TODO for beta

[certik]

In order to reach beta quality, we need to implement the following items:

• compile at least 10 codes without any workaround (except the items listed in "after beta" below):
  • legacy minpack
  • 60% of SciPy (common blocks and other old features are needed for the rest, we'll tackle after beta)
  • modern minpack
  • fastGPT
  • dftatom
  • stdlib with small workarounds (due to the issues above)
  • lapack Compile Lapack #1232 @Shaikh-Ubaid
  • SNAP compiling SNAP #3951 @kmr-srbh, @assem2002
  • prima
  • fpm
• All instrinsic functions working (compile time, runtime): @HarshitaKalani, @parth121101
  • List of Standard generic intrinsic procedure #492
  • GSoC: Intrinsic functions #4017
• Implementing a simplifier pass for managing creation temporary variables and allocatables #3748: @czgdp1807
• robust deallocation (ASR: idea: add explicit nodes to free non-primitive types #3770): @gxyd
• most OOP features (@tanay-man)
• --fast working in all cases (not strictly needed, but would be good to have)
• Redesigning strings #2257
• robust compile time computation (An example for compile time evaluation #3203): @Pranavchiku, @nikabot
• Change the ASR representation of ArrayConstant #3581: @Pranavchiku
• Compiling to WASM via LLVM (few demos, easy to use): @Shaikh-Ubaid
• Test the emscripten-based LLVM backend at the CI (use nodejs to ensure passing data/arrays from JavaScript to Fortran/WASM works) LLVM_WASM: Test emscripten generated wasm in integration_tests #3954

After we reach beta, we will tackle the following:

• Everything working in interactive mode and Jupyter notebook (@Vipul-Cariappa)
• coarrays
• parallel loops:
  • OpenMP: OpenMP support in AST and ASR #3777: @Pranavchiku
  • GPU offloading, etc.
• submodules
• full generics support (interface based)
• quadruple precision: Quadruple (and higher) precision design #3468
• good support for lists, dicts and other LPython data structures which we'll support as Fortran extensions (@advikkabra)
• good error messages for all invalid code
• Debug time checks (bounds checks, pointer checks, integer overflow, etc.)
• common block and other F77 features that should not be used in new codes (but we have to support to compile old codes)
• separate compilation (generate intermediate object files, link everything at the end), add robust first class support for .o files for all backends: LLVM, WASM, WASM/x64, etc., in all cases (all ASR); to allow good interoperability with other toolchains (so that the user can link this into libraries or codes together with other code)
• Other backends:
  • WASM
  • C/C++
  • SIMD backend #2293

Also discussed at https://lfortran.zulipchat.com/#narrow/stream/197339-general/topic/TODO.20for.20Beta.