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    41 

    42 #ifndef PARSER_H

    43 #define PARSER_H

    44 

    45 #include <QStack>

    46 #include "symbols.h"

    47 

    48 QT_BEGIN_NAMESPACE

    49 

    50 class Parser

    51 {

    52 public:

    53     Parser():index(0), displayWarnings(true){}

    54     Symbols symbols;

    55     int index;

    56     bool displayWarnings;

    57 

    58     QStack<QByteArray> currentFilenames;

    59 

    60     inline bool hasNext() const { return (index < symbols.size()); }

    61     inline Token next() { if (index >= symbols.size()) return NOTOKEN; return symbols.at(index++).token; }

    62     bool test(Token);

    63     void next(Token);

    64     void next(Token, const char *msg);

    65     inline void prev() {--index;}

    66     inline Token lookup(int k = 1);

    67     inline const Symbol &symbol_lookup(int k = 1) { return symbols.at(index-1+k);}

    68     inline Token token() { return symbols.at(index-1).token;}

    69     inline QByteArray lexem() { return symbols.at(index-1).lexem();}

    70     inline QByteArray unquotedLexem() { return symbols.at(index-1).unquotedLexem();}

    71     inline const Symbol &symbol() { return symbols.at(index-1);}

    72 

    73     void error(int rollback);

    74     void error(const char *msg = 0);

    75     void warning(const char * = 0);

    76 

    77 };

    78 

    79 inline bool Parser::test(Token token)

    80 {

    81     if (index < symbols.size() && symbols.at(index).token == token) {

    82         ++index;

    83         return true;

    84     }

    85     return false;

    86 }

    87 

    88 inline Token Parser::lookup(int k)

    89 {

    90     const int l = index - 1 + k;

    91     return l < symbols.size() ? symbols.at(l).token : NOTOKEN;

    92 }

    93 

    94 inline void Parser::next(Token token)

    95 {

    96     if (!test(token))

    97         error();

    98 }

    99 

   100 inline void Parser::next(Token token, const char *msg)

   101 {

   102     if (!test(token))

   103         error(msg);

   104 }

   105 

   106 QT_END_NAMESPACE

   107 

   108 #endif