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# -*- coding: utf-8 -*-
"""
pygments.lexers.erlang
~~~~~~~~~~~~~~~~~~~~~~
Lexers for Erlang.
:copyright: Copyright 2006-2015 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import re
from pygments.lexer import Lexer, RegexLexer, bygroups, words, do_insertions, \
include, default
from pygments.token import Text, Comment, Operator, Keyword, Name, String, \
Number, Punctuation, Generic
__all__ = ['ErlangLexer', 'ErlangShellLexer', 'ElixirConsoleLexer',
'ElixirLexer']
line_re = re.compile('.*?\n')
class ErlangLexer(RegexLexer):
"""
For the Erlang functional programming language.
Blame Jeremy Thurgood (http://jerith.za.net/).
.. versionadded:: 0.9
"""
name = 'Erlang'
aliases = ['erlang']
filenames = ['*.erl', '*.hrl', '*.es', '*.escript']
mimetypes = ['text/x-erlang']
keywords = (
'after', 'begin', 'case', 'catch', 'cond', 'end', 'fun', 'if',
'let', 'of', 'query', 'receive', 'try', 'when',
)
builtins = ( # See erlang(3) man page
'abs', 'append_element', 'apply', 'atom_to_list', 'binary_to_list',
'bitstring_to_list', 'binary_to_term', 'bit_size', 'bump_reductions',
'byte_size', 'cancel_timer', 'check_process_code', 'delete_module',
'demonitor', 'disconnect_node', 'display', 'element', 'erase', 'exit',
'float', 'float_to_list', 'fun_info', 'fun_to_list',
'function_exported', 'garbage_collect', 'get', 'get_keys',
'group_leader', 'hash', 'hd', 'integer_to_list', 'iolist_to_binary',
'iolist_size', 'is_atom', 'is_binary', 'is_bitstring', 'is_boolean',
'is_builtin', 'is_float', 'is_function', 'is_integer', 'is_list',
'is_number', 'is_pid', 'is_port', 'is_process_alive', 'is_record',
'is_reference', 'is_tuple', 'length', 'link', 'list_to_atom',
'list_to_binary', 'list_to_bitstring', 'list_to_existing_atom',
'list_to_float', 'list_to_integer', 'list_to_pid', 'list_to_tuple',
'load_module', 'localtime_to_universaltime', 'make_tuple', 'md5',
'md5_final', 'md5_update', 'memory', 'module_loaded', 'monitor',
'monitor_node', 'node', 'nodes', 'open_port', 'phash', 'phash2',
'pid_to_list', 'port_close', 'port_command', 'port_connect',
'port_control', 'port_call', 'port_info', 'port_to_list',
'process_display', 'process_flag', 'process_info', 'purge_module',
'put', 'read_timer', 'ref_to_list', 'register', 'resume_process',
'round', 'send', 'send_after', 'send_nosuspend', 'set_cookie',
'setelement', 'size', 'spawn', 'spawn_link', 'spawn_monitor',
'spawn_opt', 'split_binary', 'start_timer', 'statistics',
'suspend_process', 'system_flag', 'system_info', 'system_monitor',
'system_profile', 'term_to_binary', 'tl', 'trace', 'trace_delivered',
'trace_info', 'trace_pattern', 'trunc', 'tuple_size', 'tuple_to_list',
'universaltime_to_localtime', 'unlink', 'unregister', 'whereis'
)
operators = r'(\+\+?|--?|\*|/|<|>|/=|=:=|=/=|=<|>=|==?|<-|!|\?)'
