562 lines
19 KiB
Python
562 lines
19 KiB
Python
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# -*- coding: utf-8 -*-
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"""
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pygments.lexers.data
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~~~~~~~~~~~~~~~~~~~~
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Lexers for data file format.
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:copyright: Copyright 2006-2020 by the Pygments team, see AUTHORS.
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:license: BSD, see LICENSE for details.
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"""
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import re
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from pygments.lexer import RegexLexer, ExtendedRegexLexer, LexerContext, \
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include, bygroups, inherit
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from pygments.token import Text, Comment, Keyword, Name, String, Number, \
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Punctuation, Literal, Error
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__all__ = ['YamlLexer', 'JsonLexer', 'JsonBareObjectLexer', 'JsonLdLexer']
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class YamlLexerContext(LexerContext):
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"""Indentation context for the YAML lexer."""
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def __init__(self, *args, **kwds):
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super().__init__(*args, **kwds)
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self.indent_stack = []
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self.indent = -1
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self.next_indent = 0
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self.block_scalar_indent = None
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class YamlLexer(ExtendedRegexLexer):
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"""
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Lexer for `YAML <http://yaml.org/>`_, a human-friendly data serialization
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language.
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.. versionadded:: 0.11
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"""
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name = 'YAML'
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aliases = ['yaml']
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filenames = ['*.yaml', '*.yml']
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mimetypes = ['text/x-yaml']
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def something(token_class):
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"""Do not produce empty tokens."""
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def callback(lexer, match, context):
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text = match.group()
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if not text:
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return
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yield match.start(), token_class, text
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context.pos = match.end()
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return callback
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def reset_indent(token_class):
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"""Reset the indentation levels."""
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def callback(lexer, match, context):
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text = match.group()
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context.indent_stack = []
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context.indent = -1
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context.next_indent = 0
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context.block_scalar_indent = None
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yield match.start(), token_class, text
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context.pos = match.end()
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return callback
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def save_indent(token_class, start=False):
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"""Save a possible indentation level."""
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def callback(lexer, match, context):
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text = match.group()
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extra = ''
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if start:
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context.next_indent = len(text)
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if context.next_indent < context.indent:
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while context.next_indent < context.indent:
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context.indent = context.indent_stack.pop()
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if context.next_indent > context.indent:
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extra = text[context.indent:]
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text = text[:context.indent]
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else:
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context.next_indent += len(text)
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if text:
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yield match.start(), token_class, text
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if extra:
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yield match.start()+len(text), token_class.Error, extra
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context.pos = match.end()
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return callback
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def set_indent(token_class, implicit=False):
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"""Set the previously saved indentation level."""
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def callback(lexer, match, context):
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text = match.group()
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if context.indent < context.next_indent:
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context.indent_stack.append(context.indent)
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context.indent = context.next_indent
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if not implicit:
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context.next_indent += len(text)
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yield match.start(), token_class, text
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context.pos = match.end()
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return callback
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def set_block_scalar_indent(token_class):
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"""Set an explicit indentation level for a block scalar."""
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def callback(lexer, match, context):
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text = match.group()
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context.block_scalar_indent = None
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if not text:
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return
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increment = match.group(1)
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if increment:
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current_indent = max(context.indent, 0)
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increment = int(increment)
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context.block_scalar_indent = current_indent + increment
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if text:
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yield match.start(), token_class, text
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context.pos = match.end()
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return callback
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def parse_block_scalar_empty_line(indent_token_class, content_token_class):
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"""Process an empty line in a block scalar."""
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def callback(lexer, match, context):
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text = match.group()
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if (context.block_scalar_indent is None or
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len(text) <= context.block_scalar_indent):
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if text:
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yield match.start(), indent_token_class, text
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else:
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indentation = text[:context.block_scalar_indent]
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content = text[context.block_scalar_indent:]
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yield match.start(), indent_token_class, indentation
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yield (match.start()+context.block_scalar_indent,
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content_token_class, content)
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context.pos = match.end()
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return callback
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def parse_block_scalar_indent(token_class):
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"""Process indentation spaces in a block scalar."""
