result.combine(arg.analyze(s))
		}
		return result

	case sqlFnTrim:
		if e.Trim.TrimChars != nil {
			result.combine(e.Trim.TrimChars.analyze(s))
		}
		if e.Trim.TrimFrom != nil {
			result.combine(e.Trim.TrimFrom.analyze(s))
		}
		return result

	case sqlFnSubstring:
		errVal := fmt.Errorf("Invalid argument(s) to %s", string(funcName))
		result.combine(e.Substring.Expr.analyze(s))
		switch {

   *
   * <pre>{@code
   * CharMatcher.anyOf("ab").trimFrom("abacatbab")
   * }</pre>
   *
   * ... returns {@code "cat"}.
   *
   * <p>Note that:
   *
   * <pre>{@code
   * CharMatcher.inRange('\0', ' ').trimFrom(str)
   * }</pre>
   *
   * ... is equivalent to {@link String#trim()}.
   */
  public String trimFrom(CharSequence sequence) {
    int len = sequence.length();
    int first;

        new LineProcessor<List<String>>() {
          List<String> collector = new ArrayList<>();

          @Override
          public boolean processLine(String line) {
            collector.add(whitespace().trimFrom(line));
            return true;
          }

          @Override
          public List<String> getResult() {
            return collector;
          }
        };
    List<String> result =

   *
   * <pre>{@code
   * CharMatcher.anyOf("ab").trimFrom("abacatbab")
   * }</pre>
   *
   * ... returns {@code "cat"}.
   *
   * <p>Note that:
   *
   * <pre>{@code
   * CharMatcher.inRange('\0', ' ').trimFrom(str)
   * }</pre>
   *
   * ... is equivalent to {@link String#trim()}.
   */
  public String trimFrom(CharSequence sequence) {
    int len = sequence.length();
    int first;

        new LineProcessor<List<String>>() {
          List<String> collector = new ArrayList<>();

          @Override
          public boolean processLine(String line) {
            collector.add(whitespace().trimFrom(line));
            return true;
          }

          @Override
          public List<String> getResult() {
            return collector;
          }
        };
    List<String> result =

// TrimFunc represents TRIM sql function
type TrimFunc struct {
	TrimWhere *string      `parser:" \"TRIM\" \"(\" ( @( \"LEADING\" | \"TRAILING\" | \"BOTH\" ) "`
	TrimChars *PrimaryTerm `parser:"             @@?  "`
	TrimFrom  *PrimaryTerm `parser:"             \"FROM\" )? @@ \")\" "`
}

// DateAddFunc represents the DATE_ADD function
type DateAddFunc struct {

		if cerr != nil {
			return nil, cerr
		}
		inferTypeAsString(charsV)
		chars, ok = charsV.ToString()
		if !ok {
			return nil, errNonStringTrimArg
		}
	}

	fromV, ferr := e.TrimFrom.evalNode(r, tableAlias)
	if ferr != nil {
		return nil, ferr
	}
	inferTypeAsString(fromV)
	from, ok := fromV.ToString()
	if !ok {
		return nil, errNonStringTrimArg
	}

  }

  // enum singleton pattern
  private enum TrimStringFunction implements Function<String, String> {
    INSTANCE;

    @Override
    public String apply(String string) {
      return whitespace().trimFrom(string);
    }
  }

  public void testCompose() {
    Function<String, String> trim = TrimStringFunction.INSTANCE;
    Predicate<String> equalsFoo = Predicates.equalTo("Foo");

  }

  // enum singleton pattern
  private enum TrimStringFunction implements Function<String, String> {
    INSTANCE;

    @Override
    public String apply(String string) {
      return whitespace().trimFrom(string);
    }
  }

  public void testCompose() {
    Function<String, String> trim = TrimStringFunction.INSTANCE;
    Predicate<String> equalsFoo = Predicates.equalTo("Foo");