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text: add available godoc link
Change-Id: Idbc110cfc4fd6bbbc8b79807ac14abf7b30e0e65 Reviewed-on: https://go-review.googlesource.com/c/go/+/539855 Run-TryBot: shuang cui <imcusg@gmail.com> Reviewed-by: Ian Lance Taylor <iant@google.com> Auto-Submit: Ian Lance Taylor <iant@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: qiulaidongfeng <2645477756@qq.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Carlos Amedee <carlos@golang.org>
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@ -8,7 +8,7 @@
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// existing tools, the NUL character is not allowed. If the first character
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// in the source is a UTF-8 encoded byte order mark (BOM), it is discarded.
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//
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// By default, a Scanner skips white space and Go comments and recognizes all
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// By default, a [Scanner] skips white space and Go comments and recognizes all
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// literals as defined by the Go language specification. It may be
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// customized to recognize only a subset of those literals and to recognize
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// different identifier and white space characters.
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@ -47,7 +47,7 @@ func (pos Position) String() string {
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}
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// Predefined mode bits to control recognition of tokens. For instance,
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// to configure a Scanner such that it only recognizes (Go) identifiers,
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// to configure a [Scanner] such that it only recognizes (Go) identifiers,
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// integers, and skips comments, set the Scanner's Mode field to:
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//
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// ScanIdents | ScanInts | SkipComments
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@ -56,7 +56,7 @@ func (pos Position) String() string {
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// set, unrecognized tokens are not ignored. Instead, the scanner simply
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// returns the respective individual characters (or possibly sub-tokens).
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// For instance, if the mode is ScanIdents (not ScanStrings), the string
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// "foo" is scanned as the token sequence '"' Ident '"'.
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// "foo" is scanned as the token sequence '"' [Ident] '"'.
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//
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// Use GoTokens to configure the Scanner such that it accepts all Go
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// literal tokens including Go identifiers. Comments will be skipped.
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@ -106,13 +106,13 @@ func TokenString(tok rune) string {
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return fmt.Sprintf("%q", string(tok))
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}
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// GoWhitespace is the default value for the Scanner's Whitespace field.
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// GoWhitespace is the default value for the [Scanner]'s Whitespace field.
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// Its value selects Go's white space characters.
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const GoWhitespace = 1<<'\t' | 1<<'\n' | 1<<'\r' | 1<<' '
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const bufLen = 1024 // at least utf8.UTFMax
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// A Scanner implements reading of Unicode characters and tokens from an io.Reader.
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// A Scanner implements reading of Unicode characters and tokens from an [io.Reader].
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type Scanner struct {
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// Input
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src io.Reader
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@ -175,9 +175,9 @@ type Scanner struct {
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Position
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}
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// Init initializes a Scanner with a new source and returns s.
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// Error is set to nil, ErrorCount is set to 0, Mode is set to GoTokens,
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// and Whitespace is set to GoWhitespace.
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// Init initializes a [Scanner] with a new source and returns s.
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// [Scanner.Error] is set to nil, [Scanner.ErrorCount] is set to 0, [Scanner.Mode] is set to [GoTokens],
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// and [Scanner.Whitespace] is set to [GoWhitespace].
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func (s *Scanner) Init(src io.Reader) *Scanner {
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s.src = src
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@ -296,10 +296,10 @@ func (s *Scanner) next() rune {
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}
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// Next reads and returns the next Unicode character.
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// It returns EOF at the end of the source. It reports
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// It returns [EOF] at the end of the source. It reports
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// a read error by calling s.Error, if not nil; otherwise
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// it prints an error message to os.Stderr. Next does not
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// update the Scanner's Position field; use Pos() to
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// it prints an error message to [os.Stderr]. Next does not
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// update the [Scanner.Position] field; use [Scanner.Pos]() to
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// get the current position.
