Programmatically generate language specifications

[mdpiper]

The language specification files for C, C++, Fortran, and Python should be programmatically generated from the same source (such as the BMI SIDL file). They are currently created manually.

[mdpiper]

Also do this for any other language we add (Julia, R, MATLAB/Octave).

[mdpiper]

If we start from the SIDL file, we'd have to write a parser for it. Instead, as @mcflugen suggests, describe the BMI in a YAML file and generate the language specs (as well as the SIDL file!) from it; e.g.,

name: get_component_name
args:
  - name: name
    type: str
    intent: out

name: get_value
args:
  - name: var
    intent: in
    type: str
  - name: buffer
    type: array[float]
    intent: in

[mdpiper]

This would also obviate a problem like csdms/bmi-python#6.

[mdpiper]

TOML is now the flavor of the day. Sorry, YAML.

[mdpiper]

This issue is a task in the CSDMS 4 proposal. Moving to the BMI 3.0 milestone.