}

			// x[i:...
			// For better error message, don't simply use p.want(_Colon) here (go.dev/issue/47704).
			if !p.got(_Colon) {
				p.syntaxError("expected comma, : or ]")
				p.advance(_Comma, _Colon, _Rbrack)
			}
			p.xnest++
			t := new(SliceExpr)
			t.pos = pos
			t.X = x
			t.Index[0] = i
			if p.tok != _Colon && p.tok != _Rbrack {
				// x[i:j...
				t.Index[1] = p.expr()
			}

	_Arrow    // <-
	_Star     // *

	// delimiters
	_Lparen    // (
	_Lbrack    // [
	_Lbrace    // {
	_Rparen    // )
	_Rbrack    // ]
	_Rbrace    // }
	_Comma     // ,
	_Semi      // ;
	_Colon     // :
	_Dot       // .
	_DotDotDot // ...

	// keywords
	_Break       // break
	_Case        // case
	_Chan        // chan
	_Const       // const
	_Continue    // continue
	_Default     // default

	case *SliceExpr:
		p.print(n.X, _Lbrack)
		if i := n.Index[0]; i != nil {
			p.printNode(i)
		}
		p.print(_Colon)
		if j := n.Index[1]; j != nil {
			p.printNode(j)
		}
		if k := n.Index[2]; k != nil {
			p.print(_Colon, k)
		}
		p.print(_Rbrack)

	case *AssertExpr:
		p.print(n.X, _Dot, _Lparen, n.Type, _Rparen)

	case *TypeSwitchGuard:
		if n.Lhs != nil {

	// delimiters
	{_Lparen, "(", 0, 0},
	{_Lbrack, "[", 0, 0},
	{_Lbrace, "{", 0, 0},
	{_Rparen, ")", 0, 0},
	{_Rbrack, "]", 0, 0},
	{_Rbrace, "}", 0, 0},
	{_Comma, ",", 0, 0},
	{_Semi, ";", 0, 0},
	{_Colon, ":", 0, 0},
	{_Dot, ".", 0, 0},
	{_DotDotDot, "...", 0, 0},

	// keywords
	{_Break, "break", 0, 0},
	{_Case, "case", 0, 0},
	{_Chan, "chan", 0, 0},
	{_Const, "const", 0, 0},

		return true
	}

	// "//[a-z0-9]+:[a-z0-9]"
	// (The // has been removed.)
	colon := strings.Index(c, ":")
	if colon <= 0 || colon+1 >= len(c) {
		return false
	}
	for i := 0; i <= colon+1; i++ {
		if i == colon {
			continue
		}
		b := c[i]
		if !('a' <= b && b <= 'z' || '0' <= b && b <= '9') {
			return false
		}
	}
	return true
}

		line = trimSpace(removeComment(line))
		if len(line) == 0 {
			continue
		}
		colon := bytealg.IndexByteString(line, ':')
		if colon == -1 {
			conf.err = errors.New("no colon on line")
			return conf
		}
		db := trimSpace(line[:colon])
		srcs := line[colon+1:]
		for {
			srcs = trimSpace(srcs)
			if len(srcs) == 0 {
				break
			}

    }

    val singleAnnotation by debug {
        annotationMarker * optional(annotationUseSiteTarget) * unescapedAnnotation
    }

    val multiAnnotation by debug {
        annotationMarker * optional(annotationUseSiteTarget) * listOfUnescapedAnnotations
    }

    val parameter by debug {
        simpleIdentifier * token(COLON) * type
    }

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package p

func _() {
	var ch chan bool
	select {
	default:
	case <-ch { // GCCGO_ERROR "expected colon"
	}           // GC_ERROR "expected :"

		//	tcpdump:x:72:
		listIdx := bytes.LastIndexByte(line, ':')
		if listIdx == -1 || listIdx == len(line)-1 {
			// No commas, or empty group list.
			continue
		}
		if bytes.Count(line[:listIdx], colon) != 2 {
			// Incorrect number of colons.
			continue
		}
		list := line[listIdx+1:]
		// Check the list for user without splitting or copying.

		{"//line\n", valid, filename, 2, 1},        // missing colon
		{"//line foo\n", valid, filename, 2, 1},    // missing colon
		{"  //line foo:\n", valid, filename, 2, 1}, // not a line start
		{"//  line foo:\n", valid, filename, 2, 1}, // space between // and line

		// invalid //line directives with one colon
		{"//line :\n", "invalid line number: ", filename, 1, 9},