28 lines
767 B
Factor
28 lines
767 B
Factor
! Copyright (C) 2005, 2008 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel math math.order sequences
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combinators.short-circuit ;
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IN: ascii
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: blank? ( ch -- ? ) " \t\n\r" member? ; inline
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: letter? ( ch -- ? ) CHAR: a CHAR: z between? ; inline
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: LETTER? ( ch -- ? ) CHAR: A CHAR: Z between? ; inline
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: digit? ( ch -- ? ) CHAR: 0 CHAR: 9 between? ; inline
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: printable? ( ch -- ? ) CHAR: \s CHAR: ~ between? ; inline
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: control? ( ch -- ? )
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"\0\e\r\n\t\u000008\u00007f" member? ; inline
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: quotable? ( ch -- ? )
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dup printable? [ "\"\\" member? not ] [ drop f ] if ; inline
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: Letter? ( ch -- ? )
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[ [ letter? ] [ LETTER? ] ] 1|| ;
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: alpha? ( ch -- ? )
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[ [ Letter? ] [ digit? ] ] 1|| ;
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