2. A Tree-Python Interpreter

• 2.1. Some Help from the Reference Interpreter
  • 2.1.1. Orientation
  • 2.1.2. Python Compilation Example
• 2.2. An Interpreter in Java for the Python AST
  • 2.2.1. Representing the AST in Java
  • 2.2.2. Generating a Java Tree Literal
  • 2.2.3. A Visit from the Evaluator
• 2.3. Type and Operation Dispatch
  • 2.3.1. Operation Dispatch in CPython
  • 2.3.2. Operation Dispatch in Jython 2.7.1
  • 2.3.3. A Java Object Approach
  • 2.3.4. Dispatch via overloading in Java
  • 2.3.5. Dispatch via a Java MethodHandle
  • 2.3.6. Caching Type Decisions
    • A false Assumption?
    • Mapping to a Specialised Implementation
    • Bootstrapping a Call Site
  • 2.3.7. Extension to Unary Operators
  • 2.3.8. Dispatch with Multiple Implementations
    • A TypeHandler for Number operands
    • Specimen Optimisation for Integer
  • 2.3.9. Progress so far
    • Refactoring
    • Reflection
• 2.4. Simple Statements and Assignment
  • 2.4.1. Aims of this Section
  • 2.4.2. Additions to the AST
    • ASDL
    • Visitor
  • 2.4.3. A Look at Variable Scope in CPython
    • Local and Global Namespaces
  • 2.4.4. Generating the Layout
    • Symbol Tables
      • Help from the CPython Compiler
      • Symbol Tables in Java
    • Code Objects
      • In CPython
      • In Java
    • The Frame
      • In CPython
      • Java Frame and Execution Loop
  • 2.4.5. Extending the AST Interpreter
    • Foundation
    • Assignment
    • Function Definition
    • Call
    • The Test Program TestInterp3.java
  • 2.4.6. Efficient load and store
    • A CallSite for Loading a Variable
    • A CallSite for Assignment to a Variable
  • 2.4.7. Optimisation of Function Calls
    • Argument Transfer
    • Re-thinking Closures
      • Adjustments to the Frame
      • Access to Variables
      • Parameters that are Cells
    • A CallSite for a Function Call?