AN3350 datasheet(147/185 Pages) STMICROELECTRONICS

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AN3350

Pragmas for diagnostic messages

Doc ID 018512 Rev 2

147/185

19.17

warn_illpragma

Controls the recognition of invalid pragma directives.

Syntax

#pragma warn_illpragma on | off | reset

Remarks

If you enable this pragma, the compiler displays a warning message when it encounters a

pragma it does not recognize.

By default, this setting is off.

19.18

warn_illtokenpasting

Controls whether or not to issue a warning message for improper preprocessor token

pasting.

Syntax

#pragma warn_illtokenpasting on | off | reset

Remarks

An example of this is shown below:

#define PTR(x) x##* / PTR(y)

Token pasting is used to create a single token. In this example, y and x cannot be

combined. Often the warning message indicates the macros uses “##” unnecessarily.

This pragma does not correspond to any panel setting. By default, this pragma is on.

19.19

warn_illunionmembers

Controls whether or not to issue a warning message for invalid union members, such as

unions with reference or non-trivial class members.

Syntax

#pragma warn_illunionmembers on | off | reset

Remarks

This pragma does not correspond to any panel setting. By default, this pragma is on.

19.20

warn_impl_f2i_conv

Controls the issuing of warning messages for implicit float-to-int conversions.

Syntax

#pragma warn_impl_f2i_conv on | off | reset

AN3350 Datasheet(PDF) 147 Page - STMicroelectronics