word_operators = (
'and', 'andalso', 'band', 'bnot', 'bor', 'bsl', 'bsr', 'bxor',
'div', 'not', 'or', 'orelse', 'rem', 'xor'
)
atom_re = r"(?:[a-z]\w*|'[^\n']*[^\\]')"
variable_re = r'(?:[A-Z_]\w*)'
escape_re = r'(?:\\(?:[bdefnrstv\'"\\/]|[0-7][0-7]?[0-7]?|\^[a-zA-Z]))'
macro_re = r'(?:'+variable_re+r'|'+atom_re+r')'
base_re = r'(?:[2-9]|[12][0-9]|3[0-6])'
tokens = {
'root': [
(r'\s+', Text),
(r'%.*\n', Comment),
(words(keywords, suffix=r'\b'), Keyword),
(words(builtins, suffix=r'\b'), Name.Builtin),
(words(word_operators, suffix=r'\b'), Operator.Word),
(r'^-', Punctuation, 'directive'),
(operators, Operator),
(r'"', String, 'string'),
(r'<<', Name.Label),
(r'>>', Name.Label),
('(' + atom_re + ')(:)', bygroups(Name.Namespace, Punctuation)),
('(?:^|(?<=:))(' + atom_re + r')(\s*)(\()',
bygroups(Name.Function, Text, Punctuation)),
(r'[+-]?' + base_re + r'#[0-9a-zA-Z]+', Number.Integer),
(r'[+-]?\d+', Number.Integer),
(r'[+-]?\d+.\d+', Number.Float),
(r'[]\[:_@\".{}()|;,]', Punctuation),
(variable_re, Name.Variable),
(atom_re, Name),
(r'\?'+macro_re, Name.Constant),
(r'\$(?:'+escape_re+r'|\\[ %]|[^\\])', String.Char),
(r'#'+atom_re+r'(:?\.'+atom_re+r')?', Name.Label),
],
'string': [
(escape_re, String.Escape),
(r'"', String, '#pop'),
(r'~[0-9.*]*[~#+bBcdefginpPswWxX]', String.Interpol),
(r'[^"\\~]+', String),
(r'~', String),
],
'directive': [
(r'(define)(\s*)(\()('+macro_re+r')',
bygroups(Name.Entity, Text, Punctuation, Name.Constant), '#pop'),
(r'(record)(\s*)(\()('+macro_re+r')',
bygroups(Name.Entity, Text, Punctuation, Name.Label), '#pop'),
(atom_re, Name.Entity, '#pop'),
],
}
class ErlangShellLexer(Lexer):
"""
Shell sessions in erl (for Erlang code).
.. versionadded:: 1.1
"""
name = 'Erlang erl session'
aliases = ['erl']
filenames = ['*.erl-sh']
mimetypes = ['text/x-erl-shellsession']
_prompt_re = re.compile(r'\d+>(?=\s|\Z)')
def get_tokens_unprocessed(self, text):
erlexer = ErlangLexer(**self.options)
curcode = ''
insertions = []
for match in line_re.finditer(text):
line = match.group()
m = self._prompt_re.match(line)
if m is not None:
end = m.end()
insertions.append((len(curcode),
[(0, Generic.Prompt, line[:end])]))
curcode += line[end:]
else:
if curcode:
for item in do_insertions(insertions,
erlexer.get_tokens_unprocessed(curcode)):
yield item
curcode = ''
insertions = []
if line.startswith('*'):
yield match.start(), Generic.Traceback, line
else:
yield match.start(), Generic.Output, line
if curcode:
for item in do_insertions(insertions,
erlexer.get_tokens_unprocessed(curcode)):
yield item
def gen_elixir_string_rules(name, symbol, token):
states = {}
states['string_' + name] = [
(r'[^#%s\\]+' % (symbol,), token),
include('escapes'),
(r'\\.', token),
(r'(%s)' % (symbol,), bygroups(token), "#pop"),
include('interpol')
]
return states
def gen_elixir_sigstr_rules(term, token, interpol=True):
if interpol:
return [
(r'[^#%s\\]+' % (term,), token),
include('escapes'),
(r'\\.', token),
(r'%s[a-zA-Z]*' % (term,), token, '#pop'),
include('interpol')
]
else:
return [
(r'[^%s\\]+' % (term,), token),
(r'\\.', token),
(r'%s[a-zA-Z]*' % (term,), token, '#pop'),
]
class ElixirLexer(RegexLexer):
"""
For the `Elixir language `_.
