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pragma
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NAME
pragma
DESCRIPTION
The preprocessor directive #pragma can be used to select
several compilation options.
combine_strings: Perform the addition of string literals at
compile time instead of run time, e.g. "foo"+"bar"
will be compiled as "foobar". Like the concatenation
of adjacent string literals ("foo" "bar" is compiled
as "foobar" as well) already done by the preprocessor,
the combine_strings will save memory, because the combined
strings can be shared betweena blueprint and it's clones,
and the strings also have a good chance to be entered
into the global shared-string-table.
no_combine_string: Contrary to combine_strings, may be used to
deactivate a combine_strings pragma.
no_clone: The blueprint object can't be cloned.
no_inherit: The program can't be inherited.
no_shadow: The program can't be shadowed (similar to declaring
all functions as 'nomask').
weak_types: no type checking (this is the default).
strict_types: all functions must be declared with argument
prototypes, and the return values of call_other() must
be casted.
strong_types: all functions must be declared with complete
types of returnvalue and parameters.
save_types: the declaration data is kept after compilation and
checked at runtime. This is important for type-safe
inheritance.
verbose_errors: upon a compilation error, the driver displays
the actual context of the errorenous text. This is
helpful with errors within long expressions.
no_local_scopes, local_scopes: when local scoping is turned
off, local variables are visible even outside
their defining blocks. The setting of this pragma is
considered upon entry into a function only. By default,
local scoping is on.
local_scopes: local variables are visible only inside their
defining blocks.
pedantic: Certain warnings are treated as errors:
- failure to pass enough arguments to simul efuns
sloppy: Turns off pedantic (the default).
When an object is compiled with type testing (#pragma
strict_types), all types are saved of the arguments for that
function during compilation. If the #pragma save_types is
specified, then the types are saved even after compilation, to
be used when the object is inherited.
The following two pragmas are available if the driver was
compiled with DEBUG and TRACE_CODE options:
set_code_window: Sets an offset to the current program writing
position. Use this BEFORE a piece of code where you
want to check to what bytecodes it is compiled.
show_code_window: shows some bytes starting at or near the
last point set_code_window was called.
HISTORY
LDMud 3.2.7 added local_scopes, no_local_scopes, no_clone
and no_inherit.
LDMud 3.2.8 added weak_types, pedantic and sloppy.
SEE ALSO
inheritance(LPC), initialisation(LPC), objects(C),
operators(LPC)