isOpenerNext static method
Tests if the next token in the stream is a left opener ({@link #L_PAREN})
@param tokenizer the tokenizer @return {@code true} if the next token is a {@link #L_PAREN}, otherwise {@code false} @throws IOException if an I/O error occurs
Implementation
static bool isOpenerNext(WKTTokenizer tokenizer) {
WKTToken token = tokenizer.next()!;
tokenizer.pushBack();
return token.type == WKTTokenType.LPAREN;
}