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Update dependencies (#1951)
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Wim
271
vendor/github.com/pelletier/go-toml/v2/unstable/scanner.go
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vendored
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271
vendor/github.com/pelletier/go-toml/v2/unstable/scanner.go
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package unstable
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import "github.com/pelletier/go-toml/v2/internal/characters"
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func scanFollows(b []byte, pattern string) bool {
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n := len(pattern)
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return len(b) >= n && string(b[:n]) == pattern
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}
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func scanFollowsMultilineBasicStringDelimiter(b []byte) bool {
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return scanFollows(b, `"""`)
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}
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func scanFollowsMultilineLiteralStringDelimiter(b []byte) bool {
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return scanFollows(b, `'''`)
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}
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func scanFollowsTrue(b []byte) bool {
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return scanFollows(b, `true`)
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}
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func scanFollowsFalse(b []byte) bool {
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return scanFollows(b, `false`)
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}
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func scanFollowsInf(b []byte) bool {
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return scanFollows(b, `inf`)
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}
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func scanFollowsNan(b []byte) bool {
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return scanFollows(b, `nan`)
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}
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func scanUnquotedKey(b []byte) ([]byte, []byte) {
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// unquoted-key = 1*( ALPHA / DIGIT / %x2D / %x5F ) ; A-Z / a-z / 0-9 / - / _
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for i := 0; i < len(b); i++ {
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if !isUnquotedKeyChar(b[i]) {
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return b[:i], b[i:]
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}
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}
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return b, b[len(b):]
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}
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func isUnquotedKeyChar(r byte) bool {
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return (r >= 'A' && r <= 'Z') || (r >= 'a' && r <= 'z') || (r >= '0' && r <= '9') || r == '-' || r == '_'
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}
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func scanLiteralString(b []byte) ([]byte, []byte, error) {
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// literal-string = apostrophe *literal-char apostrophe
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// apostrophe = %x27 ; ' apostrophe
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// literal-char = %x09 / %x20-26 / %x28-7E / non-ascii
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for i := 1; i < len(b); {
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switch b[i] {
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case '\'':
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return b[:i+1], b[i+1:], nil
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case '\n', '\r':
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return nil, nil, NewParserError(b[i:i+1], "literal strings cannot have new lines")
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}
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size := characters.Utf8ValidNext(b[i:])
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if size == 0 {
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return nil, nil, NewParserError(b[i:i+1], "invalid character")
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}
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i += size
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}
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return nil, nil, NewParserError(b[len(b):], "unterminated literal string")
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}
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func scanMultilineLiteralString(b []byte) ([]byte, []byte, error) {
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// ml-literal-string = ml-literal-string-delim [ newline ] ml-literal-body
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// ml-literal-string-delim
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// ml-literal-string-delim = 3apostrophe
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// ml-literal-body = *mll-content *( mll-quotes 1*mll-content ) [ mll-quotes ]
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//
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// mll-content = mll-char / newline
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// mll-char = %x09 / %x20-26 / %x28-7E / non-ascii
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// mll-quotes = 1*2apostrophe
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for i := 3; i < len(b); {
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switch b[i] {
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case '\'':
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if scanFollowsMultilineLiteralStringDelimiter(b[i:]) {
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i += 3
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// At that point we found 3 apostrophe, and i is the
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// index of the byte after the third one. The scanner
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// needs to be eager, because there can be an extra 2
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// apostrophe that can be accepted at the end of the
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// string.
