45 lines
970 B
C
45 lines
970 B
C
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/** \file tokenizer.h
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* definitions of input output classes that read and write from string.
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*/
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#ifndef __tokenizer_h__
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#define __tokenizer_h__
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#include "yacasbase.h"
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#include "lispstring.h"
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#include "lispio.h"
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#include "lisphash.h"
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class LispTokenizer : public YacasBase
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{
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public:
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LispTokenizer() : iToken() {}
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/// NextToken returns a string representing the next token,
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/// or an empty list.
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virtual LispString * NextToken(LispInput& aInput,
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LispHashTable& aHashTable);
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virtual ~LispTokenizer(){}
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protected:
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LispString iToken; //Can be used as a token container.
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};
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class CommonLispTokenizer : public LispTokenizer
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{
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public:
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virtual LispString * NextToken(LispInput& aInput,
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LispHashTable& aHashTable);
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};
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// utility functions
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LispBoolean IsDigit(LispChar c);
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LispBoolean IsAlpha(LispChar c);
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LispBoolean IsAlNum(LispChar c);
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LispBoolean IsSymbolic(LispChar c);
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#endif
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