Redesign of ParserItem so that its sum type nature no longer mandates
indirection, but rather a tag check on all operations. Because of this,
ParserRecords can now store ParserItems directly, and iterators are no
longer iterators to pointers, but behave like normal vector iterators.
With this commit the generation of built in keywords is completely
changed. The most important changes include:
1) We have autogenerated a class for each keyword in the new
ParserKeywords { ... } namespace.
2) The autogenerated classes derive from ParserKeyword, and the
default constructor will build of a fully initialized
ParserKeyword instance, i.e. the keyword used to parse the EQUIL
keyword can be instantiated as simple as:
ParserKeywords::EQUIL kw;
3) The generated keywords have built in static constants for keyword
and item names, and item default values. That way it should be
possible for the compiler to catch trivial errors like trying to
access the keyword "PoRO"; also the the access to default values
means that properties can be initialized without actually
insantiating a DeckKeyword.
4) Two new classes Generator/KeywordLoader and
Generator/KeywordGenerator have been created, with the help of
these classes the keyword generation code is significantly
simplified.
this is just the result of
```
find -iname "*.[ch]pp" | xargs sed -i "s/ *$//"
find opm/parser/share/keywords -type f | xargs sed -i "s/ *$//"
```
so if it causes conflicts with other patches, the others should get
priority. The rationale behind this patch is that some people tell
their editor to remove white space which leads to larger than
necessary patches...
This is the first of several large commits changing several aspects of
the handling of defaults. The overall main purpose of these changes is
to protect against using non sensible values in the case the values have
not been sensibly specified in the deck. The changes in this commit
include:
1. The "default default" values to be used when an item without an
explicit default are defaulted are removed completely.
2. If a ParserItem is queried for a default value when no default has
been assigned it will raise an exception.
The purpose of this flag is to keep track of whether a keyword is
supposed to have only one element, i.e. scalar, or several. The
defaultApplied method only makes sense in the case of scalar items, this
method will now throw if it is called on a non-scalar item.
