Merge pull request #598 from Helcaraxan/feature/update-deps

Upgrade logrus / testify to stable versions

1 files changed, 0 insertions, 953 deletions

diff --git a/vendor/github.com/BurntSushi/toml/lex.go b/vendor/github.com/BurntSushi/toml/lex.go
deleted file mode 100644
index f1f4b2de..00000000
--- a/vendor/github.com/BurntSushi/toml/lex.go
+++ /dev/null
@@ -1,953 +0,0 @@
-package toml
-
-import (
-	"fmt"
-	"strings"
-	"unicode"
-	"unicode/utf8"
-)
-
-type itemType int
-
-const (
-	itemError itemType = iota
-	itemNIL            // used in the parser to indicate no type
-	itemEOF
-	itemText
-	itemString
-	itemRawString
-	itemMultilineString
-	itemRawMultilineString
-	itemBool
-	itemInteger
-	itemFloat
-	itemDatetime
-	itemArray // the start of an array
-	itemArrayEnd
-	itemTableStart
-	itemTableEnd
-	itemArrayTableStart
-	itemArrayTableEnd
-	itemKeyStart
-	itemCommentStart
-	itemInlineTableStart
-	itemInlineTableEnd
-)
-
-const (
-	eof              = 0
-	comma            = ','
-	tableStart       = '['
-	tableEnd         = ']'
-	arrayTableStart  = '['
-	arrayTableEnd    = ']'
-	tableSep         = '.'
-	keySep           = '='
-	arrayStart       = '['
-	arrayEnd         = ']'
-	commentStart     = '#'
-	stringStart      = '"'
-	stringEnd        = '"'
-	rawStringStart   = '\''
-	rawStringEnd     = '\''
-	inlineTableStart = '{'
-	inlineTableEnd   = '}'
-)
-
-type stateFn func(lx *lexer) stateFn
-
-type lexer struct {
-	input string
-	start int
-	pos   int
-	line  int
-	state stateFn
-	items chan item
-
-	// Allow for backing up up to three runes.
-	// This is necessary because TOML contains 3-rune tokens (""" and ''').
-	prevWidths [3]int
-	nprev      int // how many of prevWidths are in use
-	// If we emit an eof, we can still back up, but it is not OK to call
-	// next again.
-	atEOF bool
-
-	// A stack of state functions used to maintain context.
-	// The idea is to reuse parts of the state machine in various places.
-	// For example, values can appear at the top level or within arbitrarily
-	// nested arrays. The last state on the stack is used after a value has
-	// been lexed. Similarly for comments.
-	stack []stateFn
-}
-
-type item struct {
-	typ  itemType
-	val  string
-	line int
-}
-
-func (lx *lexer) nextItem() item {
-	for {
-		select {
-		case item := <-lx.items:
-			return item
-		default:
-			lx.state = lx.state(lx)
-		}
-	}
-}
-
-func lex(input string) *lexer {
-	lx := &lexer{
-		input: input,
-		state: lexTop,
-		line:  1,
-		items: make(chan item, 10),
-		stack: make([]stateFn, 0, 10),
-	}
-	return lx
-}
-
-func (lx *lexer) push(state stateFn) {
-	lx.stack = append(lx.stack, state)
-}
-
-func (lx *lexer) pop() stateFn {
-	if len(lx.stack) == 0 {
-		return lx.errorf("BUG in lexer: no states to pop")
-	}
-	last := lx.stack[len(lx.stack)-1]
-	lx.stack = lx.stack[0 : len(lx.stack)-1]
-	return last
-}
-
-func (lx *lexer) current() string {
-	return lx.input[lx.start:lx.pos]
-}
-
-func (lx *lexer) emit(typ itemType) {
-	lx.items <- item{typ, lx.current(), lx.line}
-	lx.start = lx.pos
-}
-
-func (lx *lexer) emitTrim(typ itemType) {
-	lx.items <- item{typ, strings.TrimSpace(lx.current()), lx.line}
-	lx.start = lx.pos
-}
-
-func (lx *lexer) next() (r rune) {
-	if lx.atEOF {
-		panic("next called after EOF")
-	}
-	if lx.pos >= len(lx.input) {
-		lx.atEOF = true
-		return eof
-	}
-
-	if lx.input[lx.pos] == '\n' {
-		lx.line++
-	}
-	lx.prevWidths[2] = lx.prevWidths[1]
-	lx.prevWidths[1] = lx.prevWidths[0]
-	if lx.nprev < 3 {
-		lx.nprev++
-	}
-	r, w := utf8.DecodeRuneInString(lx.input[lx.pos:])
-	lx.prevWidths[0] = w
-	lx.pos += w
-	return r
-}
-
-// ignore skips over the pending input before this point.
