Texas Instruments TI-89 - Error Directive; Pragma Directive; Trigraph Sequences

100
Section 2: Compiler
TI
-
89 / TI
-
92 Plus Sierra C Assembler Reference Manual
Not for Distribution
Beta Version February 2, 2001
2.16.7. Error Directive
A preprocessing directive of the following form causes the compiler to produce
an error message that includes the macro expansion of the specified sequence
of preprocessing tokens:
#error preprocessing_tokens
For example, the following sequence causes generation of the error message
shown below if SIZE is greater than 1024:
#if SIZE > 1024
#line 150 "test.c"
#error SIZE is greater than 1024!
#endif
test.c, 150: SIZE is greater than 1024!
2.16.8. Pragma Directive
A preprocessing directive of the following form is a pragma:
#pragma preprocessing_tokens
A pragma causes the compiler to behave in specified ways. The functionality of a
#pragma
directive is similar to that of a command line flag, except that the
specified behavior can be embedded in the source file and turned on and off
multiple times during a single compilation. If the directive following the
#pragma
is not recognized, the pragma directive is ignored. Refer to section
2.4 Pragma
Directives
, for a description of the pragmas supported by Sierra C.
2.16.9. Trigraph Sequences
A trigraph sequence is a sequence of three characters (??
x
) that maps into a
single character. They are used to facilitate the writing of C programs on
terminals that do not support all the characters required by the C language. The
trigraph conversion capabilities are enabled by specifying the
-T
flag on the
compiler command line. The supported trigraph sequences are as follows:
??=
⇒
#
??(
⇒
[
??/
⇒
\
??)
⇒
]
??'
⇒
^
??<
⇒
{
??!
⇒
|
??>
⇒
}
??-
⇒
~