Difference between revisions of "Metacommand"

From QB64 Wiki
Jump to navigation Jump to search
imported>Clippy
m
imported>Clippy
m
Line 11: Line 11:
 
::REM {{KW|$STATIC}} 'arrays cannot be resized once dimensioned
 
::REM {{KW|$STATIC}} 'arrays cannot be resized once dimensioned
  
::{{KW|$CHECKING}}: OFF 'disables QB64 C++ event checking
+
::{{KW|$CHECKING}}:OFF 'disables QB64 C++ event checking (no space before OFF)
  
  

Revision as of 03:58, 18 October 2010

Qbasic Metacommands are commands that are commented out and start with $.


Syntax:

REM $INCLUDE: 'QB.BI' 'loads a reference file or library
REM $DYNAMIC 'enables resizing of array dimensions with REDIM
REM $STATIC 'arrays cannot be resized once dimensioned
$CHECKING:OFF 'disables QB64 C++ event checking (no space before OFF)


  • $CHECKING: OFF should only be used with errorless code where every CPU cycle counts! Use ON to re-enable event checking.
  • QB64 event $CHECKING is NOT commented out!
  • Qbasic Metacommands are normally used at the program start and are in effect throughout the program.
  • $INCLUDE can be used at the beginning or at the end of program SUB procedures. Placing the reference elsewhere creates a QB64 compiler error!
  • $STATIC makes all arrays STATIC or unchangeable in size. Use DIM only!
  • $DYNAMIC allows larger arrays that are changeable in size. Use REDIM for changeable sizes! _PRESERVE preserves contents.
  • Metacommands should have their own program line since they are commented out.


See also:

REM

DIM, REDIM

ON TIMER (n)




Navigation:
Go to Keyword Reference - Alphabetical
Go to Keyword Reference - By usage
Go to Main WIKI Page