-func (lx *lexer) ignore() {
-	lx.start = lx.pos
-}
-
-// backup steps back one rune. Can be called only twice between calls to next.
-func (lx *lexer) backup() {
-	if lx.atEOF {
-		lx.atEOF = false
-		return
-	}
-	if lx.nprev < 1 {
-		panic("backed up too far")
-	}
-	w := lx.prevWidths[0]
-	lx.prevWidths[0] = lx.prevWidths[1]
-	lx.prevWidths[1] = lx.prevWidths[2]
-	lx.nprev--
-	lx.pos -= w
-	if lx.pos < len(lx.input) && lx.input[lx.pos] == '\n' {
-		lx.line--
-	}
-}
-
-// accept consumes the next rune if it's equal to `valid`.
-func (lx *lexer) accept(valid rune) bool {
-	if lx.next() == valid {
-		return true
-	}
-	lx.backup()
-	return false
-}
-
-// peek returns but does not consume the next rune in the input.
-func (lx *lexer) peek() rune {
-	r := lx.next()
-	lx.backup()
-	return r
-}
-
-// skip ignores all input that matches the given predicate.
-func (lx *lexer) skip(pred func(rune) bool) {
-	for {
-		r := lx.next()
-		if pred(r) {
-			continue
-		}
-		lx.backup()
-		lx.ignore()
-		return
-	}
-}
-
-// errorf stops all lexing by emitting an error and returning `nil`.
-// Note that any value that is a character is escaped if it's a special
-// character (newlines, tabs, etc.).
-func (lx *lexer) errorf(format string, values ...interface{}) stateFn {
-	lx.items <- item{
-		itemError,
-		fmt.Sprintf(format, values...),
-		lx.line,
-	}
-	return nil
-}
-
-// lexTop consumes elements at the top level of TOML data.
-func lexTop(lx *lexer) stateFn {
-	r := lx.next()
-	if isWhitespace(r) || isNL(r) {
-		return lexSkip(lx, lexTop)
-	}
-	switch r {
-	case commentStart:
-		lx.push(lexTop)
-		return lexCommentStart
-	case tableStart:
-		return lexTableStart
-	case eof:
-		if lx.pos > lx.start {
-			return lx.errorf("unexpected EOF")
-		}
-		lx.emit(itemEOF)
-		return nil
-	}
-
-	// At this point, the only valid item can be a key, so we back up
-	// and let the key lexer do the rest.
-	lx.backup()
-	lx.push(lexTopEnd)
-	return lexKeyStart
-}
-
-// lexTopEnd is entered whenever a top-level item has been consumed. (A value
-// or a table.) It must see only whitespace, and will turn back to lexTop
-// upon a newline. If it sees EOF, it will quit the lexer successfully.
-func lexTopEnd(lx *lexer) stateFn {
-	r := lx.next()
-	switch {
-	case r == commentStart:
-		// a comment will read to a newline for us.
-		lx.push(lexTop)
-		return lexCommentStart
-	case isWhitespace(r):
-		return lexTopEnd
-	case isNL(r):
-		lx.ignore()
-		return lexTop
-	case r == eof:
-		lx.emit(itemEOF)
-		return nil
-	}
-	return lx.errorf("expected a top-level item to end with a newline, "+
-		"comment, or EOF, but got %q instead", r)
-}
-
-// lexTable lexes the beginning of a table. Namely, it makes sure that
-// it starts with a character other than '.' and ']'.
-// It assumes that '[' has already been consumed.
-// It also handles the case that this is an item in an array of tables.
-// e.g., '[[name]]'.
