public ExecutionContext createEvalExecutionContext(JSProgram eval, boolean direct) {
// 10.4.2 (with caller)
ExecutionContext context = null;
Object evalThisBinding = null;
LexicalEnvironment evalLexEnv = null;
LexicalEnvironment evalVarEnv = null;
if (!direct) {
evalThisBinding = getGlobalObject();
evalLexEnv = LexicalEnvironment.newGlobalEnvironment(getGlobalObject());
evalVarEnv = LexicalEnvironment.newGlobalEnvironment(getGlobalObject());
} else {
evalThisBinding = this.thisBinding;
evalLexEnv = this.getLexicalEnvironment();
evalVarEnv = this.getVariableEnvironment();
}
if (eval.isStrict()) {
LexicalEnvironment strictVarEnv =
LexicalEnvironment.newDeclarativeEnvironment(this.getLexicalEnvironment());
evalLexEnv = strictVarEnv;
evalVarEnv = strictVarEnv;
}
context = new ExecutionContext(this, evalLexEnv, evalVarEnv, evalThisBinding, eval.isStrict());
context.performFunctionDeclarationBindings(eval, true);
context.performVariableDeclarationBindings(eval, true);
context.fileName = eval.getFileName();
return context;
}
private void performDeclarationBindingInstantiation(JSFunction function, Object[] arguments) {
// 10.5 (Functions)
String[] names = function.getFormalParameters();
Object v = null;
DeclarativeEnvironmentRecord env =
(DeclarativeEnvironmentRecord) this.variableEnvironment.getRecord();
// * 4
for (int i = 0; i < names.length; ++i) {
if ((i + 1) > arguments.length) {
v = Types.UNDEFINED;
} else {
v = arguments[i];
}
if (!env.hasBinding(this, names[i])) {
env.createMutableBinding(this, names[i], false);
}
env.setMutableBinding(this, names[i], v, function.isStrict());
}
// * 5
performFunctionDeclarationBindings(function, false);
// * 6
if (!env.hasBinding(this, "arguments")) {
// * 7
Arguments argsObj = createArgumentsObject(function, arguments);
if (function.isStrict()) {
env.createImmutableBinding("arguments");
env.initializeImmutableBinding("arguments", argsObj);
} else {
env.createMutableBinding(this, "arguments", false);
env.setMutableBinding(this, "arguments", argsObj, false);
}
}
// * 8
performVariableDeclarationBindings(function, false);
}
private void performDeclarationBindingInstantiation(JSProgram program) {
performFunctionDeclarationBindings(program, false);
performVariableDeclarationBindings(program, false);
}