diff options
Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 17 |
1 files changed, 17 insertions, 0 deletions
@@ -3334,6 +3334,8 @@ for the output clause. The syntax for this is @(NAME :filter <filterspec>}. The filter specification syntax is the same as in the output clause. See Output Filtering below. +.SS Output Variables: Indexing + Additional syntax is supported in output variables that is does not appear in pattern matching variables. @@ -3367,6 +3369,21 @@ The above produces the text "b,c" in a field 10 spaces wide. The [1..3] argument extracts a range of a; the "," argument specifies an alternate separator string, and 10 specifies the field width. +.SS Output Substitutions + +The brace syntax has another syntactic and semantic extension. In place +of the symbol, an expression may appear. The value of that expression +is substituted. + +Example: + + @(bind a "foo") + @(output) + @{`@a:` -10} + +Here, the quasiliteral expression `@a:` is evaluated, producing the string +"foo:". This string is printed right-adjusted in a 10 character field. + .SS The Repeat Directive The repeat directive is generates repeated text from a ``boilerplate'', |