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def callback(lexer, match, context):
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text = match.group()
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if context.block_scalar_indent is None:
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if len(text) <= max(context.indent, 0):
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context.stack.pop()
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context.stack.pop()
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return
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context.block_scalar_indent = len(text)
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else:
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if len(text) < context.block_scalar_indent:
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context.stack.pop()
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context.stack.pop()
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return
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if text:
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yield match.start(), token_class, text
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context.pos = match.end()
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return callback
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def parse_plain_scalar_indent(token_class):
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"""Process indentation spaces in a plain scalar."""
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def callback(lexer, match, context):
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text = match.group()
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if len(text) <= context.indent:
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context.stack.pop()
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context.stack.pop()
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return
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if text:
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yield match.start(), token_class, text
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context.pos = match.end()
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return callback
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tokens = {
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# the root rules
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'root': [
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# ignored whitespaces
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(r'[ ]+(?=#|$)', Text),
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# line breaks
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(r'\n+', Text),
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# a comment
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(r'#[^\n]*', Comment.Single),
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# the '%YAML' directive
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(r'^%YAML(?=[ ]|$)', reset_indent(Name.Tag), 'yaml-directive'),
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# the %TAG directive
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(r'^%TAG(?=[ ]|$)', reset_indent(Name.Tag), 'tag-directive'),
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# document start and document end indicators
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(r'^(?:---|\.\.\.)(?=[ ]|$)', reset_indent(Name.Namespace),
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'block-line'),
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# indentation spaces
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(r'[ ]*(?!\s|$)', save_indent(Text, start=True),
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('block-line', 'indentation')),
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],
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# trailing whitespaces after directives or a block scalar indicator
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'ignored-line': [
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# ignored whitespaces
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(r'[ ]+(?=#|$)', Text),
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# a comment
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(r'#[^\n]*', Comment.Single),
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# line break
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(r'\n', Text, '#pop:2'),
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],
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# the %YAML directive
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'yaml-directive': [
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# the version number
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(r'([ ]+)([0-9]+\.[0-9]+)',
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bygroups(Text, Number), 'ignored-line'),
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],
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# the %TAG directive
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'tag-directive': [
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# a tag handle and the corresponding prefix
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(r'([ ]+)(!|![\w-]*!)'
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r'([ ]+)(!|!?[\w;/?:@&=+$,.!~*\'()\[\]%-]+)',
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bygroups(Text, Keyword.Type, Text, Keyword.Type),
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'ignored-line'),
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],
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# block scalar indicators and indentation spaces
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'indentation': [
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# trailing whitespaces are ignored
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(r'[ ]*$', something(Text), '#pop:2'),
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# whitespaces preceding block collection indicators
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(r'[ ]+(?=[?:-](?:[ ]|$))', save_indent(Text)),
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# block collection indicators
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(r'[?:-](?=[ ]|$)', set_indent(Punctuation.Indicator)),
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# the beginning a block line
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(r'[ ]*', save_indent(Text), '#pop'),
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],
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# an indented line in the block context
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'block-line': [
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# the line end
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(r'[ ]*(?=#|$)', something(Text), '#pop'),
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# whitespaces separating tokens
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(r'[ ]+', Text),
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# key with colon
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(r'''([^#,:?\[\]{}"'\n]+)(:)(?=[ ]|$)''',
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bygroups(Name.Tag, set_indent(Punctuation, implicit=True))),
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# tags, anchors and aliases,
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include('descriptors'),
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# block collections and scalars
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include('block-nodes'),
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# flow collections and quoted scalars
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include('flow-nodes'),
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# a plain scalar
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(r'(?=[^\s?:,\[\]{}#&*!|>\'"%@`-]|[?:-]\S)',
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something(Name.Variable),
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'plain-scalar-in-block-context'),
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],
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# tags, anchors, aliases
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'descriptors': [
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# a full-form tag
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(r'!<[\w#;/?:@&=+$,.!~*\'()\[\]%-]+>', Keyword.Type),
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# a tag in the form '!', '!suffix' or '!handle!suffix'
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(r'!(?:[\w-]+!)?'