-func lexTableStart(lx *lexer) stateFn {
-	if lx.peek() == arrayTableStart {
-		lx.next()
-		lx.emit(itemArrayTableStart)
-		lx.push(lexArrayTableEnd)
-	} else {
-		lx.emit(itemTableStart)
-		lx.push(lexTableEnd)
-	}
-	return lexTableNameStart
-}
-
-func lexTableEnd(lx *lexer) stateFn {
-	lx.emit(itemTableEnd)
-	return lexTopEnd
-}
-
-func lexArrayTableEnd(lx *lexer) stateFn {
-	if r := lx.next(); r != arrayTableEnd {
-		return lx.errorf("expected end of table array name delimiter %q, "+
-			"but got %q instead", arrayTableEnd, r)
-	}
-	lx.emit(itemArrayTableEnd)
-	return lexTopEnd
-}
-
-func lexTableNameStart(lx *lexer) stateFn {
-	lx.skip(isWhitespace)
-	switch r := lx.peek(); {
-	case r == tableEnd || r == eof:
-		return lx.errorf("unexpected end of table name " +
-			"(table names cannot be empty)")
-	case r == tableSep:
-		return lx.errorf("unexpected table separator " +
-			"(table names cannot be empty)")
-	case r == stringStart || r == rawStringStart:
-		lx.ignore()
-		lx.push(lexTableNameEnd)
-		return lexValue // reuse string lexing
-	default:
-		return lexBareTableName
-	}
-}
-
-// lexBareTableName lexes the name of a table. It assumes that at least one
-// valid character for the table has already been read.
-func lexBareTableName(lx *lexer) stateFn {
-	r := lx.next()
-	if isBareKeyChar(r) {
-		return lexBareTableName
-	}
-	lx.backup()
-	lx.emit(itemText)
-	return lexTableNameEnd
-}
-
-// lexTableNameEnd reads the end of a piece of a table name, optionally
-// consuming whitespace.
-func lexTableNameEnd(lx *lexer) stateFn {
-	lx.skip(isWhitespace)
-	switch r := lx.next(); {
-	case isWhitespace(r):
-		return lexTableNameEnd
-	case r == tableSep:
-		lx.ignore()
-		return lexTableNameStart
-	case r == tableEnd:
-		return lx.pop()
-	default:
-		return lx.errorf("expected '.' or ']' to end table name, "+
-			"but got %q instead", r)
-	}
-}
-
-// lexKeyStart consumes a key name up until the first non-whitespace character.
-// lexKeyStart will ignore whitespace.
-func lexKeyStart(lx *lexer) stateFn {
-	r := lx.peek()
-	switch {
-	case r == keySep:
-		return lx.errorf("unexpected key separator %q", keySep)
-	case isWhitespace(r) || isNL(r):
-		lx.next()
-		return lexSkip(lx, lexKeyStart)
-	case r == stringStart || r == rawStringStart:
-		lx.ignore()
-		lx.emit(itemKeyStart)
-		lx.push(lexKeyEnd)
-		return lexValue // reuse string lexing
-	default:
-		lx.ignore()
-		lx.emit(itemKeyStart)
-		return lexBareKey
-	}
-}
-
-// lexBareKey consumes the text of a bare key. Assumes that the first character
-// (which is not whitespace) has not yet been consumed.
-func lexBareKey(lx *lexer) stateFn {
-	switch r := lx.next(); {
-	case isBareKeyChar(r):
-		return lexBareKey
-	case isWhitespace(r):
-		lx.backup()
-		lx.emit(itemText)
-		return lexKeyEnd
-	case r == keySep:
-		lx.backup()
-		lx.emit(itemText)
-		return lexKeyEnd
-	default:
-		return lx.errorf("bare keys cannot contain %q", r)
-	}
-}
-
-// lexKeyEnd consumes the end of a key and trims whitespace (up to the key
-// separator).
-func lexKeyEnd(lx *lexer) stateFn {
-	switch r := lx.next(); {
-	case r == keySep:
-		return lexSkip(lx, lexValue)
-	case isWhitespace(r):
-		return lexSkip(lx, lexKeyEnd)
-	default:
-		return lx.errorf("expected key separator %q, but got %q instead",
-			keySep, r)
-	}
-}
-
-// lexValue starts the consumption of a value anywhere a value is expected.
