Function extractPointerAndConstantWithPosition

optimizer/sum_range.go:156–172

extractPointerAndConstantWithPosition extracts pointer (#) and integer constant from a binary node. Returns (pointer, constant, pointerOnLeft) or (nil, nil, false) if not matching the expected pattern.

(binary *BinaryNode)

// extractPointerAndConstantWithPosition extracts pointer (#) and integer constant from a binary node.
// Returns (pointer, constant, pointerOnLeft) or (nil, nil, false) if not matching the expected pattern.
func extractPointerAndConstantWithPosition(binary *BinaryNode) (*PointerNode, *IntegerNode, bool) {
	// Try left=pointer, right=constant
	if pointer, ok := binary.Left.(*PointerNode); ok && pointer.Name == "" {
		if constant, ok := binary.Right.(*IntegerNode); ok {
			return pointer, constant, true
		}
	}

	// Try left=constant, right=pointer
	if constant, ok := binary.Left.(*IntegerNode); ok {
		if pointer, ok := binary.Right.(*PointerNode); ok && pointer.Name == "" {
			return pointer, constant, false
		}
	}

	return nil, nil, false
}