16 lines
475 B
Factor
16 lines
475 B
Factor
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! Copyright (C) 2008 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: lexer sets sequences kernel splitting effects ;
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IN: effects.parser
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: parse-effect ( end -- effect )
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parse-tokens dup { "(" "((" } intersect empty? [
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{ "--" } split1 dup [
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<effect>
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] [
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"Stack effect declaration must contain --" throw
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] if
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] [
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"Stack effect declaration must not contain ( or ((" throw
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] if ;
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