diff options
Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 49 |
1 files changed, 24 insertions, 25 deletions
@@ -3395,25 +3395,6 @@ variable, which is visible to the remainder of the entire query. The variable bindings survive beyond the clause, but the data stream does not. -The -.code @(next) -directive supports the file name conventions as the command -line. The name -.code - -means standard input. Text which starts with a -.code ! -is -interpreted as a shell command whose output is read like a file. These -interpretations are applied after variable substitution. If the file is -specified as -.codn @a , -but the variable a expands to -.strn "!echo foo" , -then the output of -the -.str "echo foo" -command will be processed. - .dir skip The @@ -7366,12 +7347,7 @@ the keyword list. If the destination is missing, then the entire argument list is a keyword list. The destination may be a string which gives the path name of -a file to open for output. If the name is -.code - -it instead denotes standard output, and if it begins with -.code ! -then the rest of the shell is treated as a shell command -to which the output is piped. The destination string may be specified as a +a file to open for output. The destination string may be specified as a variable which holds text, as a string literal or as a quasiliteral Alternatively, the destination may be a stream object. @@ -42969,6 +42945,29 @@ of these version values, the described behaviors are provided if is given an argument which is equal or lower. For instance .code "-C 103" selects the behaviors described below for version 105, but not those for 102. +.IP 142 +Until version 142, the \*(TX pattern language supported a prefix +convention on data sources. Data sources beginning with the character +.code ! +were treated as system command pipes, and data sources beginning with +.code $ +indicated that a directory is to be scanned. This convention was recognized +both for command line arguments, the arguments of the +.code @(next) +directive, and of the +.code @(output) +directive, whether or not the argument was a literal or a computed +value. This feature was dropped from the language after version 142. +Also, until version 142, the +.code @(next) +directive recognized the name +.str - +as denoting standard input, and +.code @(output) +recognized it as standard output. These behaviors were also removed; +versions after 142 recognize this convention only when it appears +as a command line argument. All these old behaviors are provided +if compatibility with 142 or earlier is requested. .IP 139 After \*(TX 139, changes were implemented in the area of pseudo-random number generation. Compatibility with 139 brings back the previous |