NAME pragma DESCRIPTION The preprocessor directive #pragma can be used to select several compilation options. Multiple options can be selected in one #pragma directive by separating them with commas. 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 between a 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'). init_variables: Clone variables are initialized by __INIT(). share_variables: Clone variables are initialized from the blueprint. 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). range_check: Use of questionable ranges (ranges of negative sizes, or with bounds beyond the array's size) cause a runtime warning. no_range_check: Turns off range_check (the default). warn_deprecated: Use of deprecated efuns or indexing operations causes the compiler to issue a warning. no_warn_deprecated: Turns off warn_deprecated (the default). warn_empty_casts: A cast of a value to its own type generates a warning (the default). Exception are casts to type 'mixed'. no_warn_empty_casts: Turns off warn_empty_casts. warn_missing_return: Warn if a value-returning function is missing a return statement (the default). If possible, the driver will try to detect this at compile time; otherwise a runtime warning will be generated when the function is executed. The check applies only to functions with a declared return type other than 'void'. no_warn_missing_return: Turn off warn_missing_return. warn_function_inconsistent: If an inherited function is overloaded with inconsistent return types or arguments, a warning is generated; or if pragma_pedantic is in effect, an error. By default this is active. no_warn_function_inconsistent: An inherited function can be overloaded with inconsistent return types or arguments, as long as pragma_pedantic is not in effect. This pragma is meant to easen the adaption of legacy mudlib code - in general one should fix the warnings, not turn them off. 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. EXAMPLES #pragma strict_types #pragma no_clone, no_inherit 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. LDMud 3.2.9 allowed to specify multiple pragmas in one directive. LDMud 3.2.9 added (no_)warn_deprecated. LDMud 3.2.10 added (no_)warn_empty_casts. Starting with LDMud 3.2.10, #pragma xxx_types in an included file are no longer valid only until the end of the file, but remain active when processing returns to the including file. LDMud 3.2.11 added (no_)warn_function_inconsistent. LDMud 3.3.378 added init_variables, share_variables. LDMud 3.3.357 added (no_)warn_missing_return. LDMud 3.3.646 added (no_)range_check. SEE ALSO inheritance(LPC), initialisation(LPC), objects(C), operators(LPC)