ExpressGenGen

ExpressGenGen an Express Code Generator Generator

Compiling

Requirements

• BOOST 1.57
• BOOST_ROOT set to boost install(extracting is sufficent) path
• LUA 5.3.0
• LUA_ROOT set to <lua_extracted>\src, same path should also contain liblua.a

Installing Requirements

wget http://sourceforge.net/projects/boost/files/boost/1.57.0/boost_1_57_0.tar.gz/download -O boost_1_57_0.tar.gz
tar xvf boost_1_57_0.tar.gz 
export BOOST_ROOT=<extracted_dir>
# you need to build BOOST
# and the program_options library should be in $BOOST_ROOT/stage/lib
# if it is in a diffrerent name copy it and rename it.
wget http://www.lua.org/ftp/lua-5.3.0.tar.gz
tar xvf lua-5.3.0.tar.gz
export LUA_ROOT=<extracted_dir>/src
cd $LUA_ROOT 
make generic

How To

• CMakeLists.txt - to use with cmake

mkdir build 
cd build 
cmake ..
make

How It Works ?

+----------------------+                   +----------------------+
|                      |                   |                      |
|                      |                   |                      |
|     Template         |  +--------------> |    ExpressGenGen     |
|                      |                   |                      |
|                      |                   |                      |
+----------------------+                   +----------+-----------+
                                                      |
                                                      |
                                                      |
                                                      |
                                                      |
                                                      |
                                                      v
                                           +----------+------------+
                                           |                       |
                                           |                       |
                                           |       Generated       |
                                           |       Code            |
                                           |                       |
                                           +-----------+-----------+
                                                       |
                                                       |
                                                       |
                                                       |
                                                       |
                                                       |
                                                       |
                                                       v
 +-----------------------+                +------------+-----------+
 |                       |                |                        |
 |                       |                |                        |
 |                       |                |       Compile & run    |
 |     Result            | <--------------+       or interpret     |
 |                       |                |                        |
 |                       |                +------------------------+
 +-----------------------+

Information

• ExpressGenGen's binary is xgengen or xgengen.exe
• First get it built or use a prebuilt version
• ExpressGenGen uses STDIN and STDOUT for communication

How do I execute xgengen ?

• Note: All *nix examples should work on Windows with minor modifications
• Note: All Windows examples should work on *nix with minor modifications
• Real power of ExpressGenGen comes with PIPE

Python output on *nix

cat template.txt | xgengen python > gen.py
chmod a+x gen.py
./gen.py > output.txt

Web output on Windows

type template.txt | xgengen.exe web > out.html
start out.html

Lua Version Check on *nix

Lua target is capable of running the generated code by itself

echo 'Hello ExpressGenGen using :=> "{$$_VERSION$$}"' | xgengen lua

or

echo 'Hello ExpressGenGen using :=> "{$$_VERSION$$}"' | xgengen

(default is lua)

Bash Piped Execution on *nix

cat ./samples/lang_bash_CMakeLists.txt | xgengen bash | bash -

Python Piped Execution on *nix

cat /samples/lang_python_Hello.txt | xgengen python | python