Preprocessor

[rbrich]

Doesn't need to be really a separate preprocessor, can be part of parser. A "preprocess-only" option will emit source code with conditionals and includes applied, #syntax can be either kept untouched or removed.

To avoid emitting special markers for compiler (real/logical line numbers etc.), the directives can be consumed directly by compiler, inclusion will create new file context but keep same AST, conditional will skip part of source, etc.

• #syntax fire 1.0 (<lang> <major>[.<minor>]) - optional declaration of language version, checked by compiler ( part only informative, <lang> <major> must be known to the compiler, otherwise it emits error or warning)
• #include
• #if

New idea: still textual preprocessor, but the language will be the xci-script, i.e. you can define compile-time function that can be called to generate code.