/* root scope */
struct declaration_scope *root_declaration_scope;
struct declaration_scope *declaration_scope;
/* innermost definition scope. to be used as parent of stream. */
struct definition_scope *definition_scope;
/* root scope */
struct declaration_scope *root_declaration_scope;
struct declaration_scope *declaration_scope;
/* innermost definition scope. to be used as parent of stream. */
struct definition_scope *definition_scope;