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- only checked if it started with '/' and not 'd:/' (for example).

- start of work to create a 1-to-1 face mapping across AMI patches
- faces are inserted according to the AMI addressing based on Horacio's method
- removed 'updated' flag and reworked some demand driven updates
- updated to handle 'walking' through baffles
- use bitSet instead of boolList
- moved update of meshPhi to movePoints() functions at fvPatch level
- moved scaling of areas to movePoints() functions at fvPatch level
- rehomed topology change code to own file
- added warning re: geometry construction

ACMI
- split srcMask into srcMask and srcAreaMask
  - former in range 0-1, and latter has bounding or tol to (1-tol) to avoid
    sigFpe's

- only checked if it started with '/' and not 'd:/' (for example).

This e.g. was giving a problem with using volPointInterpolation (in
functionObjects) with non-blocking global reductions.

- refinement of commit 33f9ae50.

  After foamDictionary -expand, the '2.0' becomes '2', so accept that
  as a reasonable token.

  ENH: update libs of etc/caseDicts/postProcess items
  ENH: ensure destructor=default
  ENH: ensure constness
  ENH: ensure no 'copy construct' and 'no copy assignment' exist
  TUT: add examples of function objects with full set
       of settings into a TUT if unavailable
  TUT: update pisoFoam/RAS/cavity tutorial in terms of usage

  ENH: add Test-EigenMatrix application

  The new iterative eigen decomposition functionality is
  derived from:

    Passalacqua et al.'s OpenQBMM (openqbmm.org/),
    which is mostly derived from JAMA (math.nist.gov/javanumerics/jama/).

  ENH: return zero-valued matrix when input zero-valued matrix in pinv()

- bundled of boolean values as a vector of 3 components with
  element access using x(), y() and z() member functions.
  It also has some methods similar to bitSet.

- Not derived from Vector or VectorSpace since it does not share very
  many vector-like characteristics.

- support construct from initializer_list, which can help simplify
  code with constant coefficients.

- add default constructor for polynomialFunction and Istream reading
  to support resizable lists of polynomialFunction.

  A default constructed polynomialFunction is simply equivalent to
  a constant zero.

- no special IO handling for Polynomial required,
  it is the same as VectorSpace anyhow.

- previously introduced `getOrDefault` as a dictionary _get_ method,
  now complete the transition and use it everywhere instead of
  `lookupOrDefault`. This avoids mixed usage of the two methods that
  are identical in behaviour, makes for shorter names, and promotes
  the distinction between "lookup" access (ie, return a token stream,
  locate and return an entry) and "get" access (ie, the above with
  conversion to concrete types such as scalar, label etc).

- Favour use of argList methods that are more similar to dictionary
  method names with the aim of reducing the cognitive load.

  * Silently deprecate two-parameter get() method in favour of the
    more familiar getOrDefault.
  * Silently deprecate opt() method in favour of get()

  These may be verbosely deprecated in future versions.

- centralizes sizing information and typedefs
  without dependencies beyond <cstdint>

COMP: ensure label typedef exists for nullObject.H

STYLE: adjust code comments

- similar to the behaviour of std::ignore and consistent with the
  no input / no output nature of nullObject. Similarly accept a
  const reference for its Istream operator.

- make most nullObject methods constexpr

- mostly wraps std::chrono so can inline much of it, which is potentially
  helpful when used for inner timings.

- add elapsedTime() method for direct cast to double and for
  naming similarity with wall-clock method.

Potential breaking change (minor):

- clockValue construct with a bool parameter is now simply tagged
  dispatch (value is ignored) and always queries the current clock
  value. This avoids needless branching.
  Since this constructor form has primarily been used internally (eg,
  clockTime), breakages in user code are not expected.

- have printBuildInfo output to std::ostream
- removed extraneous include "stdFoam.H"

ENH: revert to pre-processor defines for hard-coded paths (#1712)

- redundant information, but more robust at run-time without relying
  on initialization order

- exhibited apparent issues with initialization order (on some
  installations of gcc-4.8.5) when a variable was used.

- previously relied on presence/absence of command-line options.
  Can now explicitly disable individually

- provide shorter constructors for dealing with these types of cases.
  Make construction with non-default names for "system" and "constant"
  lengthier so there is no ambiguity.

For example,

    const edge meshE(patch.meshPoints(), patch.edges()[edgei]);