-// lexValue will ignore whitespace.
-// After a value is lexed, the last state on the next is popped and returned.
-func lexValue(lx *lexer) stateFn {
-	// We allow whitespace to precede a value, but NOT newlines.
-	// In array syntax, the array states are responsible for ignoring newlines.
-	r := lx.next()
-	switch {
-	case isWhitespace(r):
-		return lexSkip(lx, lexValue)
-	case isDigit(r):
-		lx.backup() // avoid an extra state and use the same as above
-		return lexNumberOrDateStart
-	}
-	switch r {
-	case arrayStart:
-		lx.ignore()
-		lx.emit(itemArray)
-		return lexArrayValue
-	case inlineTableStart:
-		lx.ignore()
-		lx.emit(itemInlineTableStart)
-		return lexInlineTableValue
-	case stringStart:
-		if lx.accept(stringStart) {
-			if lx.accept(stringStart) {
-				lx.ignore() // Ignore """
-				return lexMultilineString
-			}
-			lx.backup()
-		}
-		lx.ignore() // ignore the '"'
-		return lexString
-	case rawStringStart:
-		if lx.accept(rawStringStart) {
-			if lx.accept(rawStringStart) {
-				lx.ignore() // Ignore """
-				return lexMultilineRawString
-			}
-			lx.backup()
-		}
-		lx.ignore() // ignore the "'"
-		return lexRawString
-	case '+', '-':
-		return lexNumberStart
-	case '.': // special error case, be kind to users
-		return lx.errorf("floats must start with a digit, not '.'")
-	}
-	if unicode.IsLetter(r) {
-		// Be permissive here; lexBool will give a nice error if the
-		// user wrote something like
-		//   x = foo
-		// (i.e. not 'true' or 'false' but is something else word-like.)
-		lx.backup()
-		return lexBool
-	}
-	return lx.errorf("expected value but found %q instead", r)
-}
-
-// lexArrayValue consumes one value in an array. It assumes that '[' or ','
-// have already been consumed. All whitespace and newlines are ignored.
-func lexArrayValue(lx *lexer) stateFn {
-	r := lx.next()
-	switch {
-	case isWhitespace(r) || isNL(r):
-		return lexSkip(lx, lexArrayValue)
-	case r == commentStart:
-		lx.push(lexArrayValue)
-		return lexCommentStart
-	case r == comma:
-		return lx.errorf("unexpected comma")
-	case r == arrayEnd:
-		// NOTE(caleb): The spec isn't clear about whether you can have
-		// a trailing comma or not, so we'll allow it.
-		return lexArrayEnd
-	}
-
-	lx.backup()
-	lx.push(lexArrayValueEnd)
-	return lexValue
-}
-
-// lexArrayValueEnd consumes everything between the end of an array value and
-// the next value (or the end of the array): it ignores whitespace and newlines
-// and expects either a ',' or a ']'.
-func lexArrayValueEnd(lx *lexer) stateFn {
-	r := lx.next()
-	switch {
-	case isWhitespace(r) || isNL(r):
-		return lexSkip(lx, lexArrayValueEnd)
-	case r == commentStart:
-		lx.push(lexArrayValueEnd)
-		return lexCommentStart
-	case r == comma:
-		lx.ignore()
-		return lexArrayValue // move on to the next value
-	case r == arrayEnd:
-		return lexArrayEnd
-	}
-	return lx.errorf(
-		"expected a comma or array terminator %q, but got %q instead",
-		arrayEnd, r,
-	)
-}
-
-// lexArrayEnd finishes the lexing of an array.
-// It assumes that a ']' has just been consumed.
-func lexArrayEnd(lx *lexer) stateFn {
-	lx.ignore()
-	lx.emit(itemArrayEnd)
-	return lx.pop()
-}
-
-// lexInlineTableValue consumes one key/value pair in an inline table.
-// It assumes that '{' or ',' have already been consumed. Whitespace is ignored.
