NodeDot                        // The cursor, dot.
	nodeElse                       // An else action. Not added to tree.
	nodeEnd                        // An end action. Not added to tree.
	NodeField                      // A field or method name.
	NodeIdentifier                 // An identifier; always a function name.
	NodeIf                         // An if action.
	NodeList                       // A list of Nodes.

		}
		// Compatibility with original API: If the term is of type NodeField
		// or NodeVariable, just put more fields on the original.
		// Otherwise, keep the Chain node.
		// Obvious parsing errors involving literal values are detected here.
		// More complex error cases will have to be handled at execution time.
		switch node.Type() {
		case NodeField:
			node = t.newField(chain.Position(), chain.String())
		case NodeVariable:

		{"NodeBreak", Const, 18},
		{"NodeChain", Const, 1},
		{"NodeCommand", Const, 0},
		{"NodeComment", Const, 16},
		{"NodeContinue", Const, 18},
		{"NodeDot", Const, 0},
		{"NodeField", Const, 0},
		{"NodeIdentifier", Const, 0},
		{"NodeIf", Const, 0},
		{"NodeList", Const, 0},
		{"NodeNil", Const, 1},
		{"NodeNumber", Const, 0},
		{"NodePipe", Const, 0},