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if i >= len(b) || b[i] != '\'' {
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return b[:i], b[i:], nil
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}
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i++
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if i >= len(b) || b[i] != '\'' {
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return b[:i], b[i:], nil
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}
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i++
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if i < len(b) && b[i] == '\'' {
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return nil, nil, NewParserError(b[i-3:i+1], "''' not allowed in multiline literal string")
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}
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return b[:i], b[i:], nil
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}
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case '\r':
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if len(b) < i+2 {
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return nil, nil, NewParserError(b[len(b):], `need a \n after \r`)
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}
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if b[i+1] != '\n' {
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return nil, nil, NewParserError(b[i:i+2], `need a \n after \r`)
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}
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i += 2 // skip the \n
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continue
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}
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size := characters.Utf8ValidNext(b[i:])
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if size == 0 {
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return nil, nil, NewParserError(b[i:i+1], "invalid character")
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}
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i += size
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}
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return nil, nil, NewParserError(b[len(b):], `multiline literal string not terminated by '''`)
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}
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func scanWindowsNewline(b []byte) ([]byte, []byte, error) {
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const lenCRLF = 2
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if len(b) < lenCRLF {
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return nil, nil, NewParserError(b, "windows new line expected")
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}
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if b[1] != '\n' {
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return nil, nil, NewParserError(b, `windows new line should be \r\n`)
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}
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return b[:lenCRLF], b[lenCRLF:], nil
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}
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func scanWhitespace(b []byte) ([]byte, []byte) {
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for i := 0; i < len(b); i++ {
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switch b[i] {
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case ' ', '\t':
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continue
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default:
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return b[:i], b[i:]
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}
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}
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return b, b[len(b):]
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}
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//nolint:unparam
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func scanComment(b []byte) ([]byte, []byte, error) {
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// comment-start-symbol = %x23 ; #
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// non-ascii = %x80-D7FF / %xE000-10FFFF
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// non-eol = %x09 / %x20-7F / non-ascii
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//
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// comment = comment-start-symbol *non-eol
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for i := 1; i < len(b); {
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if b[i] == '\n' {
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return b[:i], b[i:], nil
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}
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if b[i] == '\r' {
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if i+1 < len(b) && b[i+1] == '\n' {
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return b[:i+1], b[i+1:], nil
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}
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return nil, nil, NewParserError(b[i:i+1], "invalid character in comment")
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}
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size := characters.Utf8ValidNext(b[i:])
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if size == 0 {
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return nil, nil, NewParserError(b[i:i+1], "invalid character in comment")
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}
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i += size
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}
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return b, b[len(b):], nil
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}
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func scanBasicString(b []byte) ([]byte, bool, []byte, error) {
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// basic-string = quotation-mark *basic-char quotation-mark
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// quotation-mark = %x22 ; "
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// basic-char = basic-unescaped / escaped
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// basic-unescaped = wschar / %x21 / %x23-5B / %x5D-7E / non-ascii
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// escaped = escape escape-seq-char
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escaped := false
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i := 1
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for ; i < len(b); i++ {
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switch b[i] {
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case '"':
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return b[:i+1], escaped, b[i+1:], nil
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case '\n', '\r':
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return nil, escaped, nil, NewParserError(b[i:i+1], "basic strings cannot have new lines")
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case '\\':
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if len(b) < i+2 {
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return nil, escaped, nil, NewParserError(b[i:i+1], "need a character after \\")
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}
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escaped = true
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i++ // skip the next character
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}
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}
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return nil, escaped, nil, NewParserError(b[len(b):], `basic string not terminated by "`)
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}
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func scanMultilineBasicString(b []byte) ([]byte, bool, []byte, error) {
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// ml-basic-string = ml-basic-string-delim [ newline ] ml-basic-body
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// ml-basic-string-delim
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// ml-basic-string-delim = 3quotation-mark
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// ml-basic-body = *mlb-content *( mlb-quotes 1*mlb-content ) [ mlb-quotes ]
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//
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// mlb-content = mlb-char / newline / mlb-escaped-nl
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// mlb-char = mlb-unescaped / escaped
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// mlb-quotes = 1*2quotation-mark
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// mlb-unescaped = wschar / %x21 / %x23-5B / %x5D-7E / non-ascii
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// mlb-escaped-nl = escape ws newline *( wschar / newline )
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escaped := false
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i := 3
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for ; i < len(b); i++ {
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switch b[i] {
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case '"':
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if scanFollowsMultilineBasicStringDelimiter(b[i:]) {
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i += 3
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// At that point we found 3 apostrophe, and i is the
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// index of the byte after the third one. The scanner
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// needs to be eager, because there can be an extra 2
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// apostrophe that can be accepted at the end of the
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// string.
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if i >= len(b) || b[i] != '"' {
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return b[:i], escaped, b[i:], nil
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}
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i++
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if i >= len(b) || b[i] != '"' {
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return b[:i], escaped, b[i:], nil
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}
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i++
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if i < len(b) && b[i] == '"' {
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return nil, escaped, nil, NewParserError(b[i-3:i+1], `""" not allowed in multiline basic string`)
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}
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return b[:i], escaped, b[i:], nil
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}
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case '\\':
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if len(b) < i+2 {
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return nil, escaped, nil, NewParserError(b[len(b):], "need a character after \\")
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}
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escaped = true
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i++ // skip the next character
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case '\r':
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if len(b) < i+2 {
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return nil, escaped, nil, NewParserError(b[len(b):], `need a \n after \r`)
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}
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if b[i+1] != '\n' {
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return nil, escaped, nil, NewParserError(b[i:i+2], `need a \n after \r`)
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}
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i++ // skip the \n
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}
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}
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return nil, escaped, nil, NewParserError(b[len(b):], `multiline basic string not terminated by """`)
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}
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