- says that names from namespace IMPORT_SRC should be visible within
- namespace IMPORT_DEST. These form a linked list; NEXT is the next element
- of the list. If the imported namespace has been aliased, ALIAS is set to a
- string representing the alias. Otherwise, ALIAS is NULL.
- Eg:
- namespace C = A::B;
- ALIAS = "C"
- DECLARATION is the name of the imported declaration, if this import
- statement represents one.
- Eg:
- using A::x;
- Where x is variable in namespace A. DECLARATION is set to x.
-*/
+ says that names from namespace IMPORT_SRC should be visible within namespace
+ IMPORT_DEST. These form a linked list; NEXT is the next element of the
+ list. If the imported namespace or declaration has been aliased within the
+ IMPORT_DEST namespace, ALIAS is set to a string representing the alias.
+ Otherwise, ALIAS is NULL. DECLARATION is the name of the imported
+ declaration, if this import statement represents one. Otherwise DECLARATION
+ is NULL and this import statement represents a namespace.
+
+ C++: using namespace A;
+ Fortran: use A
+ import_src = "A"
+ import_dest = local scope of the import statement even such as ""
+ alias = NULL
+ declaration = NULL
+
+ C++: using A::x;
+ Fortran: use A, only: x
+ import_src = "A"
+ import_dest = local scope of the import statement even such as ""
+ alias = NULL
+ declaration = "x"
+ The declaration will get imported as import_dest::x.
+
+ C++: namespace LOCALNS = A;
+ Fortran has no way to address non-local namespace/module.
+ import_src = "A"
+ import_dest = local scope of the import statement even such as ""
+ alias = "LOCALNS"
+ declaration = NULL
+ The namespace will get imported as the import_dest::LOCALNS namespace.
+
+ C++ cannot express it, it would be something like: using localname = A::x;
+ Fortran: use A, only localname => x
+ import_src = "A"
+ import_dest = local scope of the import statement even such as ""
+ alias = "localname"
+ declaration = "x"
+ The declaration will get imported as localname or `import_dest`localname. */