Parrot Abstract Syntax Tree (PAST)

Represent the abstract operations to be performed

Designed to potentially support several languages

• PAST::Node - base class
• PAST::Op - basic operators
• PAST::Val - values (typically constants)
• PAST::Var - variables
• PAST::Stmts - collection of statements
• PAST::Block - closures
• PAST::Control - control structures

All AST nodes may have "children" nodes