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package bjc.dicelang.v1.ast.nodes;
/**
* Represents a literal of some type in the AST
*
* @author ben
*
*/
public interface ILiteralDiceNode extends IDiceASTNode {
/**
* Check if a token represents a literal, and if so, what type
*
* @param tok
* The token to check
* @return The type the literal would be if it is one, or null otherwise
*/
static DiceLiteralType getLiteralType(String tok) {
String diceGroup = "\\d*d\\d+\\";
String diceGroupOrNumber = "[(?:" + diceGroup + ")(?:\\d+)]";
if(tok.matches("\\A" + diceGroupOrNumber + "?" + "c" + diceGroupOrNumber + "\\Z"))
return DiceLiteralType.DICE;
if(tok.matches("\\A" + diceGroup + "Z")) return DiceLiteralType.DICE;
try {
Integer.parseInt(tok);
return DiceLiteralType.INTEGER;
} catch(NumberFormatException nfex) {
// We don't care about details
// This probably shouldn't return null, but I believe it
// does so
// because where its called checks that. @FIXME
return null;
}
}
/**
* Check if this node can be optimized to a constant
*
* @return Whether or not this node can be optimized to a constant
* @see bjc.dicelang.v1.IDiceExpression#canOptimize()
*/
boolean canOptimize();
/**
* Get the type of literal this node represents
*
* @return The type of literal this node represents
*/
DiceLiteralType getLiteralType();
@Override
default DiceASTType getType() {
return DiceASTType.LITERAL;
}
@Override
default boolean isOperator() {
return false;
}
/**
* Optimize this node to a constant if possible
*
* @return This node in constant form if possible
* @see bjc.dicelang.v1.IDiceExpression#optimize()
*/
int optimize();
}
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