private boolean hasAlternate(JSType type, EquivalenceMethod eqMethod, EqCache eqCache) {
for (JSType alternate : getAlternatesWithoutStructuralTyping()) {
if (alternate.checkEquivalenceHelper(type, eqMethod, eqCache)) {
return true;
}
}
return false;
}
/**
* Two function types are equal if their signatures match. Since they don't have signatures, two
* interfaces are equal if their names match.
*/
boolean checkFunctionEquivalenceHelper(FunctionType that, EquivalenceMethod eqMethod) {
if (isConstructor()) {
if (that.isConstructor()) {
return this == that;
}
return false;
}
if (isInterface()) {
if (that.isInterface()) {
return getReferenceName().equals(that.getReferenceName());
}
return false;
}
if (that.isInterface()) {
return false;
}
return typeOfThis.checkEquivalenceHelper(that.typeOfThis, eqMethod)
&& call.checkArrowEquivalenceHelper(that.call, eqMethod);
}