private Node ParseModExpression()
{
Node node = ParseMultiplicativeExpression();
while((tokenType == TokenType.Percent)){
TokenType op_type = tokenType;
GetToken();
Node right = ParseMultiplicativeExpression();
node = new OPNode(node,right,op_type);
}
return node;
}
//*と/の処理。
private Node ParseMultiplicativeExpression()
{
ShowDebugMessage("ParseMultiplicativeExpression");
Node node = ParseUnaryExpression();
while((tokenType == TokenType.Asterisk) ||
(tokenType == TokenType.Slash)){
TokenType op_type = tokenType;
GetToken();
Node right = ParseUnaryExpression();
node = new OPNode(node,right,op_type);
}
return node;
}
// + と - の処理。
private Node ParseAdditiveExpression()
{
ShowDebugMessage("ParseAdditiveExpression");
// +と-の前に*と/の処理。
Node node = ParseModExpression();
while((tokenType == TokenType.Plus) ||
(tokenType == TokenType.Minus)){
TokenType op_type = tokenType;
GetToken();
Node right = ParseModExpression();
node = new OPNode(node,right,op_type);
}
return node;
}