public Completion executeWith(JSObject withObj, BasicBlock block) {
LexicalEnvironment oldEnv = this.lexicalEnvironment;
LexicalEnvironment withEnv = LexicalEnvironment.newObjectEnvironment(withObj, true, oldEnv);
try {
this.lexicalEnvironment = withEnv;
return block.call(this);
} finally {
this.lexicalEnvironment = oldEnv;
}
}
public Completion executeCatch(BasicBlock block, String identifier, Object thrown) {
// 12.14
LexicalEnvironment oldEnv = this.lexicalEnvironment;
LexicalEnvironment catchEnv = LexicalEnvironment.newDeclarativeEnvironment(oldEnv);
catchEnv.getRecord().createMutableBinding(this, identifier, false);
catchEnv.getRecord().setMutableBinding(this, identifier, thrown, false);
try {
this.lexicalEnvironment = catchEnv;
return block.call(this);
} catch (ThrowException e) {
throw e;
} catch (Throwable t) {
throw new ThrowException(this, t);
} finally {
this.lexicalEnvironment = oldEnv;
}
}