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README
gt -- grammar tool
Generate OCamllex and OCamlyacc files from a single grammar file.
JJ Meyer, Aaron Stump, with contributions from Vilhelm Sjoeberg.


Compilation Instructions:

This part is not needed unless you created a function with mlcf or
an mlcf file was deleted/broken (eg. dump_mlcf_*). We are assuming 
the user is in "gt/" directory:

   make clean
   make
   make update


Assuming you are in "gt/src" directory:

The usage of gt is shown below. Below, file is referring to a path of a 
parseable grammar file. First, from a terminal, navigate to gt/src/. 
Then execute the following commands.
   
   make clean 
   make 
   ./gt file 
   make emitted

The command "make clean" will remove all of the compiled OCaml files. 
The next command "make" will compile gt and generate a file called gt, 
the grammar tool that will generate a parser from a grammar definition. 
To use gt use the command "./gt file" where file is a path to a grammar 
file. Now that gt has generated all of the necessary files use the command 
"make emitted" to compile your parser. 


Once this has been done a parser with the same name as the grammar name in 
the corresponding grammar file has been created. Below is how to use the
generated parser.

./grammar_name [options] <file> 
The options are:
   -p      Reprints the contents of <file> to
           <file>pp.txt. Without this option
           the contents are printed to the terminal.
   -a      Prints a text view of <file>'s AST to 
           <file>ast.txt.
   -g      Outputs a Graphviz file named <file>gviz.dot
           that contains a visual representation of <file>'s
           syntax tree.
   -help   Shows this. 
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