50 lines
897 B
Plaintext
50 lines
897 B
Plaintext
# \[
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# ( ^ ( \]-? | - | X' )
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# | \]-? | - | Y' )
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# X'*
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# -? \]
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#
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# With X' = (X - X | X)
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# Y' = (Y - X | Y)
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# X = [^]-]
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# Y = [^]-^]
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#
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CHAR_CLASS = \[(^(\]-?|-|([^]-]-[^]-]|[^]-]))|\]-?|-|([^]-^]-[^]-]|[^]-^]))([^]-]-[^]-]|[^]-])*-?\]
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#All the escape sequences
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TAB = \\t
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NEWLINE = \\n
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CARRIAGE_RETURN = \\r
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BACKSPACE = \\b
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SPACE = \\s|\s
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BELL = \\a
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FORMFEED = \\f
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VTAB = \\v
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BACKSLASH = \\\\
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ESCAPED_STAR = \\\*
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ESCAPED_PLUS = \\\+
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ESCAPED_PIPE = \\\|
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ESCAPED_LPAREN = \\\(
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ESCAPED_RPAREN = \\\)
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ESCAPED_LBRACKET = \\\[
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ESCAPED_RBRACKET = \\\]
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ESCAPED_QUESTIONMARK = \\\?
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ESCAPED_DOT = \\\.
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# The special chars
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DOT = \.
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STAR = \*
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PLUS = \+
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QUESTIONMARK = \?
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PIPE = \|
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LPAREN = \(
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RPAREN = \)
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# Anything other than these is valid
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# It cannot be ] or [, since those should be handled by CHAR_CLASS
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# If it is a \, it is an invalid escape sequence
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CHAR = [^][\]
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ERROR = .
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