warn_ptr_int_conv. NXP CodeWarrior Development Studio

warn_ptr_int_conv

• An equal comparison in a statement that contains a single expression. This check is useful if you use

==

when you meant to use

=

. The listing below shows an example.

Listing 31-19. Confusing = and == Operators in Assignments

a == 0; // WARNING: This is a comparison.

a = 0; // OK: This is an assignment, no warning

• A semicolon (

;

) directly after a while

, if

, or for

statement.

For example, the listing below, generates a warning message.

Listing 31-20. Empty statement

i = sockcount(); while (--i); /* WARNING: empty loop. */

matchsock(i);

If you intended to create an infinite loop, put white space or a comment between the while statement and the semicolon. The statements in the listing below, suppress the above error or warning messages.

Listing 31-21. Intentional empty statements

while (i++) ; /* OK: White space separation. */ while (i++) /* OK: Comment separation */ ;

By default, this pragma is off

.

31.30 warn_ptr_int_conv

Controls the recognition the conversion of pointer values to incorrectly-sized integral values.

Syntax

#pragma warn_ptr_int_conv on | off | reset

Remarks

If you enable this pragma, the compiler issues a warning message if an expression attempts to convert a pointer value to an integral type that is not large enough to hold the pointer value.

Listing 31-22. Example for #pragma warn_ptr_int_conv

#pragma warn_ptr_int_conv on char *my_ptr; char too_small = (char)my_ptr; /* WARNING: char is too small. */

CodeWarrior Development Studio for Power Architecture Processors Build Tools Reference Manual, Rev.

10.6, 02/2014

484 Freescale Semiconductor, Inc.