File size: 5,076 Bytes
9c6594c |
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 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 |
"""
pygments.lexers.cddl
~~~~~~~~~~~~~~~~~~~~
Lexer for the Concise data definition language (CDDL), a notational
convention to express CBOR and JSON data structures.
More information:
https://datatracker.ietf.org/doc/rfc8610/
:copyright: Copyright 2006-2025 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
from pygments.lexer import RegexLexer, bygroups, include, words
from pygments.token import Comment, Error, Keyword, Name, Number, Operator, \
Punctuation, String, Whitespace
__all__ = ['CddlLexer']
class CddlLexer(RegexLexer):
"""
Lexer for CDDL definitions.
"""
name = "CDDL"
url = 'https://datatracker.ietf.org/doc/rfc8610/'
aliases = ["cddl"]
filenames = ["*.cddl"]
mimetypes = ["text/x-cddl"]
version_added = '2.8'
_prelude_types = [
"any",
"b64legacy",
"b64url",
"bigfloat",
"bigint",
"bignint",
"biguint",
"bool",
"bstr",
"bytes",
"cbor-any",
"decfrac",
"eb16",
"eb64legacy",
"eb64url",
"encoded-cbor",
"false",
"float",
"float16",
"float16-32",
"float32",
"float32-64",
"float64",
"int",
"integer",
"mime-message",
"nil",
"nint",
"null",
"number",
"regexp",
"tdate",
"text",
"time",
"true",
"tstr",
"uint",
"undefined",
"unsigned",
"uri",
]
_controls = [
".and",
".bits",
".cbor",
".cborseq",
".default",
".eq",
".ge",
".gt",
".le",
".lt",
".ne",
".regexp",
".size",
".within",
]
_re_id = (
r"[$@A-Z_a-z]"
r"(?:[\-\.]+(?=[$@0-9A-Z_a-z])|[$@0-9A-Z_a-z])*"
)
# While the spec reads more like "an int must not start with 0" we use a
# lookahead here that says "after a 0 there must be no digit". This makes the
# '0' the invalid character in '01', which looks nicer when highlighted.
_re_uint = r"(?:0b[01]+|0x[0-9a-fA-F]+|[1-9]\d*|0(?!\d))"
_re_int = r"-?" + _re_uint
tokens = {
"commentsandwhitespace": [(r"\s+", Whitespace), (r";.+$", Comment.Single)],
"root": [
include("commentsandwhitespace"),
# tag types
(rf"#(\d\.{_re_uint})?", Keyword.Type), # type or any
# occurrence
(
rf"({_re_uint})?(\*)({_re_uint})?",
bygroups(Number, Operator, Number),
),
(r"\?|\+", Operator), # occurrence
(r"\^", Operator), # cuts
(r"(\.\.\.|\.\.)", Operator), # rangeop
(words(_controls, suffix=r"\b"), Operator.Word), # ctlops
# into choice op
(rf"&(?=\s*({_re_id}|\())", Operator),
(rf"~(?=\s*{_re_id})", Operator), # unwrap op
(r"//|/(?!/)", Operator), # double und single slash
(r"=>|/==|/=|=", Operator),
(r"[\[\]{}\(\),<>:]", Punctuation),
# Bytestrings
(r"(b64)(')", bygroups(String.Affix, String.Single), "bstrb64url"),
(r"(h)(')", bygroups(String.Affix, String.Single), "bstrh"),
(r"'", String.Single, "bstr"),
# Barewords as member keys (must be matched before values, types, typenames,
# groupnames).
# Token type is String as barewords are always interpreted as such.
(rf"({_re_id})(\s*)(:)",
bygroups(String, Whitespace, Punctuation)),
# predefined types
(words(_prelude_types, prefix=r"(?![\-_$@])\b", suffix=r"\b(?![\-_$@])"),
Name.Builtin),
# user-defined groupnames, typenames
(_re_id, Name.Class),
# values
(r"0b[01]+", Number.Bin),
(r"0o[0-7]+", Number.Oct),
(r"0x[0-9a-fA-F]+(\.[0-9a-fA-F]+)?p[+-]?\d+", Number.Hex), # hexfloat
(r"0x[0-9a-fA-F]+", Number.Hex), # hex
# Float
(rf"{_re_int}(?=(\.\d|e[+-]?\d))(?:\.\d+)?(?:e[+-]?\d+)?",
Number.Float),
# Int
(_re_int, Number.Integer),
(r'"(\\\\|\\"|[^"])*"', String.Double),
],
"bstrb64url": [
(r"'", String.Single, "#pop"),
include("commentsandwhitespace"),
(r"\\.", String.Escape),
(r"[0-9a-zA-Z\-_=]+", String.Single),
(r".", Error),
# (r";.+$", Token.Other),
],
"bstrh": [
(r"'", String.Single, "#pop"),
include("commentsandwhitespace"),
(r"\\.", String.Escape),
(r"[0-9a-fA-F]+", String.Single),
(r".", Error),
],
"bstr": [
(r"'", String.Single, "#pop"),
(r"\\.", String.Escape),
(r"[^'\\]+", String.Single),
],
}
|