Class ElementGet

  • All Implemented Interfaces:
    Comparable<AstNode>, Iterable<Node>

    public class ElementGet
    extends AstNode
    AST node for an indexed property reference, such as foo['bar'] or foo[2]. This is sometimes called an "element-get" operation, hence the name of the node.

    Node type is Token.GETELEM.

    The node bounds extend from the beginning position of the target through the closing right-bracket. In the presence of a syntax error, the right bracket position is -1, and the node ends at the end of the element expression.

    • Constructor Detail

      • ElementGet

        public ElementGet()
      • ElementGet

        public ElementGet​(int pos)
      • ElementGet

        public ElementGet​(int pos,
                          int len)
    • Method Detail

      • getTarget

        public AstNode getTarget()
        Returns the object on which the element is being fetched.
      • setTarget

        public void setTarget​(AstNode target)
        Sets target object, and sets its parent to this node.
        target - expression evaluating to the object upon which to do the element lookup
        IllegalArgumentException - if target is null
      • getElement

        public AstNode getElement()
        Returns the element being accessed
      • setElement

        public void setElement​(AstNode element)
        Sets the element being accessed, and sets its parent to this node.
        IllegalArgumentException - if element is null
      • getLb

        public int getLb()
        Returns left bracket position
      • setLb

        public void setLb​(int lb)
        Sets left bracket position
      • getRb

        public int getRb()
        Returns right bracket position, -1 if missing
      • setRb

        public void setRb​(int rb)
        Sets right bracket position, -1 if not present
      • setParens

        public void setParens​(int lb,
                              int rb)
      • toSource

        public String toSource​(int depth)
        Description copied from class: AstNode
        Emits source code for this node. Callee is responsible for calling this function recursively on children, incrementing indent as appropriate.

        Note: if the parser was in error-recovery mode, some AST nodes may have null children that are expected to be non-null when no errors are present. In this situation, the behavior of the toSource method is undefined: toSource implementations may assume that the AST node is error-free, since it is intended to be invoked only at runtime after a successful parse.

        Specified by:
        toSource in class AstNode
        depth - the current recursion depth, typically beginning at 0 when called on the root node.
      • visit

        public void visit​(NodeVisitor v)
        Visits this node, the target, and the index expression.
        Specified by:
        visit in class AstNode
        v - the object to call with this node and its children