private void CGForNumStat(FuncInfo funcInfo, ForNumStatNode node)
{
funcInfo.EnterScope(true);
LocalVarDecStatNode varDecStatNode = new LocalVarDecStatNode();
varDecStatNode.ExpList = new List <ExpNode>()
{
node.InitExp, node.LimitExp, node.StepExp
};
if (node.StepExp == null)
{
varDecStatNode.ExpList[2] = new ConstExpNode(new Token(TokenType.Number, "1", -1));
}
varDecStatNode.NameList = new List <ConstExpNode>()
{
new ConstExpNode(new Token(TokenType.Identifier, "for_index", -1)),
new ConstExpNode(new Token(TokenType.Identifier, "for_limit", -1)),
new ConstExpNode(new Token(TokenType.Identifier, "for_step", -1))
};
CGLocalVarDefStat(funcInfo, varDecStatNode);
funcInfo.AddLocalVar(node.VarName.name);
int a = funcInfo.UsedReg - 4;
int forPrepPC = funcInfo.EmitForPrep(a, 0);
CGBlock(funcInfo, node.DoBlock.Block);
int forLoopPC = funcInfo.EmitForLoop(a, 0);
funcInfo.FixSBX(forPrepPC, forLoopPC - forPrepPC - 1);
funcInfo.FixSBX(forLoopPC, forPrepPC - forLoopPC - 1);
funcInfo.ExitScope();
}
