4.3 sdds::Layout

• name:
  sdds::Layout
• description:
  Describe the complete SDDS header: description text, parameters, arrays, columns, associates, data-mode options, and protocol version. Field definitions use ParameterDefinition, ArrayDefinition, ColumnDefinition, and AssociateDefinition. The layout retained by a reader or page is immutable from the caller’s point of view.
• synopsis:
  std::size_t parameterIndex(std::string_view name) const;  
  std::size_t arrayIndex(std::string_view name) const;  
  std::size_t columnIndex(std::string_view name) const;  
  std::size_t associateIndex(std::string_view name) const;

• arguments:
  • name — Exact field or associate name.
• return value:
  The zero-based definition index in file order.
• exceptions:
  sdds::StateError if the requested name is absent. Layout construction and validation may also report sdds::FormatError or sdds::TypeError for an invalid definition.
• see also:
  Sections 4.4 and 4.5.