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r'[\w#;/?:@&=+$,.!~*\'()\[\]%-]*', Keyword.Type),
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# an anchor
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(r'&[\w-]+', Name.Label),
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# an alias
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(r'\*[\w-]+', Name.Variable),
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],
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# block collections and scalars
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'block-nodes': [
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# implicit key
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(r':(?=[ ]|$)', set_indent(Punctuation.Indicator, implicit=True)),
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# literal and folded scalars
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(r'[|>]', Punctuation.Indicator,
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('block-scalar-content', 'block-scalar-header')),
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],
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# flow collections and quoted scalars
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'flow-nodes': [
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# a flow sequence
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(r'\[', Punctuation.Indicator, 'flow-sequence'),
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# a flow mapping
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(r'\{', Punctuation.Indicator, 'flow-mapping'),
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# a single-quoted scalar
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(r'\'', String, 'single-quoted-scalar'),
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# a double-quoted scalar
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(r'\"', String, 'double-quoted-scalar'),
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],
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# the content of a flow collection
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'flow-collection': [
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# whitespaces
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(r'[ ]+', Text),
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# line breaks
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(r'\n+', Text),
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# a comment
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(r'#[^\n]*', Comment.Single),
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# simple indicators
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(r'[?:,]', Punctuation.Indicator),
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# tags, anchors and aliases
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include('descriptors'),
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# nested collections and quoted scalars
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include('flow-nodes'),
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# a plain scalar
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(r'(?=[^\s?:,\[\]{}#&*!|>\'"%@`])',
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something(Name.Variable),
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'plain-scalar-in-flow-context'),
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],
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# a flow sequence indicated by '[' and ']'
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'flow-sequence': [
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# include flow collection rules
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include('flow-collection'),
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# the closing indicator
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(r'\]', Punctuation.Indicator, '#pop'),
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],
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# a flow mapping indicated by '{' and '}'
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'flow-mapping': [
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# key with colon
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(r'''([^,:?\[\]{}"'\n]+)(:)(?=[ ]|$)''',
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bygroups(Name.Tag, Punctuation)),
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# include flow collection rules
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include('flow-collection'),
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# the closing indicator
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(r'\}', Punctuation.Indicator, '#pop'),
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],
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# block scalar lines
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'block-scalar-content': [
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# line break
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(r'\n', Text),
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# empty line
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(r'^[ ]+$',
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parse_block_scalar_empty_line(Text, Name.Constant)),
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# indentation spaces (we may leave the state here)
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(r'^[ ]*', parse_block_scalar_indent(Text)),
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# line content
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(r'[\S\t ]+', Name.Constant),
