Compilation and Interpretation

The compiler translates the high-level source program into an equivalent target program (typically in machine language) and then goes away.

• The compiler is the locus of control during compilation;

  
  

• the target program is the locus of control during its own execution.

  
  

An alternative style of implementation for high-level languages is known as interpretation.

• Interpreter stays around for the execution of the application.

  
  

• In fact, the interpreter is the locus of control during that execution.

  
  

• Interpretation leads to greater flexibility and better diagnostics (error messages) than does compilation.

  
  

• Because the source code is being executed directly, the interpreter can include an excellent source-level debugger.

  
  

• Delaying decisions about program implementation until run time is known as latebinding;