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39
40#ifndef QSCRIPTSYNTAXCHECKER_H
41#define QSCRIPTSYNTAXCHECKER_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <QtCore/qstring.h>
55
56#include "qscriptgrammar_p.h"
57
58#include <stdlib.h>
59
60QT_BEGIN_NAMESPACE
61
62namespace QScript {
63
64class Lexer;
65
66class SyntaxChecker: protected QScriptGrammar
67{
68public:
69 enum State {
70 Error,
71 Intermediate,
72 Valid,
73 };
74
75 struct Result {
76 Result(State s, int ln, int col, const QString &msg)
77 : state(s), errorLineNumber(ln), errorColumnNumber(col),
78 errorMessage(msg) {}
79 State state;
80 int errorLineNumber;
81 int errorColumnNumber;
82 QString errorMessage;
83 };
84
85 SyntaxChecker();
86 ~SyntaxChecker();
87
88 Result checkSyntax(const QString &code);
89
90protected:
91 bool automatic(QScript::Lexer *lexer, int token) const;
92 inline void reallocateStack();
93
94protected:
95 int tos;
96 int stack_size;
97 int *state_stack;
98};
99
100inline void SyntaxChecker::reallocateStack()
101{
102 if (! stack_size)
103 stack_size = 128;
104 else
105 stack_size <<= 1;
106
107 state_stack = reinterpret_cast<int*> (realloc(ptr: state_stack, size: stack_size * sizeof(int)));
108}
109
110} // namespace QScript
111
112QT_END_NAMESPACE
113
114#endif
115

source code of qtscript/src/script/parser/qscriptsyntaxchecker_p.h