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func (s *Scanner) Next() rune {
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s.tokPos = -1 // don't collect token text
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@ -312,7 +312,7 @@ func (s *Scanner) Next() rune {
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}
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// Peek returns the next Unicode character in the source without advancing
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// the scanner. It returns EOF if the scanner's position is at the last
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// the scanner. It returns [EOF] if the scanner's position is at the last
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// character of the source.
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func (s *Scanner) Peek() rune {
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if s.ch == -2 {
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@ -639,10 +639,10 @@ func (s *Scanner) scanComment(ch rune) rune {
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}
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// Scan reads the next token or Unicode character from source and returns it.
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// It only recognizes tokens t for which the respective Mode bit (1<<-t) is set.
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// It returns EOF at the end of the source. It reports scanner errors (read and
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// It only recognizes tokens t for which the respective [Scanner.Mode] bit (1<<-t) is set.
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// It returns [EOF] at the end of the source. It reports scanner errors (read and
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// token errors) by calling s.Error, if not nil; otherwise it prints an error
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// message to os.Stderr.
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// message to [os.Stderr].
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func (s *Scanner) Scan() rune {
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ch := s.Peek()
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@ -742,8 +742,8 @@ redo:
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}
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// Pos returns the position of the character immediately after
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// the character or token returned by the last call to Next or Scan.
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// Use the Scanner's Position field for the start position of the most
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// the character or token returned by the last call to [Scanner.Next] or [Scanner.Scan].
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// Use the [Scanner.Position] field for the start position of the most
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// recently scanned token.
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func (s *Scanner) Pos() (pos Position) {
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pos.Filename = s.Filename
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@ -766,7 +766,7 @@ func (s *Scanner) Pos() (pos Position) {
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}
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// TokenText returns the string corresponding to the most recently scanned token.
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// Valid after calling Scan and in calls of Scanner.Error.
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// Valid after calling [Scanner.Scan] and in calls of [Scanner.Error].
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func (s *Scanner) TokenText() string {
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if s.tokPos < 0 {
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// no token text
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@ -59,7 +59,7 @@ type cell struct {
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// this may not be true in some fonts or if the string contains combining
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// characters.
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//
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// If DiscardEmptyColumns is set, empty columns that are terminated
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// If [DiscardEmptyColumns] is set, empty columns that are terminated
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// entirely by vertical (or "soft") tabs are discarded. Columns
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// terminated by horizontal (or "hard") tabs are not affected by
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// this flag.
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@ -68,24 +68,24 @@ type cell struct {
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// are passed through. The widths of tags and entities are
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// assumed to be zero (tags) and one (entities) for formatting purposes.
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//
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// A segment of text may be escaped by bracketing it with Escape
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// A segment of text may be escaped by bracketing it with [Escape]
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// characters. The tabwriter passes escaped text segments through
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// unchanged. In particular, it does not interpret any tabs or line
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// breaks within the segment. If the StripEscape flag is set, the
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// breaks within the segment. If the [StripEscape] flag is set, the
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// Escape characters are stripped from the output; otherwise they
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// are passed through as well. For the purpose of formatting, the
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// width of the escaped text is always computed excluding the Escape
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// characters.
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//
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// The formfeed character acts like a newline but it also terminates
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// all columns in the current line (effectively calling Flush). Tab-
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// all columns in the current line (effectively calling [Writer.Flush]). Tab-
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// terminated cells in the next line start new columns. Unless found
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// inside an HTML tag or inside an escaped text segment, formfeed
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// characters appear as newlines in the output.
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//
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// The Writer must buffer input internally, because proper spacing
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// of one line may depend on the cells in future lines. Clients must
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// call Flush when done calling Write.
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// call Flush when done calling [Writer.Write].
