=========================
CPW Pt.6 Expression Trees
=========================

This is a longer workout and split into three steps:

- Step (A):  __Some Design Patterns__
- Step (B):  __Some Implementation Patterns__
- Step (C):  __Integrating the Expr Class__ into the calculator
- And there is an optional quiz: __Quiz 20__ with 20 bonus points

For the quiz you simply have to submit the class for expression trees and the
new implementation for the calculator. In the videos you can see the complete
implementation. Of course you can apply further improvements or bug fixes (for
both bugs in code and typos in comments).

As code base you can use either your own code or the codes used in the video:

---- SHELL (path=session18/git, hide) ------------------------------------------
rm -rf abc
git clone git@gitlab.com:uni-ulmulm-university-department-of-numerical-analysis/abc.git
git config --global advice.detachedHead false
--------------------------------------------------------------------------------

---- SHELL (path=session18/git/abc, hide) --------------------------------------
git checkout tags/calc-quiz-sol
--------------------------------------------------------------------------------

:import: session18/git/abc/lexer.c [fold]
:import: session18/git/abc/lexer.h [fold]
:import: session18/git/abc/tokenkind.c [fold]
:import: session18/git/abc/tokenkind.h [fold]
:import: session18/git/abc/xtest_calc.c [fold]



:links: Some Design Patterns -> doc:session18/page02
	Some Implementation Patterns -> doc:session18/page03
	Integrating the Expr Class -> doc:session18/page04
	Quiz 20 -> doc:session18/page05