AN3350 datasheet(137/185 Pages) STMICROELECTRONICS

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AN3350

Pragmas for language translation

Doc ID 018512 Rev 2

137/185

Tells the compiler that the current and all subsequent files use the same text encoding. By

default, text encoding is effective only to the end of the file.

Remarks

By default, #pragma text_encoding is only effective through the end of file. To affect the

default text encoding assumed for the current and all subsequent files, supply the “global”

modifier.

By default, this setting is ASCII.

18.12

trigraphs

Controls the use trigraph sequences specified in the ISO standards.

Syntax

#pragma trigraphs on | off | reset

Remarks

If you are writing code that must strictly adhere to the ANSI standard, enable this pragma.

Note:

Use of this pragma may cause a portability problem for some targets.

Be careful when initializing strings or multi-character constants that contain question marks.

Example 83 Example of pragma trigraphs

char c = '????'; /* ERROR: Trigraph sequence expands to '??^ */

char d = '\?\?\?\?'; /* OK */

By default, this pragma is disabled.

18.13

unsigned_char

Controls whether or not declarations of type char are treated as unsigned char.

Table 27.

Trigraph table

Trigraph

Character

??=

??/

??(

[

??)

]

??!

??<

{

??>

}

??-

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