Provides a low-level interface to the text/tabwriter package.
Package tabwriter implements a write filter (tabwriter.Writer) that
translates tabbed columns in input into properly aligned text.
The package is using the Elastic Tabstops algorithm described at
The text/tabwriter package is frozen and is not accepting new features.
ConstantsConstants are variables with :const true in their metadata. Joker currently does not recognize them as special; as such, it allows redefining them or their values.
Force right-alignment of cell content.
Default is left-alignment.
Print a vertical bar ('|') between columns (after formatting).
Discarded columns appear as zero-width columns ("||").
Handle empty columns as if they were not present in
the input in the first place.
To escape a text segment, bracket it with Escape characters.
For instance, the tab in this string "Ignore this tab: \xff\t\xff"
does not terminate a cell and constitutes a single character of
width one for formatting purposes.
The value 0xff was chosen because it cannot appear in a valid UTF-8 sequence.
Ignore html tags and treat entities (starting with '&'
and ending in ';') as single characters (width = 1).
Strip Escape characters bracketing escaped text segments
instead of passing them through unchanged with the text.
Always use tabs for indentation columns (i.e., padding of
leading empty cells on the left) independent of padchar.
Functions, Macros, and Special Forms
(NewWriter output minwidth tabwidth padding padchar flags)
NewWriter allocates and initializes a new tabwriter.Writer.
The parameters are the same as for the Init function.
Go input arguments: (output io.Writer, minwidth int, tabwidth int, padding int, padchar byte, flags uint)
Go return type: *Writer
Joker input arguments: [^go.std.io/Writer output, ^Int minwidth, ^Int tabwidth, ^Int padding, ^Int padchar, ^Number flags]
Joker return type: (ref-to go.std.text.tabwriter/Writer)
*WriterConcrete GoType v1.0
FlushReceiver for *Writer v1.0
Flush should be called after the last call to Write to ensure
that any data buffered in the Writer is written to output. Any
incomplete escape sequence at the end is considered
complete for formatting purposes.
WriterConcrete GoType v1.0
A Writer is a filter that inserts padding around tab-delimited
columns in its input to align them in the output.
The Writer treats incoming bytes as UTF-8-encoded text consisting
of cells terminated by horizontal ('\t') or vertical ('\v') tabs,
and newline ('\n') or formfeed ('\f') characters; both newline and
formfeed act as line breaks.
Tab-terminated cells in contiguous lines constitute a column. The
Writer inserts padding as needed to make all cells in a column have
the same width, effectively aligning the columns. It assumes that
all characters have the same width, except for tabs for which a
tabwidth must be specified. Column cells must be tab-terminated, not
tab-separated: non-tab terminated trailing text at the end of a line
forms a cell but that cell is not part of an aligned column.
For instance, in this example (where | stands for a horizontal tab):
aa |b |dd
the b and c are in distinct columns (the b column is not contiguous
all the way). The d and e are not in a column at all (there's no
terminating tab, nor would the column be contiguous).
The Writer assumes that all Unicode code points have the same width;
this may not be true in some fonts or if the string contains combining
If DiscardEmptyColumns is set, empty columns that are terminated
entirely by vertical (or "soft") tabs are discarded. Columns
terminated by horizontal (or "hard") tabs are not affected by
If a Writer is configured to filter HTML, HTML tags and entities
are passed through. The widths of tags and entities are
assumed to be zero (tags) and one (entities) for formatting purposes.
A segment of text may be escaped by bracketing it with Escape
characters. The tabwriter passes escaped text segments through
unchanged. In particular, it does not interpret any tabs or line
breaks within the segment. If the StripEscape flag is set, the
Escape characters are stripped from the output; otherwise they
are passed through as well. For the purpose of formatting, the
width of the escaped text is always computed excluding the Escape
The formfeed character acts like a newline but it also terminates
all columns in the current line (effectively calling Flush). Tab-
terminated cells in the next line start new columns. Unless found
inside an HTML tag or inside an escaped text segment, formfeed
characters appear as newlines in the output.
The Writer must buffer input internally, because proper spacing
of one line may depend on the cells in future lines. Clients must
call Flush when done calling Write.