HP 3000 Manuals

HP Pascal/iX Reference Manual

STANDARD_LEVEL 

STANDARD_LEVEL is an HP Standard Option.

The STANDARD_LEVEL compiler option specifies the level of syntax that the
compiler routinely processes.  The compiler issues a warning if it
encounters a language feature that is illegal at that level.  The
compiler compiles the illegal feature if possible; otherwise, it is a
syntax error.

Syntax 

                 {ANSI      }
                 {ISO       }
$STANDARD_LEVEL '{HP_PASCAL }'$
                 {HP_MODCAL }
                 {EXT_MODCAL}
Parameters 

ANSI          Allows only ANSI Pascal.

ISO           Allows only ISO Pascal (and ANSI Pascal).

HP_PASCAL     Allows only HP Pascal (and ISO Pascal).

HP_MODCAL     Allows HP Pascal and some system programming extensions.

EXT_MODCAL    Allows HP Pascal and all system programming extensions.

Default       HP_PASCAL.

Location      Anywhere.

The HP Standard specifies the STANDARD_LEVEL compiler option only with
the standard levels ANSI, ISO, and HP_PASCAL. HP Pascal accepts the
additional standard levels HP_MODCAL and EXT_MODCAL.

A standard level violation (use of a language feature that is not
available at the current standard level) causes the compiler to issue a
warning, except if the violation involves a reserved word, in which case
it is an error.


NOTE  The STANDARD_LEVEL compiler option also accepts the Pascal/V
      standard levels 'HP' and 'HP3000', which it treats like
      'HP_PASCAL'.


Example 

     $STANDARD_LEVEL 'ANSI'$  {equivalent to $ANSI ON$}
     $OS 'MPE'$
     PROGRAM show_level (output);
     PROCEDURE proc1;
     VAR
        i : integer;
        b : Boolean;
     BEGIN
        assert(b,i);
          ^
     **** WARNING #1  THIS FEATURE REQUIRES $STANDARD_LEVEL 'HP_PASCAL'$ (539)
       i := 0;
       b := true;
     END;

     BEGIN
     END.

Figure 12-4  illustrates the relationship between the STANDARD_LEVEL
parameters.


          Figure 12-4.  Relationships Between STANDARD_LEVEL Compiler Option Parameters 

MPE/iX 5.0 Documentation