34 lines
930 B
Factor
34 lines
930 B
Factor
! Copyright (C) 2008 Slava Pestov
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! See http://factorcode.org/license.txt for BSD license.
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USING: peg peg.parsers kernel sequences strings words ;
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IN: io.unix.launcher.parser
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! Our command line parser. Supported syntax:
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! foo bar baz -- simple tokens
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! foo\ bar -- escaping the space
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! 'foo bar' -- quotation
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! "foo bar" -- quotation
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: 'escaped-char' ( -- parser )
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"\\" token any-char 2seq [ second ] action ;
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: 'quoted-char' ( delimiter -- parser' )
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'escaped-char'
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swap [ member? not ] curry satisfy
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2choice ; inline
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: 'quoted' ( delimiter -- parser )
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dup 'quoted-char' repeat0 swap dup surrounded-by ;
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: 'unquoted' ( -- parser ) " '\"" 'quoted-char' repeat1 ;
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: 'argument' ( -- parser )
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"\"" 'quoted'
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"'" 'quoted'
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'unquoted' 3choice
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[ >string ] action ;
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PEG: tokenize-command ( command -- ast/f )
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'argument' " " token repeat1 list-of
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" " token repeat0 swap over pack
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just ;
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