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Maintenance Ruby 3.3 gets fixes, but no new features. Switch to Ruby 4.0 →

class method

RubyVM::AbstractSyntaxTree.of

RubyVM::AbstractSyntaxTree.of(proc, keep_script_lines: RubyVM.keep_script_lines, error_tolerant: false, keep_tokens: false) → RubyVM::AbstractSyntaxTree::Node
RubyVM::AbstractSyntaxTree.of(method, keep_script_lines: RubyVM.keep_script_lines, error_tolerant: false, keep_tokens: false) → RubyVM::AbstractSyntaxTree::Node

Returns AST nodes of the given proc or method.

Example
RubyVM::AbstractSyntaxTree.of(proc {1 + 2})
# => #<RubyVM::AbstractSyntaxTree::Node:SCOPE@1:35-1:42>

def hello
  puts "hello, world"
end

RubyVM::AbstractSyntaxTree.of(method(:hello))
# => #<RubyVM::AbstractSyntaxTree::Node:SCOPE@1:0-3:3>

See ::parse for explanation of keyword argument meaning and usage.