Fortran 2008 [1] adds support for a new syntax related to modules:
submodule ( ParentModule ) SubModule
submodule ( ParentModule : SubModule ) NestedSubModule
Both of these mean that the current source file requires the module
`ParentModule` to be available if it is not provided in the current
file. Teach our Fortran dependency scanner to parse this syntax to
extract this relationship. For now simply tolerate the nested submodule
case and extract only the dependency it expresses on the main module.
Further work will be needed to extract dependencies among nested
submodules.
[1] http://fortranwiki.org/fortran/show/Fortran+2008Closes: #16234
Fortran allows the syntax
MODULE PROCEDURE ...
MODULE FUNCTION ...
MODULE SUBROUTINE ...
to declare procedures/functions/subroutines that are members of modules.
Do not treat such syntax as the definition of a module with one of these
names.
Issue: #16234
Teach the lexer to match and return specific Fortran keywords as tokens.
Update the parser to use these instead of always using a WORD token and
then checking the text. This avoids extra string comparisons and will
allow more grammar productions to be unambiguously added later for
additional Fortran statements.
Our Fortran grammar is a bare minimum to extract dependencies.
Other statement syntax can be ignored, so simply skip to the
end of unrecognized statements. This allows some of our existing
productions to be dropped.
Teach the lexer to extract the #line directive prefix and line number as
a new token type. Teach the parser to recognize this token followed by
a string as the file name (plus possibly other content). Report the
named file as included by the source file.
The parser can be re-used outside cmDependsFortran or the cmDepends
class hierarchy so drop the "Depends" from its name:
rename 's/DependsFortran([A-Za-z0-9_])/Fortran$1/' Source/*.*
sed -i 's/DependsFortran\([A-Za-z0-9_]\)/Fortran\1/g' Source/*.*
sed -i 's/FortranInternals/DependsFortranInternals/g' Source/*.*
Also manually fix Source/CMakeLists.txt source file ordering.
Brad King
Kitware Robot