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type Writer struct {
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// configuration
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output io.Writer
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@ -192,7 +192,7 @@ const (
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Debug
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)
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// A Writer must be initialized with a call to Init. The first parameter (output)
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// A [Writer] must be initialized with a call to Init. The first parameter (output)
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// specifies the filter output. The remaining parameters control the formatting:
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//
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// minwidth minimal cell width including any padding
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@ -480,8 +480,8 @@ func (b *Writer) handlePanic(err *error, op string) {
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}
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}
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// Flush should be called after the last call to Write to ensure
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// that any data buffered in the Writer is written to output. Any
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// Flush should be called after the last call to [Writer.Write] to ensure
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// that any data buffered in the [Writer] is written to output. Any
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// incomplete escape sequence at the end is considered
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// complete for formatting purposes.
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func (b *Writer) Flush() error {
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@ -593,7 +593,7 @@ func (b *Writer) Write(buf []byte) (n int, err error) {
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return
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}
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// NewWriter allocates and initializes a new tabwriter.Writer.
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// NewWriter allocates and initializes a new [Writer].
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// The parameters are the same as for the Init function.
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func NewWriter(output io.Writer, minwidth, tabwidth, padding int, padchar byte, flags uint) *Writer {
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return new(Writer).Init(output, minwidth, tabwidth, padding, padchar, flags)
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// A template may be executed safely in parallel, although if parallel
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// executions share a Writer the output may be interleaved.
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//
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// If data is a reflect.Value, the template applies to the concrete
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// value that the reflect.Value holds, as in fmt.Print.
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// If data is a [reflect.Value], the template applies to the concrete
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// value that the reflect.Value holds, as in [fmt.Print].
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func (t *Template) Execute(wr io.Writer, data any) error {
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return t.execute(wr, data)
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}
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@ -228,7 +228,7 @@ func (t *Template) execute(wr io.Writer, data any) (err error) {
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// DefinedTemplates returns a string listing the defined templates,
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// prefixed by the string "; defined templates are: ". If there are none,
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// it returns the empty string. For generating an error message here
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// and in html/template.
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// and in [html/template].
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func (t *Template) DefinedTemplates() string {
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if t.common == nil {
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return ""
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@ -22,14 +22,14 @@ import (
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// return value evaluates to non-nil during execution, execution terminates and
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// Execute returns that error.
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//
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// Errors returned by Execute wrap the underlying error; call errors.As to
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// Errors returned by Execute wrap the underlying error; call [errors.As] to
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// unwrap them.
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//
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// When template execution invokes a function with an argument list, that list
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// must be assignable to the function's parameter types. Functions meant to
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// apply to arguments of arbitrary type can use parameters of type interface{} or
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// of type reflect.Value. Similarly, functions meant to return a result of arbitrary
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// type can return interface{} or reflect.Value.
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// of type [reflect.Value]. Similarly, functions meant to return a result of arbitrary
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// type can return interface{} or [reflect.Value].
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type FuncMap map[string]any
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// builtins returns the FuncMap.
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return t
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}
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// ParseFiles creates a new Template and parses the template definitions from
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// ParseFiles creates a new [Template] and parses the template definitions from
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// the named files. The returned template's name will have the base name and
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// parsed contents of the first file. There must be at least one file.
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// If an error occurs, parsing stops and the returned *Template is nil.
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@ -93,12 +93,12 @@ func parseFiles(t *Template, readFile func(string) (string, []byte, error), file
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return t, nil
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}
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// ParseGlob creates a new Template and parses the template definitions from
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// ParseGlob creates a new [Template] and parses the template definitions from
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// the files identified by the pattern. The files are matched according to the
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// semantics of filepath.Match, and the pattern must match at least one file.
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// The returned template will have the (base) name and (parsed) contents of the
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// first file matched by the pattern. ParseGlob is equivalent to calling
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// ParseFiles with the list of files matched by the pattern.
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// [ParseFiles] with the list of files matched by the pattern.
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//
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// When parsing multiple files with the same name in different directories,
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// the last one mentioned will be the one that results.
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@ -131,7 +131,7 @@ func parseGlob(t *Template, pattern string) (*Template, error) {
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return parseFiles(t, readFileOS, filenames...)
