public VarAddress locate(String name, int fromUpstair, boolean force, int line, int column) {
// local var/const
for (; fromUpstair < stairStack.size(); fromUpstair++) {
VarAddress address = stairStack.peek(fromUpstair).locate(name);
if (address != null) {
return address;
}
}
// global var/const
final GlobalManager globalMgr = this.globalManager;
final int index = globalMgr.getGlobalIndex(name);
if (index >= 0) {
return global(index);
}
if (globalMgr.hasConst(name)) {
return constValue(globalMgr.getConst(name));
}
// failed
if (force) {
throw new ParseException("Can't locate vars: ".concat(name), line, column);
}
// assign at root
return context(root.assignVar(name, line, column));
}
public VarAddress locateAtUpstair(String name, int upstair, int line, int column) {
VarAddress address = stairStack.peek(upstair).locate(name);
if (address != null) {
return address;
}
throw new ParseException("Can't locate vars: ".concat(name), line, column);
}
public void assignConst(String name, Object value, int line, int column) {
stairStack.peek().assignConst(name, value, line, column);
}
public int assignVariant(String name, int line, int column) {
return stairStack.peek().assignVar(name, line, column);
}
public int pop() {
return stairStack.pop().id;
}
public void push() {
push(stairStack.peek().id);
}