# Uses of Package
org.springframework.expression.spel.ast

- Packages that use org.springframework.expression.spel.ast
  Package | Description
  --- | ---
  org.springframework.expression.spel.ast | SpEL's abstract syntax tree.
  org.springframework.expression.spel.standard | SpEL's standard parser implementation.

- Classes in org.springframework.expression.spel.ast used by org.springframework.expression.spel.ast
  Class and Description
  Literal Common superclass for nodes representing literals (boolean, string, number, etc).
  Operator Common supertype for operators that operate on either one or two operands.
  Operator.DescriptorComparison A descriptor comparison encapsulates the result of comparing descriptor for two operands and describes at what level they are compatible.
  SpelNodeImpl The common supertype of all AST nodes in a parsed Spring Expression Language format expression.
  TypeCode Captures primitive types and their corresponding class objects, plus one special entry that represents all reference (non-primitive) types.
  ValueRef Represents a reference to a value.

- Classes in org.springframework.expression.spel.ast used by org.springframework.expression.spel.standard
  Class and Description
  SpelNodeImpl The common supertype of all AST nodes in a parsed Spring Expression Language format expression.