Review

18

com/google/javascript/jscomp/ConcreteType$ConcreteFunctionType.java

toString()

class ConcreteType.ConcreteFunctionType {
    /**
     * Informally, a function is represented by
     * {@code function (params): returnType} where the {@code params} is a comma
     * separated list of types, the first one being a special
     * {@code this:T} if the function expects a known type for {@code this}.
     */
    @Override public String toString() {
      StringBuilder b = new StringBuilder(32);
      b.append("function (");
      boolean hasKnownTypeOfThis = !getThisSlot().getType().isNone();
      if (hasKnownTypeOfThis) {
        b.append("this:");
        b.append(getThisSlot().getType().toString());
      }

      Node n = getFirstParameter();
      if (hasKnownTypeOfThis && n != null) {
        b.append(", ");
      }
      for (int i = 0; n != null; ++i, n = n.getNext()) {
        String paramName = n.getString();
        StaticSlot<ConcreteType> var = getScope().getOwnSlot(paramName);
        b.append(var.getType());
        getParameterSlot(i).getType();
        if (n.getNext() != null) {
          b.append(", ");
        }
      }

      b.append(")");
      if (getReturnSlot().getType() != null) {
        b.append(": ");
        b.append(getReturnSlot().getType().toString());
      }
      return b.toString();
    }
}