Parse parsed the given text and return a node Parser.

ArrayNode holds start, end, step information for array index selection.

FieldNode holds field of struct.

FilterNode holds operand and operator information for filter.

FloatNode holds float value.

IdentifierNode holds an identifier.

IntNode holds integer value.

ListNode holds a sequence of nodes.

ParamsEntry holds param information for ArrayNode.

RecursiveNode means a recursive descent operator.

TextNode holds plain text.

UnionNode is union of ListNode.

WildcardNode means a wildcard.

NodeType identifies the type of a parse tree node.