4c38e2c9dd
They're not actually reader macros, since their arguments are parsed s-expressions, like a regular macro, not pre-parsed source text.
71 lines
2.4 KiB
Python
71 lines
2.4 KiB
Python
# Copyright (c) 2013 Nicolas Dandrimont <nicolas.dandrimont@crans.org>
|
|
#
|
|
# Permission is hereby granted, free of charge, to any person obtaining a
|
|
# copy of this software and associated documentation files (the "Software"),
|
|
# to deal in the Software without restriction, including without limitation
|
|
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
# and/or sell copies of the Software, and to permit persons to whom the
|
|
# Software is furnished to do so, subject to the following conditions:
|
|
#
|
|
# The above copyright notice and this permission notice shall be included in
|
|
# all copies or substantial portions of the Software.
|
|
#
|
|
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
# DEALINGS IN THE SOFTWARE.
|
|
|
|
from rply import LexerGenerator
|
|
|
|
|
|
lg = LexerGenerator()
|
|
|
|
|
|
# A regexp for something that should end a quoting/unquoting operator
|
|
# i.e. a space or a closing brace/paren/curly
|
|
end_quote = r'(?![\s\)\]\}])'
|
|
|
|
|
|
lg.add('LPAREN', r'\(')
|
|
lg.add('RPAREN', r'\)')
|
|
lg.add('LBRACKET', r'\[')
|
|
lg.add('RBRACKET', r'\]')
|
|
lg.add('LCURLY', r'\{')
|
|
lg.add('RCURLY', r'\}')
|
|
lg.add('HLCURLY', r'#\{')
|
|
lg.add('QUOTE', r'\'%s' % end_quote)
|
|
lg.add('QUASIQUOTE', r'`%s' % end_quote)
|
|
lg.add('UNQUOTESPLICE', r'~@%s' % end_quote)
|
|
lg.add('UNQUOTE', r'~%s' % end_quote)
|
|
lg.add('HASHBANG', r'#!.*[^\r\n]')
|
|
lg.add('HASHOTHER', r'#[^{]')
|
|
|
|
# A regexp which matches incomplete strings, used to support
|
|
# multi-line strings in the interpreter
|
|
partial_string = r'''(?x)
|
|
(?:u|r|ur|ru|b|br|rb)? # prefix
|
|
" # start string
|
|
(?:
|
|
| [^"\\] # non-quote or backslash
|
|
| \\(.|\n) # or escaped single character or newline
|
|
| \\x[0-9a-fA-F]{2} # or escaped raw character
|
|
| \\u[0-9a-fA-F]{4} # or unicode escape
|
|
| \\U[0-9a-fA-F]{8} # or long unicode escape
|
|
)* # one or more times
|
|
'''
|
|
|
|
lg.add('STRING', r'%s"' % partial_string)
|
|
lg.add('PARTIAL_STRING', partial_string)
|
|
|
|
lg.add('IDENTIFIER', r'[^()\[\]{}\'"\s;]+')
|
|
|
|
|
|
lg.ignore(r';.*(?=\r|\n|$)')
|
|
lg.ignore(r'\s+')
|
|
|
|
|
|
lexer = lg.build()
|