1package c
2
3import (
4 . "github.com/alecthomas/chroma" // nolint
5 "github.com/alecthomas/chroma/lexers/internal"
6)
7
8// C lexer.
9var C = internal.Register(MustNewLexer(
10 &Config{
11 Name: "C",
12 Aliases: []string{"c"},
13 Filenames: []string{"*.c", "*.h", "*.idc"},
14 MimeTypes: []string{"text/x-chdr", "text/x-csrc"},
15 },
16 Rules{
17 "whitespace": {
18 {`^#if\s+0`, CommentPreproc, Push("if0")},
19 {`^#`, CommentPreproc, Push("macro")},
20 {`^(\s*(?:/[*].*?[*]/\s*)?)(#if\s+0)`, ByGroups(UsingSelf("root"), CommentPreproc), Push("if0")},
21 {`^(\s*(?:/[*].*?[*]/\s*)?)(#)`, ByGroups(UsingSelf("root"), CommentPreproc), Push("macro")},
22 {`\n`, Text, nil},
23 {`\s+`, Text, nil},
24 {`\\\n`, Text, nil},
25 {`//(\n|[\w\W]*?[^\\]\n)`, CommentSingle, nil},
26 {`/(\\\n)?[*][\w\W]*?[*](\\\n)?/`, CommentMultiline, nil},
27 {`/(\\\n)?[*][\w\W]*`, CommentMultiline, nil},
28 },
29 "statements": {
30 {`(L?)(")`, ByGroups(LiteralStringAffix, LiteralString), Push("string")},
31 {`(L?)(')(\\.|\\[0-7]{1,3}|\\x[a-fA-F0-9]{1,2}|[^\\\'\n])(')`, ByGroups(LiteralStringAffix, LiteralStringChar, LiteralStringChar, LiteralStringChar), nil},
32 {`(\d+\.\d*|\.\d+|\d+)[eE][+-]?\d+[LlUu]*`, LiteralNumberFloat, nil},
33 {`(\d+\.\d*|\.\d+|\d+[fF])[fF]?`, LiteralNumberFloat, nil},
34 {`0x[0-9a-fA-F]+[LlUu]*`, LiteralNumberHex, nil},
35 {`0[0-7]+[LlUu]*`, LiteralNumberOct, nil},
36 {`\d+[LlUu]*`, LiteralNumberInteger, nil},
37 {`\*/`, Error, nil},
38 {`[~!%^&*+=|?:<>/-]`, Operator, nil},
39 {`[()\[\],.]`, Punctuation, nil},
40 {Words(``, `\b`, `asm`, `auto`, `break`, `case`, `const`, `continue`, `default`, `do`, `else`, `enum`, `extern`, `for`, `goto`, `if`, `register`, `restricted`, `return`, `sizeof`, `static`, `struct`, `switch`, `typedef`, `union`, `volatile`, `while`), Keyword, nil},
41 {`(bool|int|long|float|short|double|char|unsigned|signed|void)\b`, KeywordType, nil},
42 {Words(``, `\b`, `inline`, `_inline`, `__inline`, `naked`, `restrict`, `thread`, `typename`), KeywordReserved, nil},
43 {`(__m(128i|128d|128|64))\b`, KeywordReserved, nil},
44 {Words(`__`, `\b`, `asm`, `int8`, `based`, `except`, `int16`, `stdcall`, `cdecl`, `fastcall`, `int32`, `declspec`, `finally`, `int64`, `try`, `leave`, `wchar_t`, `w64`, `unaligned`, `raise`, `noop`, `identifier`, `forceinline`, `assume`), KeywordReserved, nil},
45 {`(true|false|NULL)\b`, NameBuiltin, nil},
46 {`([a-zA-Z_]\w*)(\s*)(:)(?!:)`, ByGroups(NameLabel, Text, Punctuation), nil},
47 {`[a-zA-Z_]\w*`, Name, nil},
48 },
49 "root": {
50 Include("whitespace"),
51 {`((?:[\w*\s])+?(?:\s|[*]))([a-zA-Z_]\w*)(\s*\([^;]*?\))([^;{]*)(\{)`, ByGroups(UsingSelf("root"), NameFunction, UsingSelf("root"), UsingSelf("root"), Punctuation), Push("function")},
52 {`((?:[\w*\s])+?(?:\s|[*]))([a-zA-Z_]\w*)(\s*\([^;]*?\))([^;]*)(;)`, ByGroups(UsingSelf("root"), NameFunction, UsingSelf("root"), UsingSelf("root"), Punctuation), nil},
53 Default(Push("statement")),
54 },
55 "statement": {
56 Include("whitespace"),
57 Include("statements"),
58 {`[{}]`, Punctuation, nil},
59 {`;`, Punctuation, Pop(1)},
60 },
61 "function": {
62 Include("whitespace"),
63 Include("statements"),
64 {`;`, Punctuation, nil},
65 {`\{`, Punctuation, Push()},
66 {`\}`, Punctuation, Pop(1)},
67 },
68 "string": {
69 {`"`, LiteralString, Pop(1)},
70 {`\\([\\abfnrtv"\']|x[a-fA-F0-9]{2,4}|u[a-fA-F0-9]{4}|U[a-fA-F0-9]{8}|[0-7]{1,3})`, LiteralStringEscape, nil},
71 {`[^\\"\n]+`, LiteralString, nil},
72 {`\\\n`, LiteralString, nil},
73 {`\\`, LiteralString, nil},
74 },
75 "macro": {
76 {`(include)(\s*(?:/[*].*?[*]/\s*)?)([^\n]+)`, ByGroups(CommentPreproc, Text, CommentPreprocFile), nil},
77 {`[^/\n]+`, CommentPreproc, nil},
78 {`/[*](.|\n)*?[*]/`, CommentMultiline, nil},
79 {`//.*?\n`, CommentSingle, Pop(1)},
80 {`/`, CommentPreproc, nil},
81 {`(?<=\\)\n`, CommentPreproc, nil},
82 {`\n`, CommentPreproc, Pop(1)},
83 },
84 "if0": {
85 {`^\s*#if.*?(?<!\\)\n`, CommentPreproc, Push()},
86 {`^\s*#el(?:se|if).*\n`, CommentPreproc, Pop(1)},
87 {`^\s*#endif.*?(?<!\\)\n`, CommentPreproc, Pop(1)},
88 {`.*?\n`, Comment, nil},
89 },
90 },
91))