public static final Type BYTE = new Primitive("B", "byte");
public static final Type CHAR = new Primitive("C", "char");
public static final Type SHORT = new Primitive("S", "short");
+ public static final Type NULL = new Null();
public static final Type.Class OBJECT = Type.Class.instance("java.lang.Object");
public static final Type.Class STRING = Type.Class.instance("java.lang.String");
public boolean isClass() { return false; }
public boolean isArray() { return false; }
+ public static Type unify(Type t1, Type t2) {
+ if(t1 == Type.NULL) return t2;
+ if(t2 == Type.NULL) return t1;
+ if((t1 == Type.INT && t2 == Type.BOOLEAN) || (t2 == Type.INT & t1 == Type.BOOLEAN)) return Type.BOOLEAN;
+ if(t1 == t2) return t1;
+ // FIXME: This needs to do a lot more (subclasses, etc)
+ // it probably should be in Context.java
+ return null;
+ }
+
// Protected/Private //////////////////////////////////////////////////////////////////////////////
protected final String descriptor;
this.descriptor = descriptor;
instances.put(descriptor, this);
}
+
+ public static class Null extends Type {
+ protected Null() { super(""); } // not really correct....
+ }
public static class Primitive extends Type {
private String humanReadable;
public Type.Array asArray() { return this; }
public boolean isArray() { return true; }
public String toString() { return base.toString() + "[]"; }
- public Type getElementType() { return Type.fromDescriptor(getDescriptor().substring(0, getDescriptor().length()-1)); }
+ public Type getElementType() { return base; }
}
public static class Class extends Type.Ref {
return p == -1 ? descriptor.substring(1,descriptor.length()-1) : descriptor.substring(p+1,descriptor.length()-1);
}
private static String _initHelper(String s) {
- if (!s.startsWith("L") || !s.endsWith(";")) throw new Error("invalid");
+ if (!s.startsWith("L") || !s.endsWith(";")) throw new Error("invalid: " + s);
return s;
}
String[] components() {