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],
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# the content of a literal or folded scalar
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'block-scalar-header': [
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# indentation indicator followed by chomping flag
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(r'([1-9])?[+-]?(?=[ ]|$)',
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set_block_scalar_indent(Punctuation.Indicator),
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'ignored-line'),
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# chomping flag followed by indentation indicator
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(r'[+-]?([1-9])?(?=[ ]|$)',
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set_block_scalar_indent(Punctuation.Indicator),
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'ignored-line'),
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],
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# ignored and regular whitespaces in quoted scalars
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'quoted-scalar-whitespaces': [
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# leading and trailing whitespaces are ignored
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(r'^[ ]+', Text),
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(r'[ ]+$', Text),
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# line breaks are ignored
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(r'\n+', Text),
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# other whitespaces are a part of the value
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(r'[ ]+', Name.Variable),
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],
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# single-quoted scalars
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'single-quoted-scalar': [
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# include whitespace and line break rules
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include('quoted-scalar-whitespaces'),
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# escaping of the quote character
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(r'\'\'', String.Escape),
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# regular non-whitespace characters
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(r'[^\s\']+', String),
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# the closing quote
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(r'\'', String, '#pop'),
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],
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# double-quoted scalars
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'double-quoted-scalar': [
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# include whitespace and line break rules
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include('quoted-scalar-whitespaces'),
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# escaping of special characters
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(r'\\[0abt\tn\nvfre "\\N_LP]', String),
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# escape codes
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|
|
(r'\\(?:x[0-9A-Fa-f]{2}|u[0-9A-Fa-f]{4}|U[0-9A-Fa-f]{8})',
|
||
|
|
String.Escape),
|
||
|
|
# regular non-whitespace characters
|
||
|
|
(r'[^\s"\\]+', String),
|
||
|
|
# the closing quote
|
||
|
|
(r'"', String, '#pop'),
|
||
|
|
],
|
||
|
|
|
||
|
|
# the beginning of a new line while scanning a plain scalar
|
||
|
|
'plain-scalar-in-block-context-new-line': [
|
||
|
|
# empty lines
|
||
|
|
(r'^[ ]+$', Text),
|
||
|
|
# line breaks
|
||
|
|
(r'\n+', Text),
|
||
|
|
# document start and document end indicators
|
||
|
|
(r'^(?=---|\.\.\.)', something(Name.Namespace), '#pop:3'),
|
||
|
|
# indentation spaces (we may leave the block line state here)
|
||
|
|
(r'^[ ]*', parse_plain_scalar_indent(Text), '#pop'),
|
||
|
|
],
|
||
|
|
|
||
|
|
# a plain scalar in the block context
|
||
|
|
'plain-scalar-in-block-context': [
|
||
|
|
# the scalar ends with the ':' indicator
|
||
|
|
(r'[ ]*(?=:[ ]|:$)', something(Text), '#pop'),
|
||
|
|
# the scalar ends with whitespaces followed by a comment
|
||
|
|
(r'[ ]+(?=#)', Text, '#pop'),
|
||
|
|
# trailing whitespaces are ignored
|
||
|
|
(r'[ ]+$', Text),
|
||
|
|
# line breaks are ignored
|
||
|
|
(r'\n+', Text, 'plain-scalar-in-block-context-new-line'),
|
||
|
|
# other whitespaces are a part of the value
|
||
|
|
(r'[ ]+', Literal.Scalar.Plain),
|
||
|
|
# regular non-whitespace characters
|
||
|
|
(r'(?::(?!\s)|[^\s:])+', Literal.Scalar.Plain),
|
||
|
|
],
|
||
|
|
|
||
|
|
# a plain scalar is the flow context
|
||
|
|
'plain-scalar-in-flow-context': [
|
||
|
|
# the scalar ends with an indicator character
|
||
|
|
(r'[ ]*(?=[,:?\[\]{}])', something(Text), '#pop'),
|
||
|
|
# the scalar ends with a comment
|
||
|
|
(r'[ ]+(?=#)', Text, '#pop'),
|
||
|
|
# leading and trailing whitespaces are ignored
|
||
|
|
(r'^[ ]+', Text),
|
||
|
|
(r'[ ]+$', Text),
|
||
|
|
# line breaks are ignored
|
||
|
|
(r'\n+', Text),
|
||
|
|
# other whitespaces are a part of the value
|
||
|
|
(r'[ ]+', Name.Variable),
|
||
|
|
# regular non-whitespace characters
|
||
|
|
(r'[^\s,:?\[\]{}]+', Name.Variable),
|
||
|
|
],
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
def get_tokens_unprocessed(self, text=None, context=None):
|
||
|
|
if context is None:
|
||
|
|
context = YamlLexerContext(text, 0)
|
||
|
|
return super().get_tokens_unprocessed(text, context)
|
||
|
|
|
||
|
|
|
||
|
|
class JsonLexer(RegexLexer):
|
||
|
|
"""
|
||
|
|
For JSON data structures.
