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39 #ifndef QV4COMPILERSCANFUNCTIONS_P_H
40 #define QV4COMPILERSCANFUNCTIONS_P_H
41 
42 //
43 //  W A R N I N G
44 //  -------------
45 //
46 // This file is not part of the Qt API.  It exists purely as an
47 // implementation detail.  This header file may change from version to
48 // version without notice, or even be removed.
49 //
50 // We mean it.
51 //
52 
53 #include <private/qtqmlcompilerglobal_p.h>
54 #include <private/qqmljsastvisitor_p.h>
55 #include <private/qqmljsast_p.h>
56 #include <private/qqmljsengine_p.h>
57 #include <private/qv4compilercontext_p.h>
58 #include <private/qv4util_p.h>
59 #include <QtCore/QStringList>
60 #include <QStack>
61 #include <QScopedValueRollback>
62 
63 QT_BEGIN_NAMESPACE
64 
65 namespace QV4 {
66 
67 namespace Moth {
68 struct Instruction;
69 }
70 
71 namespace CompiledData {
72 struct CompilationUnit;
73 }
74 
75 namespace Compiler {
76 
77 class Codegen;
78 
79 class ScanFunctions: protected QQmlJS::AST::Visitor
80 {
81     typedef QScopedValueRollback<bool> TemporaryBoolAssignment;
82 public:
83     ScanFunctions(Codegen *cg, const QString &sourceCode, ContextType defaultProgramType);
84     void operator()(QQmlJS::AST::Node *node);
85 
86     void enterGlobalEnvironment(ContextType compilationMode);
87     void enterEnvironment(QQmlJS::AST::Node *node, ContextType compilationMode,
88                           const QString &name);
89     void leaveEnvironment();
90 
enterQmlFunction(QQmlJS::AST::FunctionExpression * ast)91     void enterQmlFunction(QQmlJS::AST::FunctionExpression *ast)
92     { enterFunction(ast, false); }
93 
94 protected:
95     using Visitor::visit;
96     using Visitor::endVisit;
97 
98     void checkDirectivePrologue(QQmlJS::AST::StatementList *ast);
99 
100     void checkName(const QStringRef &name, const QQmlJS::SourceLocation &loc);
101 
102     bool visit(QQmlJS::AST::Program *ast) override;
103     void endVisit(QQmlJS::AST::Program *) override;
104 
105     bool visit(QQmlJS::AST::ESModule *ast) override;
106     void endVisit(QQmlJS::AST::ESModule *) override;
107 
108     bool visit(QQmlJS::AST::ExportDeclaration *declaration) override;
109     bool visit(QQmlJS::AST::ImportDeclaration *declaration) override;
110 
111     bool visit(QQmlJS::AST::CallExpression *ast) override;
112     bool visit(QQmlJS::AST::PatternElement *ast) override;
113     bool visit(QQmlJS::AST::IdentifierExpression *ast) override;
114     bool visit(QQmlJS::AST::ExpressionStatement *ast) override;
115     bool visit(QQmlJS::AST::FunctionExpression *ast) override;
116     bool visit(QQmlJS::AST::TemplateLiteral *ast) override;
117     bool visit(QQmlJS::AST::SuperLiteral *) override;
118     bool visit(QQmlJS::AST::FieldMemberExpression *) override;
119     bool visit(QQmlJS::AST::ArrayPattern *) override;
120 
121     bool enterFunction(QQmlJS::AST::FunctionExpression *ast, bool enterName);
122 
123     void endVisit(QQmlJS::AST::FunctionExpression *) override;
124 
125     bool visit(QQmlJS::AST::ObjectPattern *ast) override;
126 
127     bool visit(QQmlJS::AST::PatternProperty *ast) override;
128     void endVisit(QQmlJS::AST::PatternProperty *) override;
129 
130     bool visit(QQmlJS::AST::FunctionDeclaration *ast) override;
131     void endVisit(QQmlJS::AST::FunctionDeclaration *) override;
132 
133     bool visit(QQmlJS::AST::ClassExpression *ast) override;
134     void endVisit(QQmlJS::AST::ClassExpression *) override;
135 
136     bool visit(QQmlJS::AST::ClassDeclaration *ast) override;
137     void endVisit(QQmlJS::AST::ClassDeclaration *) override;
138 
139     bool visit(QQmlJS::AST::DoWhileStatement *ast) override;
140     bool visit(QQmlJS::AST::ForStatement *ast) override;
141     void endVisit(QQmlJS::AST::ForStatement *) override;
142     bool visit(QQmlJS::AST::ForEachStatement *ast) override;
143     void endVisit(QQmlJS::AST::ForEachStatement *) override;
144 
145     bool visit(QQmlJS::AST::ThisExpression *ast) override;
146 
147     bool visit(QQmlJS::AST::Block *ast) override;
148     void endVisit(QQmlJS::AST::Block *ast) override;
149 
150     bool visit(QQmlJS::AST::CaseBlock *ast) override;
151     void endVisit(QQmlJS::AST::CaseBlock *ast) override;
152 
153     bool visit(QQmlJS::AST::Catch *ast) override;
154     void endVisit(QQmlJS::AST::Catch *ast) override;
155 
156     bool visit(QQmlJS::AST::WithStatement *ast) override;
157     void endVisit(QQmlJS::AST::WithStatement *ast) override;
158 
159     void throwRecursionDepthError() override;
160 
161 protected:
162     bool enterFunction(QQmlJS::AST::Node *ast, const QString &name,
163                        QQmlJS::AST::FormalParameterList *formals,
164                        QQmlJS::AST::StatementList *body, bool enterName);
165 
166     void calcEscapingVariables();
167 // fields:
168     Codegen *_cg;
169     const QString _sourceCode;
170     Context *_context;
171     QStack<Context *> _contextStack;
172 
173     bool _allowFuncDecls;
174     ContextType defaultProgramType;
175 
176 private:
177     static constexpr QQmlJS::AST::Node *astNodeForGlobalEnvironment = nullptr;
178 };
179 
180 }
181 
182 }
183 
184 QT_END_NAMESPACE
185 
186 #endif // QV4CODEGEN_P_H
187