Each Scope now tracks the source locations that it and its nested scopes
span. This is achieved by extending the source range of a scope for each
statement encountered while it is the current scope.
Semantics::FindScope maps a source location (from the cooked character
stream) to the narrowest scope that contains it.
Original-commit: flang-compiler/f18@7b4d2bb113
Reviewed-on: https://github.com/flang-compiler/f18/pull/230
Tree-same-pre-rewrite: false
Create interval.h. Use std::size_t instead of bare size_t. Redefine parser::Name to not be just a bare string.
Break out and rename CharBlock from token-sequence.h for use in the parse tree.
Incremental replacement of name strings with pointers to cooked characters.
Fix case sensitivity problem.
Use new CharBlock encoding to replace strings for real literal constants.
Normalized cooked character stream to lower case.
Simplify parsing now that cooked stream is lower case. Replace Keyword in parse tree.
Add static_asserts to || and recovery parsers to enforce same result types.
Remove needless TODO comment inserted earlier.
Fix case conversion on prefixed character literals (f90_correct/dc04.f90).
Use CharBlock in user-state.h.
Complete transition from nextChar to nextCh (i.e., always use pointers).
Document extensions. Begin work on compiler directive lines.
More documentation work.
Reformat prescan.cc.
More work on compiler directive scanning.
Original-commit: flang-compiler/f18@38d0404e16
Reviewed-on: https://github.com/flang-compiler/f18/pull/29
Tree-same-pre-rewrite: false
