Every header is self-contained and includes only what it must to
function, relying on users include what they need in source files,
adopting a pay-what-you-use model (in particular for internal
dependencies).
This is an effort to improve build performance. Several includes
scattered across the project are either unused or partially used (i.e.
just used to import a type name, not depending on the actual contents of
the header file).
Replaces a lot of these includes with forward declarations.
In order to reduce parsing load on clients, the generated ParserKeywords
now come in their own sorted-by-first-letter files, so that inclusion of
the entire tree is unnecessary when only a handful of keywords will do.
This also applies to the generated source code (which is pretty heavy to
compile), which now is split into multiple files to enable parallel
builds.
Done by using the disable_warnings.h and reenable_warnings.h headers.
In some cases also a little reordering of includes, to put all boost
includes in the warning-suppressed part.
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.
