[Origin of MapleFE]

This project is to create a programming language frontend, which leverages 'Autogen' to complete
most of work of lexing and parsing. The origin of this project is coming from the history in our parst twenty
years of work in compiler and programming languages. We are tired of the tons of modifications of existing
opensource frontend project like Clang, if we want to do something in new language features. So we decided to
have our own frontend, which could be easier to handle new languages.

[Key points]

1. Autogen is the key idea which automatically generates lexing/parsing data structures in .h/.cpp files which
   are further included in the language frontend. The language implementors write .spec files describing the
   language specifications under the language directory, such as java/.
2. A finite state automata is the key idea of parsing the programming language.

[Source code directory]

1. Most programming languages have very similar syntax, so it's very helpful to put
   the shared part into a common directory. shared/ is for this usage. It contains
     a) shared data structures representing shared syntax;
     b) shared parser/translater components; 
2. Language specific parts are in their own directory, such as java/. It contains some special part of this
   language, the language .spec files, and gen_xxx.h/gen_xxx.cpp which are generted by autogen.
3. The tool autogen is under autogen/

[How to build]

1. cd YOUR_PROJECT_DIR
2. make
3. If you are working at Java frontend, you will see build64/java/java2mpl. This is the executable
   frontend.

[How to test]

1. cd YOUR_PROJECT_DIR/test
2. ./runtests.pl all

You can find all Java test cases in YOUR_PROJECT_DIR/test/java2mpl. Right now only java test cases
are used.