Name Rascal/Expressions/Values/Node

Synopsis Node values.

Syntax Exp0 ( Exp1, Exp2, ... )

Types

Exp0	Exp1	Exp2	...	Exp0 ( Exp1, Exp2, ... )
str	value	value	...	node

Usage import Node; (included in prelude)

Details Equal GreaterThan GreaterThanOrEqual LessThan LessThanOrEqual NotEqual Slice Subscription

Description Values of type node represent untyped trees and are constructed as follows:

• the string value of Exp0 is the node name;
• zero or more expressions of type value are the node's children.

Nodes can have Annotations.

The following are provided for nodes:

• Equal: Equal operator on node values.
• GreaterThan: Greater than operator on node values.
• GreaterThanOrEqual: Greater than or equal operator on node values.
• LessThan: Less than operator on node values.
• LessThanOrEqual: Less than or equal operator on node values.
• NotEqual: Not equal operator on node values.
• Slice: Retrieve a slice of a node's argument list.
• Subscription: Retrieve an argument of a node via its index.

Examples A node with name "my_node" and three arguments

rascal>"my_node"(1, true, "abc");
node: "my_node"(1,true,"abc")

A nested node structure:

rascal>"my_node1"(1, "my_node2"(3.5, ["a", "b", "c"]), true);
node: "my_node1"(
  1,
  "my_node2"(
    3.5,
    ["a","b","c"]),
  true)

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