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.
The const_cast in Deck::get*UnitSystem are potentially undefined
behaviour under a series of (plausible) conditions, and are deprecated
in favour of mutable members. Removes initUnitSystem from the public
interface, as the initialisation is handled on the first getUnitSystem
anyway, cleaning up the Deck interface slightly.
Adds proper constness to the use of unit systems that don't actually
modify the internal state in any way.
The accumulated strings are moved into RawRecords, which reduces
execution time (rough measurements indicates 4-8%). To facilitate this,
RawRecords are stored directly in the vector in favour of via
shared_ptrs.
Since the Deck* family of classes have changed their interfaces to no
longer use shared_ptr, a lot of code broke. This patch fixes all
problems in tests, other signatures and accesses to now use the new Deck
interfaces.
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).
