157 lines
4.0 KiB
Factor
157 lines
4.0 KiB
Factor
! :folding=indent:collapseFolds=1:
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! $Id$
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!
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! Copyright (C) 2004 Slava Pestov.
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!
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! Redistribution and use in source and binary forms, with or without
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! modification, are permitted provided that the following conditions are met:
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!
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! 1. Redistributions of source code must retain the above copyright notice,
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! this list of conditions and the following disclaimer.
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!
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! 2. Redistributions in binary form must reproduce the above copyright notice,
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! this list of conditions and the following disclaimer in the documentation
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! and/or other materials provided with the distribution.
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!
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! THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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! INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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! FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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! DEVELOPERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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! SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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! PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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! OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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! WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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! OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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! ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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! Parsing words. 'builtins' is a stupid vocabulary name now
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! that it does not contain Java words anymore!
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IN: builtins
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USE: arithmetic
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USE: combinators
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USE: cross-compiler
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USE: errors
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USE: kernel
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USE: lists
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USE: logic
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USE: namespaces
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USE: parser
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USE: stack
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USE: strings
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USE: words
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USE: vectors
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USE: vocabularies
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USE: unparser
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! Constants
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: t t parsed ; parsing
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: f f parsed ; parsing
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! Lists
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: [ [ ] ; parsing
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: ] nreverse parsed ; parsing
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: | ( syntax: | cdr ] )
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#! See the word 'parsed'. We push a special sentinel, and
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#! 'parsed' acts accordingly.
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"|" ; parsing
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! Vectors
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: { f ; parsing
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: } nreverse list>vector parsed ; parsing
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! Do not execute parsing word
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: POSTPONE: ( -- ) scan parse-word parsed ; parsing
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! Colon defs
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: CREATE scan "in" get create ;
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: :
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#! Begin a word definition. Word name follows.
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CREATE [ ] ; parsing
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: ;
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#! End a word definition.
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nreverse
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"cross-compiling" get
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[ compound, ] [ define ] ifte ; parsing
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! Vocabularies
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: DEFER: CREATE drop ; parsing
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: USE: scan "use" cons@ ; parsing
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: IN: scan dup "use" cons@ "in" set ; parsing
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! \x
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: unicode-escape>ch ( -- esc )
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#! Read \u....
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next-ch digit> 16 *
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next-ch digit> + 16 *
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next-ch digit> + 16 *
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next-ch digit> + ;
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: ascii-escape>ch ( ch -- esc )
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[
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[ CHAR: e | CHAR: \e ]
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[ CHAR: n | CHAR: \n ]
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[ CHAR: r | CHAR: \r ]
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[ CHAR: t | CHAR: \t ]
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[ CHAR: s | CHAR: \s ]
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[ CHAR: \s | CHAR: \s ]
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[ CHAR: 0 | CHAR: \0 ]
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[ CHAR: \\ | CHAR: \\ ]
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[ CHAR: \" | CHAR: \" ]
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] assoc ;
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: escape ( ch -- esc )
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dup CHAR: u = [
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drop unicode-escape>ch
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] [
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ascii-escape>ch
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] ifte ;
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! String literal
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: parse-escape ( -- )
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next-ch escape dup [ drop "Bad escape" throw ] unless ;
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: parse-ch ( ch -- ch )
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dup CHAR: \\ = [ drop parse-escape ] when ;
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: parse-string ( -- )
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next-ch dup CHAR: " = [
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drop
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] [
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parse-ch % parse-string
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] ifte ;
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: "
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#! Note the ugly hack to carry the new value of 'pos' from
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#! the <% %> scope up to the original scope.
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<% parse-string "pos" get %> swap "pos" set parsed ; parsing
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! Char literal
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: CHAR: ( -- ) next-word-ch parse-ch parsed ; parsing
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! Complex literal
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: #{
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#! Read #{ real imaginary #}
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scan str>number scan str>number rect> parsed "}" expect ;
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! Comments
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: ( ")" until drop ; parsing
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: ! until-eol drop ; parsing
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: #! until-eol drop ; parsing
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! Reading numbers in other bases
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: BASE: ( base -- )
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#! Read a number in a specific base.
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"base" get >r "base" set scan number, r> "base" set ;
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: HEX: 16 BASE: ; parsing
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: DEC: 10 BASE: ; parsing
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: OCT: 8 BASE: ; parsing
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: BIN: 2 BASE: ; parsing
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