.. versionadded:: 1.5
"""
name = 'Elixir'
aliases = ['elixir', 'ex', 'exs']
filenames = ['*.ex', '*.exs']
mimetypes = ['text/x-elixir']
KEYWORD = ('fn', 'do', 'end', 'after', 'else', 'rescue', 'catch')
KEYWORD_OPERATOR = ('not', 'and', 'or', 'when', 'in')
BUILTIN = (
'case', 'cond', 'for', 'if', 'unless', 'try', 'receive', 'raise',
'quote', 'unquote', 'unquote_splicing', 'throw', 'super'
)
BUILTIN_DECLARATION = (
'def', 'defp', 'defmodule', 'defprotocol', 'defmacro', 'defmacrop',
'defdelegate', 'defexception', 'defstruct', 'defimpl', 'defcallback'
)
BUILTIN_NAMESPACE = ('import', 'require', 'use', 'alias')
CONSTANT = ('nil', 'true', 'false')
PSEUDO_VAR = ('_', '__MODULE__', '__DIR__', '__ENV__', '__CALLER__')
OPERATORS3 = (
'<<<', '>>>', '|||', '&&&', '^^^', '~~~', '===', '!==',
'~>>', '<~>', '|~>', '<|>',
)
OPERATORS2 = (
'==', '!=', '<=', '>=', '&&', '||', '<>', '++', '--', '|>', '=~',
'->', '<-', '|', '.', '=', '~>', '<~',
)
OPERATORS1 = ('<', '>', '+', '-', '*', '/', '!', '^', '&')
PUNCTUATION = (
'\\\\', '<<', '>>', '=>', '(', ')', ':', ';', ',', '[', ']'
)
def get_tokens_unprocessed(self, text):
for index, token, value in RegexLexer.get_tokens_unprocessed(self, text):
if token is Name:
if value in self.KEYWORD:
yield index, Keyword, value
elif value in self.KEYWORD_OPERATOR:
yield index, Operator.Word, value
elif value in self.BUILTIN:
yield index, Keyword, value
elif value in self.BUILTIN_DECLARATION:
yield index, Keyword.Declaration, value
elif value in self.BUILTIN_NAMESPACE:
yield index, Keyword.Namespace, value
elif value in self.CONSTANT:
yield index, Name.Constant, value
elif value in self.PSEUDO_VAR:
yield index, Name.Builtin.Pseudo, value
else:
yield index, token, value
else:
yield index, token, value
def gen_elixir_sigil_rules():
# all valid sigil terminators (excluding heredocs)
terminators = [
(r'\{', r'\}', 'cb'),
(r'\[', r'\]', 'sb'),
(r'\(', r'\)', 'pa'),
(r'<', r'>', 'ab'),
(r'/', r'/', 'slas'),
(r'\|', r'\|', 'pipe'),
('"', '"', 'quot'),
("'", "'", 'apos'),
]
# heredocs have slightly different rules
triquotes = [(r'"""', 'triquot'), (r"'''", 'triapos')]
token = String.Other
states = {'sigils': []}
for term, name in triquotes:
states['sigils'] += [
(r'(~[a-z])(%s)' % (term,), bygroups(token, String.Heredoc),
(name + '-end', name + '-intp')),
(r'(~[A-Z])(%s)' % (term,), bygroups(token, String.Heredoc),
(name + '-end', name + '-no-intp')),
]
states[name + '-end'] = [
(r'[a-zA-Z]+', token, '#pop'),
default('#pop'),
]
states[name + '-intp'] = [
(r'^\s*' + term, String.Heredoc, '#pop'),
include('heredoc_interpol'),
]
states[name + '-no-intp'] = [
(r'^\s*' + term, String.Heredoc, '#pop'),
include('heredoc_no_interpol'),
]
for lterm, rterm, name in terminators:
states['sigils'] += [
(r'~[a-z]' + lterm, token, name + '-intp'),
(r'~[A-Z]' + lterm, token, name + '-no-intp'),
]
states[name + '-intp'] = gen_elixir_sigstr_rules(rterm, token)
states[name + '-no-intp'] = \
gen_elixir_sigstr_rules(rterm, token, interpol=False)
return states
op3_re = "|".join(re.escape(s) for s in OPERATORS3)
op2_re = "|".join(re.escape(s) for s in OPERATORS2)
op1_re = "|".join(re.escape(s) for s in OPERATORS1)
ops_re = r'(?:%s|%s|%s)' % (op3_re, op2_re, op1_re)
punctuation_re = "|".join(re.escape(s) for s in PUNCTUATION)
alnum = '\w'
name_re = r'(?:\.\.\.|[a-z_]%s*[!?]?)' % alnum
modname_re = r'[A-Z]%(alnum)s*(?:\.[A-Z]%(alnum)s*)*' % {'alnum': alnum}
complex_name_re = r'(?:%s|%s|%s)' % (name_re, modname_re, ops_re)
special_atom_re = r'(?:\.\.\.|<<>>|%\{\}|%|\{\})'
long_hex_char_re = r'(\\x\{)([\da-fA-F]+)(\})'
hex_char_re = r'(\\x[\da-fA-F]{1,2})'
escape_char_re = r'(\\[abdefnrstv])'
