With this change, Transactions and Postings reference each other
co-recursively. This makes constructing them more tedious, but it
may also allow LedgerPostings to be dropped and code to be simplified.
Time and space performance of register and balance is as before.
P directives now work, but differently from current c++ ledger for now.
Each posting amount is assigned a fixed unit price from the price history
when available (unless overridden by @). This is simple and useful for
fixed-rate transactions such as foreign currency expenses.
This renames RawTransaction -> Posting and Entry -> LedgerTransaction,
plus a bunch more cleanups for consistency. So while ledger 3 has
transactions containing postings, and so do we when speaking to users,
internally we call ledger 3's transactions LedgerTransaction, and we keep
our old Transaction type as well, because it's useful and used all over
the place. To review:
- ledger 2 had Entrys containing Transactions.
- hledger 0.4 had Entrys containing RawTransactions, and Transactions
which are a RawTransaction with its parent Entry's info added.
Transactions are what we most work with when reporting and are
ubiquitous in the code and docs.
- ledger 3 has Transactions containing Postings.
- hledger 0.5 now has LedgerTransactions containing Postings, with
Transactions kept as before (a Posting plus it's parent's info). These
could be named PartialTransactions or TransactionPostings, but it gets
too verbose and obscure for devs and users.
Any open sessions in a timelog will be considered clocked out as of the
current time, and included in calculations. Also, contrary to the earlier
patch we now ignore timezone everywhere and deal only with local times.
This might need revisiting eg to track time while crossing timezones.
This patch replaces the strings used in the Entry, TimeLogEntry, and Transaction
records with real types. Rather than use the inbuild system date and time types
directly, two custom types have been implemented that wrap UTCTime: Date and
DateTime. A minimal API for these has been added.
