You only give `Depends` a single parameter.

This parameter must be something like a function.

You **don't call it** directly (don't add the parenthesis at the end), you just pass it as a parameter to `Depends()`.

And that function takes parameters in the same way that *path operation functions* do.

/// tip

		Code:           "ParseExpectedLeftParenAfterCast",
		Description:    "Did not find expected the left parenthesis in the SQL expression.",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrParseExpectedLeftParenValueConstructor: {
		Code:           "ParseExpectedLeftParenValueConstructor",
		Description:    "Did not find expected the left parenthesis in the SQL expression.",
		HTTPStatusCode: http.StatusBadRequest,
	},

		tokens = append(tokens, substitution...)
	}
	in.Push(NewSlice(in.Base(), in.Line(), tokens))
}

// argsFor returns a map from formal name to actual value for this argumented macro invocation.
// The opening parenthesis has been absorbed.
func (in *Input) argsFor(macro *Macro) map[string][]Token {
	var args [][]Token
	// One macro argument per iteration. Collect them all and check counts afterwards.
	for argNum := 0; ; argNum++ {

 * side, this yields nine basic types of ranges, enumerated below. (Notation: a square bracket
 * ({@code [ ]}) indicates that the range is closed on that side; a parenthesis ({@code ( )}) means
 * it is either open or unbounded. The construct {@code {x | statement}} is read "the set of all
 * <i>x</i> such that <i>statement</i>.")
 *
 * <blockquote>
 *
 * <table>

		haveConstant = true
	case '(':
		// Could be parenthesized expression or (R). Must be something, though.
		tok := p.next()
		if tok.ScanToken == scanner.EOF {
			p.errorf("missing right parenthesis")
			return
		}
		rname := tok.String()
		p.back()
		haveConstant = !p.atStartOfRegister(rname)
		if !haveConstant {
			p.back() // Put back the '('.
		}
	}
	if haveConstant {
		p.back()

 * side, this yields nine basic types of ranges, enumerated below. (Notation: a square bracket
 * ({@code [ ]}) indicates that the range is closed on that side; a parenthesis ({@code ( )}) means
 * it is either open or unbounded. The construct {@code {x | statement}} is read "the set of all
 * <i>x</i> such that <i>statement</i>.")
 *
 * <blockquote>
 *
 * <table>

			// with '/', which would give us a "//" comment.
			repl := " " + gofmtPos(expr, old.Pos())
			end := fset.Position(old.End())
			// Subtract 1 from the column if we are going to
			// append a close parenthesis. That will set the
			// correct column for the following characters.
			sub := 0
			if r.Name.Kind != "type" {
				sub = 1
			}
			if end.Column > sub {

  public B named(String name) {
    if (name.contains("(")) {
      throw new IllegalArgumentException(
          "Eclipse hides all characters after "
              + "'('; please use '[]' or other characters instead of parentheses");
    }
    this.name = name;
    return self();
  }

  public String getName() {
    return name;
  }

  // Test suppression

  public B named(String name) {
    if (name.contains("(")) {
      throw new IllegalArgumentException(
          "Eclipse hides all characters after "
              + "'('; please use '[]' or other characters instead of parentheses");
    }
    this.name = name;
    return self();
  }

  public String getName() {
    return name;
  }

  // Test suppression

Você fornece um único parâmetro para `Depends`.

Esse parâmetro deve ser algo como uma função.

Você **não chama a função** diretamente (não adicione os parênteses no final), apenas a passe como parâmetro de `Depends()`.

E essa função vai receber os parâmetros da mesma forma que uma *função de operação de rota*.

/// tip | "Dica"