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schreadr.cpp

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00001 // +-------------------------------------------------------------------------+
00002 // |               I__n__t__e__L__i__b           0.6.10 development          |
00003 // | Copyright (c) Andrey Vikt. Stolyarov <crocodil_AT_croco.net> 2000-2007. |
00004 // |                                                                         |
00005 // | This is free software. The library part is available under              |
00006 // |                               GNU LESSER GENERAL PUBLIC LICENSE v.2.1.  |
00007 // | GNU LGPL v2.1 is found in docs/gnu_gpl2.txt,  or at  http://www.gnu.org |
00008 // |     Please see also docs/readme.txt and visit http://www.intelib.org    |
00009 // |                                                                         |
00010 // | !!! THERE IS NO WARRANTY OF ANY KIND, NEITHER EXPRESSED NOR IMPLIED !!! |
00011 // +-------------------------------------------------------------------------+
00012 
00013 
00014 
00015 
00016 #include "../sexpress/svector.hpp"
00017 #include "../sexpress/shashtbl.hpp"
00018 #include "scheme.hpp"
00019 #include "schreadr.hpp"
00020 
00022 // transformer
00023 
00024 static SReference QuoteExpression(const SReference &ref)
00025 {
00026     return ~(SchReference(ref));
00027 }
00028 
00029 static SReference InvalidLexem(const char *)
00030 {
00031     static SLabel inv("#<UNREADABLE-TOKEN>");
00032     return inv;
00033 }
00034 
00036 // SchemeReader
00037 
00038 SchemeReader::SchemeReader()
00039 {
00040     AddStringLiteral("#<", '>', InvalidLexem);
00041     AddQuoter("'", QuoteExpression);
00042     add_vectors_to_reader(*this);
00043     add_hashtables_to_reader(*this);
00044     AddDelimiter("#T", *PTheSchemeBooleanTrue);
00045     AddDelimiter("#t", *PTheSchemeBooleanTrue);
00046     AddDelimiter("#F", *PTheSchemeBooleanFalse);
00047     AddDelimiter("#f", *PTheSchemeBooleanFalse);
00048 }
00049 

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