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Note that now mirrorMesh does not delete empty patches anymore.

     fixes #560

- consolidate word::validated() into word::validate() and also allow
  as short form for string::validate<word>(). Also less confusing than
  having similarly named methods that essentially do the same thing.

- more consistent const access when iterating over strings

- add valid(char) for keyType and wordRe

- this represents a partial revert for commit 6a0a8b99

- use allocator class to wrap the stream pointers instead of passing
  them into ISstream, OSstream and using a dynamic cast to delete
  then. This is especially important if we will have a bidirectional
  stream (can't delete twice!).

STYLE:

- file stream constructors with std::string (C++11)

- for rewind, explicit about in|out direction. This is not currently
  important, but avoids surprises with any future bidirectional access.

- combined string streams in StringStream.H header.
  Similar to <sstream> include that has both input and output string
  streams.

- makes the purpose clearer.
  In some places, string::resize() is even simpler.

- use C++11 string::back() in preference to str[str.size()-1]

ENH: add degToRad() multiplier (useful for scalar fields)

- use degToRad() functions throughout instead of scattered local solutions

- use 1024 instead of 1000 since it will be changed internally to 1024 anyhow.

- STLpoint.H
- isoAdvection.C
- checkMesh/writeFields.C

STYLE: drop construct STLpoint(Istream&), since it doesn't make much sense

- No use case for reading via an OpenFOAM stream and tokenizer.
  Should always be parsing ASCII or reading binary directly.

- disable automatically upgrading copyrights in files since changes to
  not automatically imply a change in copyright. Eg, fixing a typo in
  comments, or changing a variable from 'loopI' to 'loopi' etc.

    #includeEtc "caseDicts/setConstraintTypes"
 vs.
    #include "${WM_PROJECT_DIR}/etc/caseDicts/setConstraintTypes"

Adds overset discretisation to selected physics:
- diffusion : overLaplacianDyMFoam
- incompressible steady : overSimpleFoam
- incompressible transient : overPimpleDyMFoam
- compressible transient: overRhoPimpleDyMFoam
- two-phase VOF: overInterDyMFoam

The overset method chosen is a parallel, fully implicit implementation
whereby the interpolation (from donor to acceptor) is inserted as an
adapted discretisation on the donor cells, such that the resulting matrix
can be solved using the standard linear solvers.

Above solvers come with a set of tutorials, showing how to create and set-up
simple simulations from scratch.

- elminate the foamVtkFormatter operator() in favour of xmlAttr.
  Improves readability and the purpose is clearer.

- this shifts responsibility away from caller to the individual writers
  for knowing which file formats are supported and which file ending is
  appropriate. When the writer receives the output format request,
  it can elect to downgrade or otherwise adjust it to what it can
  actually manage (eg, legacy vs xml vs xml-append).

  But currently still just with legacy format backends.

- was generally somewhat fragile. The main problem stems from the fact
  that several interfaces may be attached to a boundary. No trivial
  means of solving this without too much work for a feature that is only
  "nice-to-have".

- no penalty compared to Tuple2, potential future benefits with C++
  constructor forwarding.

- Remove the unused enums() method since it delivers wholly unreliable
  results. It is not guaranteed to cover the full enumeration range,
  but only the listed names.

- Remove the unused strings() method.
  Duplicated functionality of the words(), but was never used.

- Change access of words() method from static to object.
  Better code isolation. Permits the constructor to take over
  as the single point of failure for bad input.

- Add values() method

- do not expose internal (HashTable) lookup since it makes it more
  difficult to enforce constness and the implementation detail should
  not be exposed. However leave toc() and sortedToc() for the interface.

STYLE: relocated NamedEnum under primitives (was containers)

- internal typedef as 'value_type' for some consistency with STL conventions

- less clutter and typing to use the default template parameter when
  the key is 'word' anyhow.

- use EdgeMap instead of the longhand HashTable version where
  appropriate

Mark Olesen authored May 18, 2017 and Andrew Heather committed May 18, 2017

- simplifies organization, includes, linkage etc.

- avoids some duplicate code.