Add highlighting for more keywords

[petereichinger]

• #if
• #define
• uniform
• POSITION

Also additional Unity specific variables

• UNITY_MATRIX_MVP

[petereichinger]

@mysteryDate could you show me examples for the other highlighting and how you want it done?

[mysteryDate]

C-like languages usually have special highlighting for strings:

...and for inline functions, as well as function calls:

The above are just a unity shader with C++ syntax selected.

Here's an example of what CG highlighting does, as it knows all possible variable types (of which there are not that many, obviously there's half, fixed, half4, etc.):

..and finally highlighting for CG built in functions:

I should definitely pull the source and put some work into this myself. I'm just at work at the moment.

[petereichinger]

String highlighting is already working with the newest version.

Looking at the other stuff atm.