diff options
Diffstat (limited to 'lispref/control.texi')
| -rw-r--r-- | lispref/control.texi | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/lispref/control.texi b/lispref/control.texi index 1fbb668da0f..a824e79f6f2 100644 --- a/lispref/control.texi +++ b/lispref/control.texi @@ -172,8 +172,8 @@ never evaluated---it is ignored. Thus, in the example below, @end example @end defspec -@tindex when @defmac when condition then-forms@dots{} +@tindex when This is a variant of @code{if} where there are no @var{else-forms}, and possibly several @var{then-forms}. In particular, @@ -189,8 +189,8 @@ is entirely equivalent to @end example @end defmac -@tindex condition @defmac unless condition forms@dots{} +@tindex condition This is a variant of @code{if} where there is no @var{then-form}: @example @@ -550,10 +550,10 @@ have several ways of transferring control nonsequentially: @code{return}, @defspec catch tag body@dots{} @cindex tag on run time stack -@code{catch} establishes a return point for the @code{throw} function. The -return point is distinguished from other such return points by @var{tag}, -which may be any Lisp object. The argument @var{tag} is evaluated normally -before the return point is established. +@code{catch} establishes a return point for the @code{throw} function. +The return point is distinguished from other such return points by +@var{tag}, which may be any Lisp object except @code{nil}. The argument +@var{tag} is evaluated normally before the return point is established. With the return point in effect, @code{catch} evaluates the forms of the @var{body} in textual order. If the forms execute normally, without |