| from itertools import chain | |
| from sympy.codegen.fnodes import Module | |
| from sympy.core.symbol import Dummy | |
| from sympy.printing.fortran import FCodePrinter | |
| """ This module collects utilities for rendering Fortran code. """ | |
| def render_as_module(definitions, name, declarations=(), printer_settings=None): | |
| """ Creates a ``Module`` instance and renders it as a string. | |
| This generates Fortran source code for a module with the correct ``use`` statements. | |
| Parameters | |
| ========== | |
| definitions : iterable | |
| Passed to :class:`sympy.codegen.fnodes.Module`. | |
| name : str | |
| Passed to :class:`sympy.codegen.fnodes.Module`. | |
| declarations : iterable | |
| Passed to :class:`sympy.codegen.fnodes.Module`. It will be extended with | |
| use statements, 'implicit none' and public list generated from ``definitions``. | |
| printer_settings : dict | |
| Passed to ``FCodePrinter`` (default: ``{'standard': 2003, 'source_format': 'free'}``). | |
| """ | |
| printer_settings = printer_settings or {'standard': 2003, 'source_format': 'free'} | |
| printer = FCodePrinter(printer_settings) | |
| dummy = Dummy() | |
| if isinstance(definitions, Module): | |
| raise ValueError("This function expects to construct a module on its own.") | |
| mod = Module(name, chain(declarations, [dummy]), definitions) | |
| fstr = printer.doprint(mod) | |
| module_use_str = ' %s\n' % ' \n'.join(['use %s, only: %s' % (k, ', '.join(v)) for | |
| k, v in printer.module_uses.items()]) | |
| module_use_str += ' implicit none\n' | |
| module_use_str += ' private\n' | |
| module_use_str += ' public %s\n' % ', '.join([str(node.name) for node in definitions if getattr(node, 'name', None)]) | |
| return fstr.replace(printer.doprint(dummy), module_use_str) | |