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Contents
{AST} is a library for manipulating abstract syntax trees.
It embraces immutability; each AST node is inherently frozen at
creation, and updating a child node requires recreating that node
and its every parent, recursively.
This is a design choice. It does create some pressure on
garbage collector, but completely eliminates all concurrency
and aliasing problems.
See also {AST::Node}, {AST::Processor::Mixin} and {AST::Sexp} for
additional recommendations and design patterns.
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