The Free On-line Dictionary of Computing (30 December 2018):

language-sensitive editor
language-based editor

   An editor that is aware of the syntactic, semantic and in some
   cases the structural rules of a specific programming language
   and provides a framework for the user to enter source code.
   Programs or changes to previously stored programs are
   incrementally parsed into an abstract syntax tree and
   automatically checked for correctness.

   (1995-02-15)