|
|
},
|
|
"string_dquote": {
|
|
{`([^"\\]|\\.)*"`, LiteralString, Pop(1)},
|
|
},
|
|
},
|
|
))
|