- Method
apply_attribute_constant
type(mixed) apply_attribute_constant(string attr, mixed value, type(mixed) arg_type, void cont_type)
- Description
Handle constant arguments to attributed function argument types.
- Parameter attr
Attribute that arg_type had.
- Parameter value
Constant value sent as parameter.
- Parameter arg_type
Declared type of the function argument.
- Parameter cont_type
Continuation function type after the current argument.
This function is called when a function is called
with the constant value value and it has been
successfully matched against arg_type ,
and arg_type had the type attribute attr .
This function is typically used to perform specialized
argument checking and to allow for a strengthening
of the function type based on value .
The default implementation implements the "sprintf_format"
,
"sscanf_format"
and "sscanf_76_format"
attributes.
- Returns
Returns a continuation type if it succeeded in strengthening the type.
Returns UNDEFINED otherwise (this is not an error indication).
- See also
pop_type_attribute() , push_type_attribute()