Fix class Lexer: Parser are not friend.
Fix register of error msg.
Fix error msg (see last commit).
Rename folder.
Simple expr parser: add test.
Rename test-driver for simple expr parser.
Fix tokens: remove DEFAULT, init subType in constructor.
Add tests for expr parser.
Add test-driver for expr parser.
Great fix of nodes for parser.
Fix nodes:
add field to NodeCall;
add field to NodeArr;
fix constructors;
fix 'print' functions.
Fix error msg.
New life of expr parser.
Fix indent in tests.
Expression parser: add new tests.
Remove VOID as type from project.
Expr parser: fix result of test.