intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 190 insertions, 0 deletions

diff --git a/contrib/python/Pygments/py3/pygments/lexers/r.py b/contrib/python/Pygments/py3/pygments/lexers/r.py
new file mode 100644
index 0000000000..44168a7ad5
--- /dev/null
+++ b/contrib/python/Pygments/py3/pygments/lexers/r.py
@@ -0,0 +1,190 @@
+"""
+    pygments.lexers.r
+    ~~~~~~~~~~~~~~~~~
+
+    Lexers for the R/S languages.
+
+    :copyright: Copyright 2006-2021 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import re
+
+from pygments.lexer import Lexer, RegexLexer, include, do_insertions
+from pygments.token import Text, Comment, Operator, Keyword, Name, String, \
+    Number, Punctuation, Generic
+
+__all__ = ['RConsoleLexer', 'SLexer', 'RdLexer']
+
+
+line_re  = re.compile('.*?\n')
+
+
+class RConsoleLexer(Lexer):
+    """
+    For R console transcripts or R CMD BATCH output files.
+    """
+
+    name = 'RConsole'
+    aliases = ['rconsole', 'rout']
+    filenames = ['*.Rout']
+
+    def get_tokens_unprocessed(self, text):
+        slexer = SLexer(**self.options)
+
+        current_code_block = ''
+        insertions = []
+
+        for match in line_re.finditer(text):
+            line = match.group()
+            if line.startswith('>') or line.startswith('+'):
+                # Colorize the prompt as such,
+                # then put rest of line into current_code_block
+                insertions.append((len(current_code_block),
+                                   [(0, Generic.Prompt, line[:2])]))
+                current_code_block += line[2:]
+            else:
+                # We have reached a non-prompt line!
+                # If we have stored prompt lines, need to process them first.
+                if current_code_block:
+                    # Weave together the prompts and highlight code.
+                    yield from do_insertions(
+                        insertions, slexer.get_tokens_unprocessed(current_code_block))
+                    # Reset vars for next code block.
+                    current_code_block = ''
+                    insertions = []
+                # Now process the actual line itself, this is output from R.
+                yield match.start(), Generic.Output, line
+
+        # If we happen to end on a code block with nothing after it, need to
+        # process the last code block. This is neither elegant nor DRY so
+        # should be changed.
+        if current_code_block:
+            yield from do_insertions(
+                insertions, slexer.get_tokens_unprocessed(current_code_block))
+
+
+class SLexer(RegexLexer):
+    """
+    For S, S-plus, and R source code.
+
+    .. versionadded:: 0.10
+    """
+
+    name = 'S'
+    aliases = ['splus', 's', 'r']
+    filenames = ['*.S', '*.R', '.Rhistory', '.Rprofile', '.Renviron']
+    mimetypes = ['text/S-plus', 'text/S', 'text/x-r-source', 'text/x-r',
+                 'text/x-R', 'text/x-r-history', 'text/x-r-profile']
+
+    valid_name = r'`[^`\\]*(?:\\.[^`\\]*)*`|(?:[a-zA-Z]|\.[A-Za-z_.])[\w.]*|\.'
+    tokens = {
+        'comments': [
+            (r'#.*$', Comment.Single),
+        ],
+        'valid_name': [
+            (valid_name, Name),
+        ],
+        'punctuation': [
+            (r'\[{1,2}|\]{1,2}|\(|\)|;|,', Punctuation),
+        ],
+        'keywords': [
+            (r'(if|else|for|while|repeat|in|next|break|return|switch|function)'
+             r'(?![\w.])',
+             Keyword.Reserved),
+        ],
+        'operators': [
+            (r'<<?-|->>?|-|==|<=|>=|<|>|&&?|!=|\|\|?|\?', Operator),
+            (r'\*|\+|\^|/|!|%[^%]*%|=|~|\$|@|:{1,3}', Operator),
+        ],
+        'builtin_symbols': [
+            (r'(NULL|NA(_(integer|real|complex|character)_)?|'
+             r'letters|LETTERS|Inf|TRUE|FALSE|NaN|pi|\.\.(\.|[0-9]+))'
+             r'(?![\w.])',
+             Keyword.Constant),
+            (r'(T|F)\b', Name.Builtin.Pseudo),
+        ],
+        'numbers': [
+            # hex number
+            (r'0[xX][a-fA-F0-9]+([pP][0-9]+)?[Li]?', Number.Hex),
+            # decimal number
+            (r'[+-]?([0-9]+(\.[0-9]+)?|\.[0-9]+|\.)([eE][+-]?[0-9]+)?[Li]?',
+             Number),
+        ],
+        'statements': [
+            include('comments'),
+            # whitespaces
+            (r'\s+', Text),
+            (r'\'', String, 'string_squote'),
+            (r'\"', String, 'string_dquote'),
+            include('builtin_symbols'),
+            include('valid_name'),
+            include('numbers'),
+            include('keywords'),
+            include('punctuation'),
+            include('operators'),
+        ],
+        'root': [
+            # calls:
+            (r'(%s)\s*(?=\()' % valid_name, Name.Function),
+            include('statements'),
+            # blocks:
+            (r'\{|\}', Punctuation),
+            # (r'\{', Punctuation, 'block'),
+            (r'.', Text),
+        ],
+        # 'block': [
+        #    include('statements'),
+        #    ('\{', Punctuation, '#push'),
+        #    ('\}', Punctuation, '#pop')
+        # ],
+        'string_squote': [
+            (r'([^\'\\]|\\.)*\'', String, '#pop'),
+        ],
+        'string_dquote': [
+            (r'([^"\\]|\\.)*"', String, '#pop'),
+        ],
+    }
+
+    def analyse_text(text):
+        if re.search(r'[a-z0-9_\])\s]<-(?!-)', text):
+            return 0.11
+
+
+class RdLexer(RegexLexer):
+    """
+    Pygments Lexer for R documentation (Rd) files
+
+    This is a very minimal implementation, highlighting little more
+    than the macros. A description of Rd syntax is found in `Writing R
+    Extensions <http://cran.r-project.org/doc/manuals/R-exts.html>`_
+    and `Parsing Rd files <http://developer.r-project.org/parseRd.pdf>`_.
+
+    .. versionadded:: 1.6
+    """
+    name = 'Rd'
+    aliases = ['rd']
+    filenames = ['*.Rd']
+    mimetypes = ['text/x-r-doc']
+
+    # To account for verbatim / LaTeX-like / and R-like areas
+    # would require parsing.
+    tokens = {
+        'root': [
+            # catch escaped brackets and percent sign
+            (r'\\[\\{}%]', String.Escape),
+            # comments
+            (r'%.*$', Comment),
+            # special macros with no arguments
+            (r'\\(?:cr|l?dots|R|tab)\b', Keyword.Constant),
+            # macros
+            (r'\\[a-zA-Z]+\b', Keyword),
+            # special preprocessor macros
+            (r'^\s*#(?:ifn?def|endif).*\b', Comment.Preproc),
+            # non-escaped brackets
+            (r'[{}]', Name.Builtin),
+            # everything else
+            (r'[^\\%\n{}]+', Text),
+            (r'.', Text),
+        ]
+    }