diff options
| -rw-r--r-- | txr.1 | 30 |
1 files changed, 14 insertions, 16 deletions
@@ -9516,22 +9516,18 @@ are embedded in directives using .code @ also. -Secondly, the -.code @(do) -directive can be used for evaluating one or more Lisp -forms, such that their value is thrown away. This is useful for evaluating some -Lisp code for the sake of its side effect, such as defining a variable, -updating a hash table, et cetera. - -Thirdly, the -.code @(require) -directive can be used to evaluate Lisp expressions -as part of the matching logic of the \*(TX pattern language. The return value -of the rightmost expression is examined. If it is nil, then the -.code @(require) -directive triggers a match failure. Otherwise, matching proceeds. +Secondly, certain directives evaluate Lisp expressions without +requiring +.codn @ . +These are +.codn @(do) , +.codn @(require) , +.codn @(assert) , +.code @(if) +and +.codn @(next) . -Fourth, \*(TL code can be placed into files. On the command +Thirdly, \*(TL code can be placed into files. On the command line, \*(TX treats files with a .str ".tl" suffix as \*(TL code, and the @@ -9558,7 +9554,9 @@ to the integer 4: Bind variable .code b -to the standard input stream: +to the standard input stream. Note that +.code @ +is not required on a Lisp variable: .cblk @(bind a *stdin*) |