Add support for all primitive types via NSValue

[alexgarbarev]

I mean adding support for all structures and types, using method value:withObjCType of NSValue.

For example:

PrimitiveStruct structure;
structure.fieldA = 23;
structure.fieldB = 32.1234;

NSValue *value = [NSValue value:&structure withObjCType:@encode(PrimitiveManStruct)];

Plan to implement:

• Add length calculation to TyphoonTypeDescriptor (Use NSGetSizeAndAlignment function for that)
• Refactor category NSValue+TCFInstanceBuilder to make it universal for all types

void *buffer = malloc(length);
[value getValue:buffer];
[invocation setArgument:buffer atIndex:_index];
free(buffer);

• Replace KVC property injection by own implementation via NSInvocation
• Try to catch custom setter and getter method names from runtime for properties (not just set)

[drodriguez]

Replace KVC property injection by own implementation via NSInvocation

What’s the reason behind this intended change?

[alexgarbarev]

KVC can't handle NSValue with non-nsvalue structs, pointers, c-strings, unions, selectors etc. I.e. KVC can't handle NSValue created by [NSValue value:&structure withObjCType:@encode(PrimitiveManStruct)]; method with custom types.
It crashes :-(

[drodriguez]

Ok. Understood.

[alexgarbarev]

Seems, like all works great. Now we can inject all primitive types in typhoon!
Unknown structs, unions, c-arrays and other via NSValue wrapper.
To do it - just init NSValue by value:withObjCType: method. Or use my macros:

#define NSValueFromPrimitive(primitive) ([NSValue value:&primitive withObjCType:@encode(typeof(primitive))])

Macros usage example:

//char *
char *string = "Hello world";
[definition injectProperty:@selector(cString) with:NSValueFromPrimitive(string)];

//Selector
[initializer injectParameterWith:NSValueFromPrimitive(@selector(selectorValue))];

//Structure
PrimitiveManStruct structure;
structure.fieldA = 23;
structure.fieldB = LONG_MAX;
[initializer injectParameterWith:NSValueFromPrimitive(structure)];

[jasperblues]

Leaving this open so that I remember to update the documentation in the Typhoon 2.0 release.