* The warning was already here, this commit only refactors things so that
it can be controled with -Mstandard.
* Also makes the warning point to the do-stmt and adds a note to the warning
pointing to the statements where it ends.
Original-commit: flang-compiler/f18@11e1eb6edd
Reviewed-on: https://github.com/flang-compiler/f18/pull/552
Tree-same-pre-rewrite: false
Refactor to create the Semantics class that is responsible for holding
state during semantics (the scope tree and messages) and managing the
logic of the various phases of semantic processing. Eliminate static
Scope::globalScope.
The messages generated during semantic processing are accumulated in a
Messages data member of Semantics so that individual phases don't need
to emit them to std::cerr. This is now done by the driver so that it has
control over where they go and eliminates other includes of iostream.
To do this, the messages object is passed in to the various semantics
operations.
Move DumpSymbols into semantics.cc: it doesn't belong in resolve-names.cc
and it depends on the global scope, so it's as good a place as any.
The call to RewriteParseTree is also moved to Semantics.
Original-commit: flang-compiler/f18@771d0e1293
Reviewed-on: https://github.com/flang-compiler/f18/pull/186
Tree-same-pre-rewrite: false
