diff options
| -rw-r--r-- | txr.1 | 20 |
1 files changed, 12 insertions, 8 deletions
@@ -26456,16 +26456,20 @@ namespace established by .desc A .code defsymacro -form introduces a symbol macro: a symbol macro is a parameterless -substitution keyed to a symbol. In contexts where a symbol macro -definition of +form introduces a symbol macro. A symbol macro consists of a binding +between a symbol +.meta sym +and and a +.metn form . +The binding denotes the form itself, rather than its value. How the +symbol macro works is that if .meta sym -is visible, if the form +occurs as a form in a scope where the symbol macro definition is +in scope, .meta sym -appears such that its evaluation is called for, it is subject -to replacement by +is replaced by .metn form . -After replacement takes place, +Immediately after this replacement takes place, .meta form itself is then processed for further replacement of macros and symbol macros. @@ -26497,7 +26501,7 @@ then first removes that variable from the global environment, and if that variable is special, the symbol's special marking is removed. .code defsymacro -doesn't alter a dynamic binding of a special variable. Any such +doesn't alter the dynamic binding of a special variable. Any such a binding remains intact. If .code defsymacro |