A C extension that extracts ruby ASTs
** Note: ** This project is EOL’ed.
ParseTree is a C extension (using RubyInline) that extracts the parse tree for an entire class or a specific method and returns it as a s-expression (aka sexp) using ruby’s arrays, strings, symbols, and integers.
As an example:
[:defn, :conditional1, [:scope, [:block, [:args, :arg1], [:if, [:call, [:lvar, :arg1], :==, [:array, [:lit, 0]]], [:return, [:lit, 1]], nil], [:return, [:lit, 0]]]]]
Features & Problems:
- Uses RubyInline, so it just drops in.
- Uses UnifiedRuby by default, automatically rewriting ruby quirks.
- ParseTree#parse_tree_for_string lets you parse arbitrary strings of ruby.
- Includes parse_tree_show, which lets you quickly snoop code.
echo “1+1” parse_tree_show -f for quick snippet output.
- Includes parse_tree_abc, which lets you get abc metrics on code.
- abc metrics = numbers of assignments, branches, and calls.
- whitespace independent metric for method complexity.
- Includes parse_tree_deps, which shows you basic class level dependencies.
- Does not work on the core classes, as they are not ruby (yet).
Get The CodeIf you just want to use parsetree, you can install it via RubyGems:
gem install parsetreeIf you want to hack on parsetree, clone it from GitHub:
git clone git://github.com/seattlerb/parsetree