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Diffstat (limited to 'cm/ex03.cm')
| -rw-r--r-- | cm/ex03.cm | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/cm/ex03.cm b/cm/ex03.cm new file mode 100644 index 0000000..34275df --- /dev/null +++ b/cm/ex03.cm @@ -0,0 +1,38 @@ +// Hypothetical, fully ledged version of Cm, at compile time, using a superset of the runtime language +// with macros, and an escape hatch into native code (C or whatever) + +// Language structurally, a bit like Nim: +// - the scripting language itself +// - macros, which are functions from language itself operating on special AST values at compile time +// - (NEW) native escape hatch, kind of literate programming style, expanding into native program source code at compile time + +// So the compile procedure is as follows: +// - build interpreter (native source code) from source +// - init interpreter +// - load program source code, evaluate to produce +// - an environment image (bytecode of scripting constructs), and +// - native program source (text of things produced by native escape hatch, plus interpreter source code itself, plus auto generated bindings) +// - build native program +// And run procedure is: +// - init interpreter (<- the PE/mach-o/ELF entrypoint here) +// - init native program parts (<- i.e. the escape hatches don't generate an actual main() func, instead a customly named init() func that gets called by the generated machinery) +// - load bindings +// - load environment image +// - run native program entrypoint +// The order of native program entrypoint vs. environment loading might be reversed. Depending on how it makes sense. +// Or maybe there will be 2 parts, the native program *init* and *start*. Former would be like the _mainCRTStartup() that initializes global variables, etc. + +// REQUIREMENT FOR NATIVE PROGRAM SOURCE: +// Must be nicely readable. +// We plan on completely reusing the traditional native program debuggers, e.g. GDB for debugging +// The interpreter can then have its own debugging system +// Problem: How to do mixed language debugging? like stepping into a native function, this is a lot of work/hacks to wrap on top of e.g. GDB +// SIDE THOUGHT: +// should bindings be baked into the environment image (i.e. design the bytecode format to include this? however it should be done; can't really imagine it now?) +// or should they be generated e.g. `bind_function("func_name", &func_written_in_C);`? + +// terminology akin to Janet (from _Janet for Mortals_): +// compile: evaluating the program sources to produce an environment +// runtime: evaluating the environment + + |
