src/script/qscriptsyntaxchecker_p.h

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  41
  42 #ifndef QSCRIPTSYNTAXCHECKER_H
  43 #define QSCRIPTSYNTAXCHECKER_H
  44
  45 //
  46 //  W A R N I N G
  47 //  -------------
  48 //
  49 // This file is not part of the Qt API.  It exists purely as an
  50 // implementation detail.  This header file may change from version to
  51 // version without notice, or even be removed.
  52 //
  53 // We mean it.
  54 //
  55
  56 #include <QtCore/qstring.h>
  57
  58 #ifndef QT_NO_SCRIPT
  59
  60 #include "qscriptgrammar_p.h"
  61
  62 QT_BEGIN_NAMESPACE
  63
  64 namespace QScript {
  65
  66 class Lexer;
  67
  68 class SyntaxChecker: protected QScriptGrammar
  69 {
  70 public:
  71     enum State {
  72         Error,
  73         Intermediate,
  74         Valid
  75     };
  76
  77     struct Result {
  78         Result(State s, int ln, int col, const QString &msg)
  79             : state(s), errorLineNumber(ln), errorColumnNumber(col),
  80               errorMessage(msg) {}
  81         State state;
  82         int errorLineNumber;
  83         int errorColumnNumber;
  84         QString errorMessage;
  85     };
  86
  87     SyntaxChecker();
  88     ~SyntaxChecker();
  89
  90     Result checkSyntax(const QString &code);
  91
  92 protected:
  93     bool automatic(QScript::Lexer *lexer, int token) const;
  94     inline void reallocateStack();
  95
  96 protected:
  97     int tos;
  98     int stack_size;
  99     int *state_stack;
 100 };
 101
 102 inline void SyntaxChecker::reallocateStack()
 103 {
 104     if (! stack_size)
 105         stack_size = 128;
 106     else
 107         stack_size <<= 1;
 108
 109     state_stack = reinterpret_cast<int*> (qRealloc(state_stack, stack_size * sizeof(int)));
 110 }
 111
 112 } // namespace QScript
 113
 114 QT_END_NAMESPACE
 115
 116 #endif // QT_NO_SCRIPT
 117
 118 #endif