warn_implicitconv. NXP CodeWarrior Development Studio

warn_implicitconv

If you enable this pragma, the compiler issues a warning message for implicitly converting either from signed int

to unsigned int

or vice versa. Listing 31-14 on page 480

provides an example.

Listing 31-14. Example of implicit conversions between signed int

and unsigned int

#pragma warn_impl_s2u_conv on signed int si; unsigned int ui; int main()

{

ui = si; /* WARNING */

si = ui; /* WARNING */

#pragma warn_impl_s2u_conv off

ui = si; /* OK */

si = ui; /* OK */

}

By default, this pragma is enabled.

31.23 warn_implicitconv

Controls the issuing of warning messages for all implicit arithmetic conversions.

Syntax

#pragma warn_implicitconv on | off | reset

Remarks

If you enable this pragma, the compiler issues a warning message for all implicit arithmetic conversions when the destination type might not represent the source value.

Listing 31-15 on page 480 provides an example.

Listing 31-15. Example of Implicit Conversion

#pragma warn_implicitconv on float f; signed int si; unsigned int ui; int main()

{

f = si; /* WARNING */

si = f; /* WARNING */

ui = si; /* WARNING */

si = ui; /* WARNING */

}

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

10.6, 02/2014

480 Freescale Semiconductor, Inc.