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