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70 lines
1.6 KiB
Python
70 lines
1.6 KiB
Python
5 years ago
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# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2009-2018 the sqlparse authors and contributors
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# <see AUTHORS file>
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#
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# This module is part of python-sqlparse and is released under
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# the BSD License: https://opensource.org/licenses/BSD-3-Clause
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#
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# The Token implementation is based on pygment's token system written
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# by Georg Brandl.
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# http://pygments.org/
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"""Tokens"""
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class _TokenType(tuple):
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parent = None
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def __contains__(self, item):
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return item is not None and (self is item or item[:len(self)] == self)
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def __getattr__(self, name):
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new = _TokenType(self + (name,))
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setattr(self, name, new)
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new.parent = self
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return new
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def __repr__(self):
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# self can be False only if its the `root` i.e. Token itself
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return 'Token' + ('.' if self else '') + '.'.join(self)
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Token = _TokenType()
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# Special token types
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Text = Token.Text
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Whitespace = Text.Whitespace
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Newline = Whitespace.Newline
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Error = Token.Error
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# Text that doesn't belong to this lexer (e.g. HTML in PHP)
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Other = Token.Other
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# Common token types for source code
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Keyword = Token.Keyword
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Name = Token.Name
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Literal = Token.Literal
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String = Literal.String
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Number = Literal.Number
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Punctuation = Token.Punctuation
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Operator = Token.Operator
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Comparison = Operator.Comparison
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Wildcard = Token.Wildcard
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Comment = Token.Comment
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Assignment = Token.Assignment
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# Generic types for non-source code
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Generic = Token.Generic
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Command = Generic.Command
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# String and some others are not direct children of Token.
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# alias them:
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Token.Token = Token
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Token.String = String
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Token.Number = Number
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# SQL specific tokens
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DML = Keyword.DML
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DDL = Keyword.DDL
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CTE = Keyword.CTE
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