[--output OUTPUT_FILE] [--define-var KEY=VALUE] [-- force] [--grid-origin] [--drill-origin] [--no-unspecified] [--no-dnp] [--subst-models] [--board- only] [--include-tracks] [--include-zones] [--min-distance file. --drill-origin Use drill origin as origin of output file. --no-unspecified Exclude 3D models of components with 'unspecified' footprint type. --no-dnp Exclude 3D models of components with 'Do not [--output OUTPUT_FILE] [--define-var KEY=VALUE] [-- force] [--grid-origin] [--drill-origin] [--no-unspecified] [--no-dnp] [--subst-models] [--board- only] [--include-tracks] [--include-zones] [--min-distance

Certain other aspects and operations of the abstract machine are described in this document as unspecified […]. Where possible, this document defines a set of allowable behaviors. These define the nondeterministic Implementation-defined (and documented) allowable behaviors of the abstract machine • Non-deterministic • Unspecified (undocumented) set of allowable behaviors of the abstract machine CppCon 2020 - The Abstract Implementation-defined (and documented) allowable behaviors of the abstract machine • Non-deterministic • Unspecified (undocumented) set of allowable behaviors of the abstract machine • Operations can be undefined

pilfering) Bar bar0; //...populate bar0 Bar bar1 = std::move(bar0); bar0 bar1 bar0 “Valid but Unspecified state” Pilfered state Before std::move After std::moveCharley Bay - charleyb123 at gmail dot Symmetry: std::move • std::move is tricky because: • Is NOT symmetric (pilfered-from object has Unspecified mutation) • Is NOT orthogonal (pilfered-from and pilfered-into objects are related) Motivation pilfering) Bar bar0; //...populate bar0 Bar bar1 = std::move(bar0); bar0 bar1 bar0 “Valid but Unspecified state” Pilfered state std::move is tricky because it represents a symmetry violation Before

josuttis | eckstein err 3下rcommunication Valid but Unspecified State std: :vector coll1 coll.reserve(3) ; std: :string sfgetData()} 7 2 < | | col1.push_back (std: :move(s)) JarUaIa Amoved-from library object a valid but unspecified state 下 5 [a[a[tTaIol] std: :cout << s1 MDK, some value AN int 工 (x) ) 7 一 Signals "1mno Ionger need tis value jhere" - A moved-from objects is in a valid but unspecified state ， Any operation without any assumption about the value is fne josuttis | eckstein C++ 6

attribute set will not be included in the exported STEP model. Ignore 'Unspecified' components: If enabled, components with the Unspecified footprint type will not be included in the exported STEP model. hole, or Unspecified. A footprint’s type affects KiCad’s behavior in a few ways: Footprint type controls the default type of new pads added to the footprint. For through hole and Unspecified footprints the tool ( ). New pads in SMD footprints are SMD by default, while new pads in Through Hole and Unspecified footprints will be through hole. Each new pad will have its pad number incremented by 1 relative

attribute set will not be included in the exported STEP model. Ignore 'Unspecified' components: If enabled, components with the Unspecified footprint type will not be included in the exported STEP model. hole, or Unspecified. A footprint’s type affects KiCad’s behavior in a few ways: Footprint type controls the default type of new pads added to the footprint. For through hole and Unspecified footprints the tool ( ). New pads in SMD footprints are SMD by default, while new pads in Through Hole and Unspecified footprints will be through hole. Each new pad will have its pad number incremented by 1 relative

41.6We found so many of them! 41.7We found so many of them! 41.8Use _LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STABILIT with libcxx 42Strict weak ordering Irreflexivity: is false Asymmetry: and cannot 75.7WHAT CAN YOU DO? 76WHAT CAN YOU DO? If you use libcxx, enable - D_LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STAB -D_LIBCPP_DEBUG_STRICT_WEAK_ORDERING_CHEC D_LIBCPP_ENABLE_DEBUG_MODE=1 in your debug builds builds 76.1WHAT CAN YOU DO? If you use libcxx, enable - D_LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STAB -D_LIBCPP_DEBUG_STRICT_WEAK_ORDERING_CHEC D_LIBCPP_ENABLE_DEBUG_MODE=1 in your debug builds Probably randomization

attribute set will not be included in the exported STEP model. Ignore 'Unspecified' components: If enabled, components with the Unspecified footprint type will not be included in the exported STEP model. hole, or Unspecified. A footprint’s type affects KiCad’s behavior in a few ways: Footprint type controls the default type of new pads added to the footprint. For through hole and Unspecified footprints the tool ( ). New pads in SMD footprints are SMD by default, while new pads in Through Hole and Unspecified footprints will be through hole. Each new pad will have its pad number incremented by 1 relative

● What is Undefined Behavior – And what it is not – UB vs implementation-defined behavior vs unspecified behavior ● Why have UB in programming languages? ● How is UB related to performance? ● UB and Undefined vs unspecified ● C++ standard does not specify behavior of every program ● Undefined behavior: the entire program is ill-formed delete p; p foo(); → int x = -42; x << 7; ● Unspecified behavior: