The RubyVM module provides some access to Ruby internals. This module is for very limited purposes, such as debugging, prototyping, and research. Normal users must not use it.
AbstractSyntaxTree provides methods to parse Ruby code into abstract syntax trees. The nodes in the tree are instances of RubyVM::AbstractSyntaxTree::Node.
The InstructionSequence class represents a compiled sequence of instructions for the Ruby Virtual Machine.
With it, you can get a handle to the instructions that make up a method or a proc, compile strings of Ruby code down to VM instructions, and disassemble instruction sequences to strings for easy inspection. It is mostly useful if you want to learn how the Ruby VM works, but it also lets you control various settings for the Ruby iseq compiler.
You can find the source for the VM instructions in
insns.def in the
The instruction sequence results will almost certainly change as Ruby changes, so example output in this documentation may be different from what you see.