# Uses of Package
s3games.engine.expr

- Packages that use s3games.engine.expr
  Package | Description
  --- | ---
  s3games.engine |
  s3games.engine.expr |

- Classes in s3games.engine.expr used by s3games.engine
  Class and Description
  Context Holds a context of evaluation - as the rules are matched against locations and elements, the indexing variables are filled with values.
  Expr Abstract class for all expression types.
  Expression Represent a named expression with named formal arguments.

- Classes in s3games.engine.expr used by s3games.engine.expr
  Class and Description
  Context Holds a context of evaluation - as the rules are matched against locations and elements, the indexing variables are filled with values.
  Expr Abstract class for all expression types.
  Expr.internalFunction list of all supported internal functions
  Expr.operatorType list of all supported internal operators
  Expression Represent a named expression with named formal arguments.
  Lexeme All lexemes are derived from this general lexeme class