Better programming language
I use Ruby everyday. I like C and Java for performance, but dislike their lack of expressiveness and build/configuration issues. I like Io’s garbage collector, coroutines and local state, but dislike its awful performance which cannot be optimized by design.
I generally hate Perl, but the idea of extensible grammar is interesting (remember E4X: why not to have an API to the parser to embed other grammars?).
In Ruby i’d like to extend core classes, but i don’t like to pollute other libraries with my helper methods. Thus, i need to narrow scope of some selectors to the lexical context.
I want pthreads, but with no implicit resource sharing: every thread must see only those resources, which are exposed for it explicitly. Communication between threads must be done through the efficient queues/pipes.
I want to compile arbitrary part of source code in runtime with arbitrary explicitly defined context. I want to have both portable bytecode and machine-dependent code and both serializable. Source code and runtime state must be serializable too.
At the core of the language, I want to have an extensible parser/interpreter, FFI and a compiler API.
The language should suit well for object-oriented programming, but should not be purely object-oriented.