-func lexInlineTableValue(lx *lexer) stateFn {
-	r := lx.next()
-	switch {
-	case isWhitespace(r):
-		return lexSkip(lx, lexInlineTableValue)
-	case isNL(r):
-		return lx.errorf("newlines not allowed within inline tables")
-	case r == commentStart:
-		lx.push(lexInlineTableValue)
-		return lexCommentStart
-	case r == comma:
-		return lx.errorf("unexpected comma")
-	case r == inlineTableEnd:
-		return lexInlineTableEnd
-	}
-	lx.backup()
-	lx.push(lexInlineTableValueEnd)
-	return lexKeyStart
-}
-
-// lexInlineTableValueEnd consumes everything between the end of an inline table
-// key/value pair and the next pair (or the end of the table):
-// it ignores whitespace and expects either a ',' or a '}'.
-func lexInlineTableValueEnd(lx *lexer) stateFn {
-	r := lx.next()
-	switch {
-	case isWhitespace(r):
-		return lexSkip(lx, lexInlineTableValueEnd)
-	case isNL(r):
-		return lx.errorf("newlines not allowed within inline tables")
-	case r == commentStart:
-		lx.push(lexInlineTableValueEnd)
-		return lexCommentStart
-	case r == comma:
-		lx.ignore()
-		return lexInlineTableValue
-	case r == inlineTableEnd:
-		return lexInlineTableEnd
-	}
-	return lx.errorf("expected a comma or an inline table terminator %q, "+
-		"but got %q instead", inlineTableEnd, r)
-}
-
-// lexInlineTableEnd finishes the lexing of an inline table.
-// It assumes that a '}' has just been consumed.
-func lexInlineTableEnd(lx *lexer) stateFn {
-	lx.ignore()
-	lx.emit(itemInlineTableEnd)
-	return lx.pop()
-}
-
-// lexString consumes the inner contents of a string. It assumes that the
-// beginning '"' has already been consumed and ignored.
-func lexString(lx *lexer) stateFn {
-	r := lx.next()
-	switch {
-	case r == eof:
-		return lx.errorf("unexpected EOF")
-	case isNL(r):
-		return lx.errorf("strings cannot contain newlines")
-	case r == '\\':
-		lx.push(lexString)
-		return lexStringEscape
-	case r == stringEnd:
-		lx.backup()
-		lx.emit(itemString)
-		lx.next()
-		lx.ignore()
-		return lx.pop()
-	}
-	return lexString
-}
-
-// lexMultilineString consumes the inner contents of a string. It assumes that
-// the beginning '"""' has already been consumed and ignored.
-func lexMultilineString(lx *lexer) stateFn {
-	switch lx.next() {
-	case eof:
-		return lx.errorf("unexpected EOF")
-	case '\\':
-		return lexMultilineStringEscape
-	case stringEnd:
-		if lx.accept(stringEnd) {
-			if lx.accept(stringEnd) {
-				lx.backup()
-				lx.backup()
-				lx.backup()
-				lx.emit(itemMultilineString)
-				lx.next()
-				lx.next()
-				lx.next()
-				lx.ignore()
-				return lx.pop()
-			}
-			lx.backup()
-		}
-	}
-	return lexMultilineString
-}
-
-// lexRawString consumes a raw string. Nothing can be escaped in such a string.
-// It assumes that the beginning "'" has already been consumed and ignored.
-func lexRawString(lx *lexer) stateFn {
-	r := lx.next()
-	switch {
-	case r == eof:
-		return lx.errorf("unexpected EOF")
-	case isNL(r):
-		return lx.errorf("strings cannot contain newlines")
-	case r == rawStringEnd:
-		lx.backup()
-		lx.emit(itemRawString)
-		lx.next()
-		lx.ignore()
-		return lx.pop()
-	}
-	return lexRawString
-}
-
-// lexMultilineRawString consumes a raw string. Nothing can be escaped in such
-// a string. It assumes that the beginning "'''" has already been consumed and
-// ignored.
-func lexMultilineRawString(lx *lexer) stateFn {
-	switch lx.next() {
-	case eof:
-		return lx.errorf("unexpected EOF")
-	case rawStringEnd:
-		if lx.accept(rawStringEnd) {
-			if lx.accept(rawStringEnd) {
-				lx.backup()
-				lx.backup()
-				lx.backup()
-				lx.emit(itemRawMultilineString)
-				lx.next()
-				lx.next()
-				lx.next()
-				lx.ignore()
-				return lx.pop()
-			}
-			lx.backup()
-		}
-	}
-	return lexMultilineRawString
-}
-
-// lexMultilineStringEscape consumes an escaped character. It assumes that the
-// preceding '\\' has already been consumed.
