FoldingContext is now part of SemanticsContext. It is created at the
beginning with a default-constructed CharBlock as the location in its
ContextualMessages.
Add PushLocation() to ContextualMessages to remember the previous source
location and set a new one. The old one is restored when the returned
object goes out of scope.
SemanticsContext is now the only state passed in to class ExprAnalyzer,
class Mutator, AnalyzeExpr(), AnalyzeExpressions().
Add Say() convenience functions for reporting errors to ExprAnalyzer.
Original-commit: flang-compiler/f18@70c499ffc4
Reviewed-on: https://github.com/flang-compiler/f18/pull/215
Tree-same-pre-rewrite: false
The new SemanticsContext holds the state of semantics whose lifetime
spans all of the compilations. It contains the scope tree (and so all
symbols), the intrinsics table, messages, and the state of options that
affect semantics (default kinds, search directories, etc.)
Original-commit: flang-compiler/f18@f04ceab81f
Reviewed-on: https://github.com/flang-compiler/f18/pull/215
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
