The AST OO Layer

The commands as described in the script library are a procedural interface to abstract syntax trees and their nodes. Access is done via tree handles (and node indices).

Through the use of command aliases an object oriented interface is available as well. So, under the assumption that

• tree is a variable containing a tree handle.
• n is a variable containing a node index.
• node is a variable containing the node handle for the node described by tree and n.

the mapping is defined as

• $node == $tree.n$n
• $tree method args... == ::parsetools::ast::TreeCmd $tree method args... == ::parsetools::ast::Tmethod $tree args...
• $node method args... == ::parsetools::ast::NodeCmd $tree $n method args... == ::parsetools::ast::Nmethod $tree $n args...

$node parent
==>
::parsetools::ast::NodeCmd $tree $n parent
==>
::parsetools::ast::Nparent $tree $n