-func lexMultilineStringEscape(lx *lexer) stateFn {
-	// Handle the special case first:
-	if isNL(lx.next()) {
-		return lexMultilineString
-	}
-	lx.backup()
-	lx.push(lexMultilineString)
-	return lexStringEscape(lx)
-}
-
-func lexStringEscape(lx *lexer) stateFn {
-	r := lx.next()
-	switch r {
-	case 'b':
-		fallthrough
-	case 't':
-		fallthrough
-	case 'n':
-		fallthrough
-	case 'f':
-		fallthrough
-	case 'r':
-		fallthrough
-	case '"':
-		fallthrough
-	case '\\':
-		return lx.pop()
-	case 'u':
-		return lexShortUnicodeEscape
-	case 'U':
-		return lexLongUnicodeEscape
-	}
-	return lx.errorf("invalid escape character %q; only the following "+
-		"escape characters are allowed: "+
-		`\b, \t, \n, \f, \r, \", \\, \uXXXX, and \UXXXXXXXX`, r)
-}
-
-func lexShortUnicodeEscape(lx *lexer) stateFn {
-	var r rune
-	for i := 0; i < 4; i++ {
-		r = lx.next()
-		if !isHexadecimal(r) {
-			return lx.errorf(`expected four hexadecimal digits after '\u', `+
-				"but got %q instead", lx.current())
-		}
-	}
-	return lx.pop()
-}
-
-func lexLongUnicodeEscape(lx *lexer) stateFn {
-	var r rune
-	for i := 0; i < 8; i++ {
-		r = lx.next()
-		if !isHexadecimal(r) {
-			return lx.errorf(`expected eight hexadecimal digits after '\U', `+
-				"but got %q instead", lx.current())
-		}
-	}
-	return lx.pop()
-}
-
-// lexNumberOrDateStart consumes either an integer, a float, or datetime.
-func lexNumberOrDateStart(lx *lexer) stateFn {
-	r := lx.next()
-	if isDigit(r) {
-		return lexNumberOrDate
-	}
-	switch r {
-	case '_':
-		return lexNumber
-	case 'e', 'E':
-		return lexFloat
-	case '.':
-		return lx.errorf("floats must start with a digit, not '.'")
-	}
-	return lx.errorf("expected a digit but got %q", r)
-}
-
-// lexNumberOrDate consumes either an integer, float or datetime.
-func lexNumberOrDate(lx *lexer) stateFn {
-	r := lx.next()
-	if isDigit(r) {
-		return lexNumberOrDate
-	}
-	switch r {
-	case '-':
-		return lexDatetime
-	case '_':
-		return lexNumber
-	case '.', 'e', 'E':
-		return lexFloat
-	}
-
-	lx.backup()
-	lx.emit(itemInteger)
-	return lx.pop()
-}
-
-// lexDatetime consumes a Datetime, to a first approximation.
-// The parser validates that it matches one of the accepted formats.
-func lexDatetime(lx *lexer) stateFn {
-	r := lx.next()
-	if isDigit(r) {
-		return lexDatetime
-	}
-	switch r {
-	case '-', 'T', ':', '.', 'Z':
-		return lexDatetime
-	}
-
-	lx.backup()
-	lx.emit(itemDatetime)
-	return lx.pop()
-}
-
-// lexNumberStart consumes either an integer or a float. It assumes that a sign
-// has already been read, but that *no* digits have been consumed.
-// lexNumberStart will move to the appropriate integer or float states.
-func lexNumberStart(lx *lexer) stateFn {
-	// We MUST see a digit. Even floats have to start with a digit.
-	r := lx.next()
-	if !isDigit(r) {
-		if r == '.' {
-			return lx.errorf("floats must start with a digit, not '.'")
-		}
-		return lx.errorf("expected a digit but got %q", r)
-	}
-	return lexNumber
-}
-
-// lexNumber consumes an integer or a float after seeing the first digit.
