public void visitClosureExpression(ClosureExpression expression) {
pushState();
expression.setVariableScope(currentScope);
if (expression.isParameterSpecified()) {
Parameter[] parameters = expression.getParameters();
for (Parameter parameter : parameters) {
parameter.setInStaticContext(currentScope.isInStaticContext());
if (parameter.hasInitialExpression()) {
parameter.getInitialExpression().visit(this);
}
declare(parameter, expression);
}
} else if (expression.getParameters() != null) {
Parameter var = new Parameter(ClassHelper.OBJECT_TYPE, "it");
var.setInStaticContext(currentScope.isInStaticContext());
currentScope.putDeclaredVariable(var);
}
super.visitClosureExpression(expression);
markClosureSharedVariables();
popState();
}
private Variable checkVariableNameForDeclaration(String name, Expression expression) {
if ("super".equals(name) || "this".equals(name)) return null;
VariableScope scope = currentScope;
Variable var = new DynamicVariable(name, currentScope.isInStaticContext());
// try to find a declaration of a variable
while (true) {
Variable var1;
var1 = scope.getDeclaredVariable(var.getName());
if (var1 != null) {
var = var1;
break;
}
var1 = scope.getReferencedLocalVariable(var.getName());
if (var1 != null) {
var = var1;
break;
}
var1 = scope.getReferencedClassVariable(var.getName());
if (var1 != null) {
var = var1;
break;
}
ClassNode classScope = scope.getClassScope();
if (classScope != null) {
Variable member = findClassMember(classScope, var.getName());
if (member != null) {
boolean staticScope = currentScope.isInStaticContext() || isSpecialConstructorCall;
boolean staticMember = member.isInStaticContext();
// We don't allow a static context (e.g. a static method) to access
// a non-static variable (e.g. a non-static field).
if (!(staticScope && !staticMember)) var = member;
}
break;
}
scope = scope.getParent();
}
VariableScope end = scope;
scope = currentScope;
while (scope != end) {
if (end.isClassScope()
|| (end.isReferencedClassVariable(name) && end.getDeclaredVariable(name) == null)) {
scope.putReferencedClassVariable(var);
} else {
// var.setClosureSharedVariable(var.isClosureSharedVariable() || inClosure);
scope.putReferencedLocalVariable(var);
}
scope = scope.getParent();
}
return var;
}
private void checkVariableContextAccess(Variable v, Expression expr) {
if (inPropertyExpression || v.isInStaticContext() || !currentScope.isInStaticContext()) return;
String msg =
v.getName()
+ " is declared in a dynamic context, but you tried to"
+ " access it from a static context.";
addError(msg, expr);
// declare a static variable to be able to continue the check
DynamicVariable v2 = new DynamicVariable(v.getName(), currentScope.isInStaticContext());
currentScope.putDeclaredVariable(v2);
}
public void visitCatchStatement(CatchStatement statement) {
pushState();
Parameter p = statement.getVariable();
p.setInStaticContext(currentScope.isInStaticContext());
declare(p, statement);
super.visitCatchStatement(statement);
popState();
}
public void visitForLoop(ForStatement forLoop) {
pushState();
forLoop.setVariableScope(currentScope);
Parameter p = forLoop.getVariable();
p.setInStaticContext(currentScope.isInStaticContext());
if (p != ForStatement.FOR_LOOP_DUMMY) declare(p, forLoop);
super.visitForLoop(forLoop);
popState();
}
/**
* a property on "this", like this.x is transformed to a direct field access, so we need to check
* the static context here
*
* @param pe the property expression to check
*/
private void checkPropertyOnExplicitThis(PropertyExpression pe) {
if (!currentScope.isInStaticContext()) return;
Expression object = pe.getObjectExpression();
if (!(object instanceof VariableExpression)) return;
VariableExpression ve = (VariableExpression) object;
if (!ve.getName().equals("this")) return;
String name = pe.getPropertyAsString();
if (name == null || name.equals("class")) return;
Variable member = findClassMember(currentClass, name);
if (member == null) return;
checkVariableContextAccess(member, pe);
}
private void declare(VariableExpression vex) {
vex.setInStaticContext(currentScope.isInStaticContext());
declare(vex, vex);
vex.setAccessedVariable(vex);
}
private void pushState() {
pushState(currentScope.isInStaticContext());
}