_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

		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.

// fn for each row. readColonFile returns a value, an error, or (nil, nil) if
// the end of the file is reached without a match.
//
// readCols is the minimum number of colon-separated fields that will be passed
// to fn; in a long line additional fields may be silently discarded.
func readColonFile(r io.Reader, fn lineFunc, readCols int) (v any, err error) {
	rd := bufio.NewReader(r)

		case len(hostport):
			// There can't be a ':' behind the ']' now.
			return addrErr(hostport, missingPort)
		case i:
			// The expected result.
		default:
			// Either ']' isn't followed by a colon, or it is
			// followed by a colon that is not the last one.
			if hostport[end+1] == ':' {
				return addrErr(hostport, tooManyColons)
			}
			return addrErr(hostport, missingPort)
		}
		host = hostport[1:end]

			continue
		}
		result[n] = b
		n++
	}

	return result[0:n]
}

var pemStart = []byte("\n-----BEGIN ")
var pemEnd = []byte("\n-----END ")
var pemEndOfLine = []byte("-----")
var colon = []byte(":")

// Decode will find the next PEM formatted block (certificate, private key
// etc) in the input. It returns that block and the remainder of the input. If

        'us%5B%5B%23%3B%C3%BCr:pas%23:%5D()' | 'us[[#;ür' | 'pas#:]()'
        'user'                               | null       | null
    }

    def "username cannot contain colon"() {
        // Known limitation. The user should use the DSL
        when:
        def credentials = extractCredentialsFromUserInfo(new URI("https://us%3Aer:******@****.***"))

        then: