Commit fc37ae72 authored by Richard M. Stallman's avatar Richard M. Stallman
Browse files

(Compiler Errors): Clarify previous change.

parent d9e43b70
......@@ -505,12 +505,14 @@ The call to @var{func} must be in the @var{then-form} of the
@code{if}, and @var{func} must appear quoted in the call to
@code{fboundp}. (This feature operates for @code{cond} as well.)
You can tell the compiler that a function is defined using a
@code{declare-function} statement (@pxref{Declaring Functions}).
You can tell the compiler that a function is defined using
@code{declare-function} (@pxref{Declaring Functions}). Likewise, you
can tell the compiler that a variable is defined using @code{defvar}
with no initial value.
Likewise, you can suppress a compiler warning for an unbound variable
@var{variable} by conditionalizing its use on a @code{boundp} test,
like this:
You can suppress the compiler warning for a specific use of an
undefined variable @var{variable} by conditionalizing its use on a
@code{boundp} test, like this:
@example
(if (boundp '@var{variable}) ...@var{variable}...)
......@@ -521,11 +523,8 @@ The reference to @var{variable} must be in the @var{then-form} of the
@code{if}, and @var{variable} must appear quoted in the call to
@code{boundp}.
You can tell the compiler that a variable is defined using a
@code{defvar} statement with no initial value.
You can suppress any compiler warnings using the construct
@code{with-no-warnings}:
You can suppress any and all compiler warnings within a certain
expression using the construct @code{with-no-warnings}:
@c This is implemented with a defun, but conceptually it is
@c a special form.
......@@ -536,10 +535,11 @@ but the compiler does not issue warnings for anything that occurs
inside @var{body}.
We recommend that you use this construct around the smallest
possible piece of code.
possible piece of code, to avoid missing possible warnings other than one
one you intend to suppress.
@end defspec
More precise control of warnings is possible by setting the variable
More precise control of warnings is possible by setting the variable
@code{byte-compile-warnings}.
@node Byte-Code Objects
......
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