ada@gentoo.org Compile with dev-lang/gnat-gpl-2016 Compile with dev-lang/gnat-gpl-2017 Compile with dev-lang/gnat-gpl-2018 Compile with dev-lang/gnat-gpl-2019 ASIS is a library that gives applications access to the complete syntactic and semantic structure of an Ada compilation unit. This library is typically used by tools that need to perform some sort of static analysis on an Ada program.