AN3350 datasheet(139/185 Pages) STMICROELECTRONICS

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AN3350

Pragmas for diagnostic messages

Doc ID 018512 Rev 2

139/185

Pragmas for diagnostic messages

19.1

extended_errorcheck

Controls the issuing of warning messages for possible unintended logical errors.

Syntax

#pragma extended_errorcheck on | off | reset

Remarks

If you enable this pragma, the compiler generates a warning message (not an error) if it

encounters some common programming errors:

●

An integer or floating-point value assigned to an enum type. Example 84 shows an

example.

Example 84 Assigning to an enumerated type

enum Day { Sunday, Monday, Tuesday, Wednesday,

Thursday, Friday, Saturday } d;

d = 5; /* WARNING */

d = Monday; /* OK */

d = (Day)3; /* OK */

●

An empty return statement in a function that is not declared void. For example,

Example 85 results in a warning message.

Example 85 A non-void function with an empty return statement

int MyInit(void)

{

int err = GetMyResources();

if (err != -1)

{

err = GetMoreResources();

}

return; /* WARNING: empty return statement */

}

Example 86 shows how to prevent this warning message.

Example 86 A non-void function with a proper return statement

int MyInit(void)

{

int err = GetMyResources();

if (err != -1)

{

err = GetMoreResources();

}

return err; /* OK */

}

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