tokens = {
'root': [
(r'\s+', Text),
(r'#.*$', Comment.Single),
# Various kinds of characters
(r'(\?)' + long_hex_char_re,
bygroups(String.Char,
String.Escape, Number.Hex, String.Escape)),
(r'(\?)' + hex_char_re,
bygroups(String.Char, String.Escape)),
(r'(\?)' + escape_char_re,
bygroups(String.Char, String.Escape)),
(r'\?\\?.', String.Char),
# '::' has to go before atoms
(r':::', String.Symbol),
(r'::', Operator),
# atoms
(r':' + special_atom_re, String.Symbol),
(r':' + complex_name_re, String.Symbol),
(r':"', String.Symbol, 'string_double_atom'),
(r":'", String.Symbol, 'string_single_atom'),
# [keywords: ...]
(r'(%s|%s)(:)(?=\s|\n)' % (special_atom_re, complex_name_re),
bygroups(String.Symbol, Punctuation)),
# @attributes
(r'@' + name_re, Name.Attribute),
# identifiers
(name_re, Name),
(r'(%%?)(%s)' % (modname_re,), bygroups(Punctuation, Name.Class)),
# operators and punctuation
(op3_re, Operator),
(op2_re, Operator),
(punctuation_re, Punctuation),
(r'&\d', Name.Entity), # anon func arguments
(op1_re, Operator),
# numbers
(r'0b[01]+', Number.Bin),
(r'0o[0-7]+', Number.Oct),
(r'0x[\da-fA-F]+', Number.Hex),
(r'\d(_?\d)*\.\d(_?\d)*([eE][-+]?\d(_?\d)*)?', Number.Float),
(r'\d(_?\d)*', Number.Integer),
# strings and heredocs
(r'"""\s*', String.Heredoc, 'heredoc_double'),
(r"'''\s*$", String.Heredoc, 'heredoc_single'),
(r'"', String.Double, 'string_double'),
(r"'", String.Single, 'string_single'),
include('sigils'),
(r'%\{', Punctuation, 'map_key'),
(r'\{', Punctuation, 'tuple'),
],
'heredoc_double': [
(r'^\s*"""', String.Heredoc, '#pop'),
include('heredoc_interpol'),
],
'heredoc_single': [
(r"^\s*'''", String.Heredoc, '#pop'),
include('heredoc_interpol'),
],
'heredoc_interpol': [
(r'[^#\\\n]+', String.Heredoc),
include('escapes'),
(r'\\.', String.Heredoc),
(r'\n+', String.Heredoc),
include('interpol'),
],
'heredoc_no_interpol': [
(r'[^\\\n]+', String.Heredoc),
(r'\\.', String.Heredoc),
(r'\n+', String.Heredoc),
],
'escapes': [
(long_hex_char_re,
bygroups(String.Escape, Number.Hex, String.Escape)),
(hex_char_re, String.Escape),
(escape_char_re, String.Escape),
],
'interpol': [
(r'#\{', String.Interpol, 'interpol_string'),
],
'interpol_string': [
(r'\}', String.Interpol, "#pop"),
include('root')
],
'map_key': [
include('root'),
(r':', Punctuation, 'map_val'),
(r'=>', Punctuation, 'map_val'),
(r'\}', Punctuation, '#pop'),
],
'map_val': [
include('root'),
(r',', Punctuation, '#pop'),
(r'(?=\})', Punctuation, '#pop'),
],
'tuple': [
include('root'),
(r'\}', Punctuation, '#pop'),
],
}
tokens.update(gen_elixir_string_rules('double', '"', String.Double))
tokens.update(gen_elixir_string_rules('single', "'", String.Single))
tokens.update(gen_elixir_string_rules('double_atom', '"', String.Symbol))
tokens.update(gen_elixir_string_rules('single_atom', "'", String.Symbol))
tokens.update(gen_elixir_sigil_rules())
class ElixirConsoleLexer(Lexer):
"""
For Elixir interactive console (iex) output like:
.. sourcecode:: iex
iex> [head | tail] = [1,2,3]
[1,2,3]
iex> head
1
iex> tail
[2,3]
iex> [head | tail]
[1,2,3]
iex> length [head | tail]
3
.. versionadded:: 1.5
"""
name = 'Elixir iex session'
aliases = ['iex']
mimetypes = ['text/x-elixir-shellsession']
_prompt_re = re.compile('(iex|\.{3})(\(\d+\))?> ')
def get_tokens_unprocessed(self, text):
exlexer = ElixirLexer(**self.options)
curcode = ''
in_error = False
insertions = []
for match in line_re.finditer(text):
line = match.group()
if line.startswith(u'** '):
in_error = True
insertions.append((len(curcode),
[(0, Generic.Error, line[:-1])]))
curcode += line[-1:]
else:
m = self._prompt_re.match(line)
if m is not None:
in_error = False
end = m.end()
insertions.append((len(curcode),
[(0, Generic.Prompt, line[:end])]))
curcode += line[end:]
else:
if curcode:
for item in do_insertions(
insertions, exlexer.get_tokens_unprocessed(curcode)):
yield item
curcode = ''
insertions = []
token = Generic.Error if in_error else Generic.Output
yield match.start(), token, line
if curcode:
for item in do_insertions(
insertions, exlexer.get_tokens_unprocessed(curcode)):
yield item