|
||
|
|
|
||
|
|
.. versionadded:: 1.5
|
||
|
|
"""
|
||
|
|
|
||
|
|
name = 'JSON'
|
||
|
|
aliases = ['json']
|
||
|
|
filenames = ['*.json', 'Pipfile.lock']
|
||
|
|
mimetypes = ['application/json']
|
||
|
|
|
||
|
|
flags = re.DOTALL
|
||
|
|
|
||
|
|
# integer part of a number
|
||
|
|
int_part = r'-?(0|[1-9]\d*)'
|
||
|
|
|
||
|
|
# fractional part of a number
|
||
|
|
frac_part = r'\.\d+'
|
||
|
|
|
||
|
|
# exponential part of a number
|
||
|
|
exp_part = r'[eE](\+|-)?\d+'
|
||
|
|
|
||
|
|
tokens = {
|
||
|
|
'whitespace': [
|
||
|
|
(r'\s+', Text),
|
||
|
|
],
|
||
|
|
|
||
|
|
# represents a simple terminal value
|
||
|
|
'simplevalue': [
|
||
|
|
(r'(true|false|null)\b', Keyword.Constant),
|
||
|
|
(('%(int_part)s(%(frac_part)s%(exp_part)s|'
|
||
|
|
'%(exp_part)s|%(frac_part)s)') % vars(),
|
||
|
|
Number.Float),
|
||
|
|
(int_part, Number.Integer),
|
||
|
|
(r'"(\\(["\\/bfnrt]|u[a-fA-F0-9]{4})|[^\\"])*"', String.Double),
|
||
|
|
],
|
||
|
|
|
||
|
|
|
||
|
|
# the right hand side of an object, after the attribute name
|
||
|
|
'objectattribute': [
|
||
|
|
include('value'),
|
||
|
|
(r':', Punctuation),
|
||
|
|
# comma terminates the attribute but expects more
|
||
|
|
(r',', Punctuation, '#pop'),
|
||
|
|
# a closing bracket terminates the entire object, so pop twice
|
||
|
|
(r'\}', Punctuation, '#pop:2'),
|
||
|
|
],
|
||
|
|
|
||
|
|
# a json object - { attr, attr, ... }
|
||
|
|
'objectvalue': [
|
||
|
|
include('whitespace'),
|
||
|
|
(r'"(\\(["\\/bfnrt]|u[a-fA-F0-9]{4})|[^\\"])*"', Name.Tag, 'objectattribute'),
|
||
|
|
(r'\}', Punctuation, '#pop'),
|
||
|
|
],
|
||
|
|
|
||
|
|
# json array - [ value, value, ... }
|
||
|
|
'arrayvalue': [
|
||
|
|
include('whitespace'),
|
||
|
|
include('value'),
|
||
|
|
(r',', Punctuation),
|
||
|
|
(r'\]', Punctuation, '#pop'),
|
||
|
|
],
|
||
|
|
|
||
|
|
# a json value - either a simple value or a complex value (object or array)
|
||
|
|
'value': [
|
||
|
|
include('whitespace'),
|
||
|
|
include('simplevalue'),
|
||
|
|
(r'\{', Punctuation, 'objectvalue'),
|
||
|
|
(r'\[', Punctuation, 'arrayvalue'),
|
||
|
|
],
|
||
|
|
|
||
|
|
# the root of a json document whould be a value
|
||
|
|
'root': [
|
||
|
|
include('value'),
|
||
|
|
],
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
class JsonBareObjectLexer(JsonLexer):
|
||
|
|
"""
|
||
|
|
For JSON data structures (with missing object curly braces).
|
||
|
|
|
||
|
|
.. versionadded:: 2.2
|
||
|
|
"""
|
||
|
|
|
||
|
|
name = 'JSONBareObject'
|
||
|
|
aliases = ['json-object']
|
||
|
|
filenames = []
|
||
|
|
mimetypes = ['application/json-object']
|
||
|
|
|
||
|
|
tokens = {
|
||
|
|
'root': [
|
||
|
|
(r'\}', Error),
|
||
|
|
include('objectvalue'),
|
||
|
|
],
|
||
|
|
'objectattribute': [
|
||
|
|
(r'\}', Error),
|
||
|
|
inherit,
|
||
|
|
],
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
class JsonLdLexer(JsonLexer):
|
||
|
|
"""
|
||
|
|
For `JSON-LD <http://json-ld.org/>`_ linked data.
|
||
|
|
|
||
|
|
.. versionadded:: 2.0
|
||
|
|
"""
|
||
|
|
|
||
|
|
name = 'JSON-LD'
|
||
|
|
aliases = ['jsonld', 'json-ld']
|
||
|
|
filenames = ['*.jsonld']
|
||
|
|
mimetypes = ['application/ld+json']
|
||
|
|
|
||
|
|
tokens = {
|
||
|
|
'objectvalue': [
|
||
|
|
(r'"@(context|id|value|language|type|container|list|set|'
|
||
|
|
r'reverse|index|base|vocab|graph)"', Name.Decorator,
|
||
|
|
'objectattribute'),
|
||
|
|
inherit,
|
||
|
|
],
|
||
|
|
}
|