-func lexNumber(lx *lexer) stateFn {
-	r := lx.next()
-	if isDigit(r) {
-		return lexNumber
-	}
-	switch r {
-	case '_':
-		return lexNumber
-	case '.', 'e', 'E':
-		return lexFloat
-	}
-
-	lx.backup()
-	lx.emit(itemInteger)
-	return lx.pop()
-}
-
-// lexFloat consumes the elements of a float. It allows any sequence of
-// float-like characters, so floats emitted by the lexer are only a first
-// approximation and must be validated by the parser.
-func lexFloat(lx *lexer) stateFn {
-	r := lx.next()
-	if isDigit(r) {
-		return lexFloat
-	}
-	switch r {
-	case '_', '.', '-', '+', 'e', 'E':
-		return lexFloat
-	}
-
-	lx.backup()
-	lx.emit(itemFloat)
-	return lx.pop()
-}
-
-// lexBool consumes a bool string: 'true' or 'false.
-func lexBool(lx *lexer) stateFn {
-	var rs []rune
-	for {
-		r := lx.next()
-		if r == eof || isWhitespace(r) || isNL(r) {
-			lx.backup()
-			break
-		}
-		rs = append(rs, r)
-	}
-	s := string(rs)
-	switch s {
-	case "true", "false":
-		lx.emit(itemBool)
-		return lx.pop()
-	}
-	return lx.errorf("expected value but found %q instead", s)
-}
-
-// lexCommentStart begins the lexing of a comment. It will emit
-// itemCommentStart and consume no characters, passing control to lexComment.
-func lexCommentStart(lx *lexer) stateFn {
-	lx.ignore()
-	lx.emit(itemCommentStart)
-	return lexComment
-}
-
-// lexComment lexes an entire comment. It assumes that '#' has been consumed.
-// It will consume *up to* the first newline character, and pass control
-// back to the last state on the stack.
-func lexComment(lx *lexer) stateFn {
-	r := lx.peek()
-	if isNL(r) || r == eof {
-		lx.emit(itemText)
-		return lx.pop()
-	}
-	lx.next()
-	return lexComment
-}
-
-// lexSkip ignores all slurped input and moves on to the next state.
-func lexSkip(lx *lexer, nextState stateFn) stateFn {
-	return func(lx *lexer) stateFn {
-		lx.ignore()
-		return nextState
-	}
-}
-
-// isWhitespace returns true if `r` is a whitespace character according
-// to the spec.
-func isWhitespace(r rune) bool {
-	return r == '\t' || r == ' '
-}
-
-func isNL(r rune) bool {
-	return r == '\n' || r == '\r'
-}
-
-func isDigit(r rune) bool {
-	return r >= '0' && r <= '9'
-}
-
-func isHexadecimal(r rune) bool {
-	return (r >= '0' && r <= '9') ||
-		(r >= 'a' && r <= 'f') ||
-		(r >= 'A' && r <= 'F')
-}
-
-func isBareKeyChar(r rune) bool {
-	return (r >= 'A' && r <= 'Z') ||
-		(r >= 'a' && r <= 'z') ||
-		(r >= '0' && r <= '9') ||
-		r == '_' ||
-		r == '-'
-}
-
-func (itype itemType) String() string {
-	switch itype {
-	case itemError:
-		return "Error"
-	case itemNIL:
-		return "NIL"
-	case itemEOF:
-		return "EOF"
-	case itemText:
-		return "Text"
-	case itemString, itemRawString, itemMultilineString, itemRawMultilineString:
-		return "String"
-	case itemBool:
-		return "Bool"
-	case itemInteger:
-		return "Integer"
-	case itemFloat:
-		return "Float"
-	case itemDatetime:
-		return "DateTime"
-	case itemTableStart:
-		return "TableStart"
-	case itemTableEnd:
-		return "TableEnd"
-	case itemKeyStart:
-		return "KeyStart"
-	case itemArray:
-		return "Array"
-	case itemArrayEnd:
-		return "ArrayEnd"
-	case itemCommentStart:
-		return "CommentStart"
-	}
-	panic(fmt.Sprintf("BUG: Unknown type '%d'.", int(itype)))
-}
-
-func (item item) String() string {
-	return fmt.Sprintf("(%s, %s)", item.typ.String(), item.val)
-}