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}
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// ParseFS is like ParseFiles or ParseGlob but reads from the file system fsys
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// ParseFS is like [Template.ParseFiles] or [Template.ParseGlob] but reads from the file system fsys
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// instead of the host operating system's file system.
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// It accepts a list of glob patterns.
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// (Note that most file names serve as glob patterns matching only themselves.)
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@ -139,7 +139,7 @@ func ParseFS(fsys fs.FS, patterns ...string) (*Template, error) {
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return parseFS(nil, fsys, patterns)
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}
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// ParseFS is like ParseFiles or ParseGlob but reads from the file system fsys
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// ParseFS is like [Template.ParseFiles] or [Template.ParseGlob] but reads from the file system fsys
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// instead of the host operating system's file system.
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// It accepts a list of glob patterns.
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// (Note that most file names serve as glob patterns matching only themselves.)
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@ -346,12 +346,12 @@ type IdentifierNode struct {
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Ident string // The identifier's name.
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}
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// NewIdentifier returns a new IdentifierNode with the given identifier name.
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// NewIdentifier returns a new [IdentifierNode] with the given identifier name.
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func NewIdentifier(ident string) *IdentifierNode {
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return &IdentifierNode{NodeType: NodeIdentifier, Ident: ident}
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}
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// SetPos sets the position. NewIdentifier is a public method so we can't modify its signature.
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// SetPos sets the position. [NewIdentifier] is a public method so we can't modify its signature.
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// Chained for convenience.
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// TODO: fix one day?
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func (i *IdentifierNode) SetPos(pos Pos) *IdentifierNode {
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@ -359,7 +359,7 @@ func (i *IdentifierNode) SetPos(pos Pos) *IdentifierNode {
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return i
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}
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// SetTree sets the parent tree for the node. NewIdentifier is a public method so we can't modify its signature.
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// SetTree sets the parent tree for the node. [NewIdentifier] is a public method so we can't modify its signature.
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// Chained for convenience.
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// TODO: fix one day?
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func (i *IdentifierNode) SetTree(t *Tree) *IdentifierNode {
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SkipFuncCheck // do not check that functions are defined
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)
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// Copy returns a copy of the Tree. Any parsing state is discarded.
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// Copy returns a copy of the [Tree]. Any parsing state is discarded.
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func (t *Tree) Copy() *Tree {
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if t == nil {
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return nil
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@ -55,7 +55,7 @@ func (t *Tree) Copy() *Tree {
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}
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}
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// Parse returns a map from template name to parse.Tree, created by parsing the
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// Parse returns a map from template name to [Tree], created by parsing the
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// templates described in the argument string. The top-level template will be
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// given the specified name. If an error is encountered, parsing stops and an
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// empty map is returned with the error.
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@ -24,7 +24,7 @@ type common struct {
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}
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// Template is the representation of a parsed template. The *parse.Tree
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// field is exported only for use by html/template and should be treated
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// field is exported only for use by [html/template] and should be treated
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// as unexported by all other clients.
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type Template struct {
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name string
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@ -79,7 +79,7 @@ func (t *Template) init() {
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// Clone returns a duplicate of the template, including all associated
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// templates. The actual representation is not copied, but the name space of
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// associated templates is, so further calls to Parse in the copy will add
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// associated templates is, so further calls to [Template.Parse] in the copy will add
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// templates to the copy but not to the original. Clone can be used to prepare
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// common templates and use them with variant definitions for other templates
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// by adding the variants after the clone is made.
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@ -157,7 +157,7 @@ func (t *Template) Templates() []*Template {
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}
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// Delims sets the action delimiters to the specified strings, to be used in
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// subsequent calls to Parse, ParseFiles, or ParseGlob. Nested template
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// subsequent calls to [Template.Parse], [Template.ParseFiles], or [Template.ParseGlob]. Nested template
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// definitions will inherit the settings. An empty delimiter stands for the
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// corresponding default: {{ or }}.
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// The return value is the template, so calls can be chained.
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