- The binary form of ZCC_OpInfoType::FindBestProto() needs special
handling for conversion from single to double precision floating point
so that it doesn't choose an integer form over a floating point form
when picking the best prototype.
- This information is already stored in the node's NodeType field, so
there's no reason to go do a table lookup for it elsewhere. Must have
been a brain fart when I wrote them in the first place.
- Added ZCCCompiler class as a place to generate IR and symbols from an
AST. Right now, all it does is simplify constant expressions into
constant values.
- Do type promotion on the AST where appropriate.
- Added true and false tokens to the parser driver.
