public Boolean variableExists(String name) {
Block block = this;
while (block.getParent() != null) {
for (Variable var : block.getVariables()) {
if (var.getName().equals(name)) return true;
}
block = block.getParent();
}
return false;
}
public Variable getVariable(String name) throws SyntaxException {
Block block = this;
while (block != null) {
for (Variable var : block.getVariables()) {
if (var.getName().equals(name)) return var;
}
block = block.getParent();
}
throw new SyntaxException("No variable named '" + name + "'.");
}