| Parser - Does the parsing - i.e it's the brains of the code.
Copyright (C) 2000-2003 murlen.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA
author:
murlen
author:
Joachim Van der Auwera
version:
1.12
version:
modifications by Joachim Van der Auwera
version:
14.08.2001 added support for indexed variables
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20.08.2001 -clean handling of setVar with null value
version:
- cleaner handling of if with null condition
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- make sure running empty script does nothing
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- extra info when throwing an exception (with surrounding lines)
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- changed operator prioritues for && and ||
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- fixed bug in parseIf with handling of nesting of if clauses with else
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- check for missing endif or endwhile (caused infinit loops)
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- check for a null to prevernt excepion in parseExpr
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28.08.2001
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- call to host.getVar() replaced by host.F() (and added
version:
proper exception handling, in that case)
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31.08.2001
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- test on if condition being of correct type re-introduced
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10.09.2001
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- added < <= > >= on strings
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23.11.2001
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- allow adding strings with anything
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04.12.2001
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- allow add/subtract/multiply/divide int with double
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24.04.2002
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- fixed a bug in parsing of nested if clause when one of the nested items contains a
version:
"then" token with the statements on the next line(s) (test for TT_EOL instead of TT_EOF)
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30.04.2002
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- handle all exceptions on all getVarEntry, setVarEntry and callFunctionEntry calls
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06.05.2002
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- error messages now unique
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- TT_EOF handled better in some cases
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05-06.08.2002
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- removed some redundant code
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- introduced parseFunctionEnd to catch functions without return (it worked before, so...)
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21.10.2002
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- added == for FSObject instances
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30.10.2002 object now allowed as function parameter
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07.11.2002 better error handling when parsing an expression
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20.11.2002 make != work for objects
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15.03.2003 getContext() added JVDA
version:
17.09.2003 removed checking for mismatched quotes and brackets, and moved to LineLoader
version:
23.11.2003 recycle LexAnn objects (saves object allocation/release) JVDA
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24.11.2003 some extra (smallish) speed improvements (also to reduce garbage a little bit)
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25.02.2004
version:
- proper evaluation of FSObject with contained boolean/integer for if/while
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- more powerful compare for FSObject instance with something else
version:
14.04.2004 elsif opperator support |
