[flang-commits] [flang] [Flang] Add a Fortran Standards Support doc (PR #132195)

[via flang-commits]

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+<!--===- docs/FortranStandardsSupport.md
+
+   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+   See https://llvm.org/LICENSE.txt for license information.
+   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+-->
+
+# Flang Fortran Standards Support
+
+```{contents}
+---
+local:
+---
+```
+
+This document summarizes Fortran standards support in Flang. The information is only provided as a guideline. The
+TODOs/Not Yet Implemented messages emitted by the compiler for unimplemented features should be treated as authoritative.
+
+The standards support information is provided as a table with three columns that are self explanatory. No distinction is
+made between the support in the Parser/Semantics and MLIR or Lowering support. The Status column uses
+the letters **P**, **Y**, **N** for the implementation status:
+- **P** : When the implementation is incomplete for a few cases
+- **Y** : When the implementation is complete
+- **N** : When the implementation is absent
+
+There is no distinction made between support in the Parser/Semantics and the MLIR or Lowering stages.
----------------
h-vetinari wrote:

This sentence is now repeated (just above the P/Y/N there's an equivalent one).

https://github.com/llvm/llvm-project/pull/132195