blob: a70ee0032f87b19450ea200d1eb4219d624d4849 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
package bjc.dicelang.ast;
import bjc.utils.funcdata.ITree;
import bjc.dicelang.IDiceExpression;
import bjc.dicelang.ScalarDie;
import bjc.dicelang.ast.nodes.DiceASTType;
import bjc.dicelang.ast.nodes.DiceLiteralNode;
import bjc.dicelang.ast.nodes.IDiceASTNode;
import bjc.dicelang.ast.nodes.ILiteralDiceNode;
import bjc.dicelang.ast.nodes.IntegerLiteralNode;
/**
* Functions that are useful when dealing with dice ASTs
*
* @author ben
*
*/
public class DiceASTUtils {
/**
* Check if a dice AST contains a simple variable reference
*
* @param nameTree
* @return Whether or not a dice AST contains a simple variable
* reference
*/
public static boolean containsSimpleVariable(
ITree<IDiceASTNode> nameTree) {
return nameTree.transformHead((nameNod) -> {
if (nameNod.getType() != DiceASTType.VARIABLE) {
return false;
}
return true;
});
}
/**
* Convert an AST tree to an integer, if possible.
*
* @param tree
* The tree to convert
* @return The tree as an integer
*
* @throws ClassCastException
* if the head of the tree is not a literal (implements
* {@link ILiteralDiceNode})
* @throws UnsupportedOperationException
* if the head of the tree is not optimizable
*/
public static int toInt(ITree<IDiceASTNode> tree) {
return tree.transformHead((node) -> {
return ((ILiteralDiceNode) node).optimize();
});
}
/**
* Convert an AST tree to a dice expression, if possible.
*
* @param tree
* The tree to convert
* @return The tree as a dice expression
*
* @throws ClassCastException
* if the head of the tree is not a literal (implements
* {@link ILiteralDiceNode})
* @throws UnsupportedOperationException
* if the head of the tree is not optimizable
*/
public static IDiceExpression toExpression(ITree<IDiceASTNode> tree) {
ILiteralDiceNode litNode = (ILiteralDiceNode) tree.getHead();
switch (litNode.getLiteralType()) {
case DICE:
return ((DiceLiteralNode) litNode).getValue();
case INTEGER:
return new ScalarDie(
((IntegerLiteralNode) litNode).getValue());
default:
throw new UnsupportedOperationException(
"This type of literal isn't convertable to an expression");
}
}
}
|
