• OVERWRITTEN CODE
• Terminology
• Black-box v.s. White-box overwritting
• How AutoCode tries to avoid or intend to overwrite the method?
• Principle
• Solution 1
• Solution 2
• AM

OVERWRITTEN CODE

How to make the same method with different code?

It sounds weird for normal programmer, who never hacks the Perl and does the regular job.

Before this auto code generators appear, there is already such problem that one methods in a Perl module can be overwritten.

Terminology

CG - Code Generator

AM = AccessorMaker

Black-box v.s. White-box overwritting

• Black-box
  
The code is known neither on what the code inside is, nor what it does at all.
• Gray-box
  
Parially the function of the code is known, but the implementation of it remains concealed.
• White-box
  
The implementation of it can be detected by human or other code.

How AutoCode tries to avoid or intend to overwrite the method?

Principle

Supposed the user understands what AM does. The priority of user's code is always higher than the one generated by AM.

CG may never overwrite the existing code, while user's code may overwrite CG'ed code.

Can we do anything to avoid user overwrite CG's code?

Potentially, other CG may overwrite the existing code, even the user written ones.

Users are suggested to overwrite AM generated code by subclassing the class and override them.

Solution 1

In AM, there is a %MADE_ACCESSORS hash with keys as the fully qualified method names and keys as whatever non-zero values.

    $MADE_ACCESSORS{$glob}=1;

Solution 2

The assisted modeul/class, CG addes a %MADE_BY for each of them.

    $MADE_BY{$method_name}='AM';

AM

AM is the lowest level CG.