When the ARM Conformance option in the C/C++ Language Panel is on, CodeWarrior C++ generates an error when it encounters certain ANSI/ISO C++ features that conflict with the C++ specification in The Annotated C++ Reference Manual. Use this option only if you must make sure that your code strictly follows the specification in The Annotated C++ Reference Manual.

Turning on this option prevents you from doing the following

• Using protected base classes (ARM, §11.2). For example:

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class X {};
class Y : protected X {}; // OK in CodeWarrior C++. Error in ARM.

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• Changing the syntax of the conditional operator to let you use assignment expressions without parentheses in the second and third expressions (K&R, §A7.16). For example:

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i ? x=y : y=z   // OK in CodeWarrior C++. Error in ARM.
i ? (x=y):(y=z) // OK in ARM and CodeWarrior C++

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• Declaring variables in the conditions of if, while and switch statements (K&R, §A9.4, §A9.5). For example:

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while (int i=x+y) { /* ... */ }
       // OK in CodeWarrior C++. Error in ARM.

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for(int i=1; i<1000; i++) { /* ... */ }
return i;  // OK in ARM, Error in CodeWarrior C++

This option corresponds to the pragma ARM_conform. To check whether this option is on, use __option (ARM_conform). By default, this option is off.

See also "ARM_conform" and "Checking Options."