Rewrites a good amount of legality APIs pertaining to:
* Legal moves that can be learned
* Evolution chains & cross-generation paths
* Memory validation with forgotten moves
In generation 8, there are 3 separate contexts an entity can exist in: SW/SH, BD/SP, and LA. Not every entity can cross between them, and not every entity from generation 7 can exist in generation 8 (Gogoat, etc). By creating class models representing the restrictions to cross each boundary, we are able to better track and validate data.
The old implementation of validating moves was greedy: it would iterate for all generations and evolutions, and build a full list of every move that can be learned, storing it on the heap. Now, we check one game group at a time to see if the entity can learn a move that hasn't yet been validated. End result is an algorithm that requires 0 allocation, and a smaller/quicker search space.
The old implementation of storing move parses was inefficient; for each move that was parsed, a new object is created and adjusted depending on the parse. Now, move parse results are `struct` and store the move parse contiguously in memory. End result is faster parsing and 0 memory allocation.
* `PersonalTable` objects have been improved with new API methods to check if a species+form can exist in the game.
* `IEncounterTemplate` objects have been improved to indicate the `EntityContext` they originate in (similar to `Generation`).
* Some APIs have been extended to accept `Span<T>` instead of Array/IEnumerable
struct implementing interface is boxed when passed to method that accepts interface (not generic method).
Removes IDexLevel (no other inheritors but EvoCriteria) and uses the primitive the data is stored (array, not IReadOnlyList) for slightly better perf.
* Make EvolutionCriteria struct
8 bytes per object instead of 26
Unify LevelMin/LevelMax to match EncounterTemplate
bubble up precise array type for better iteration
* Inline queue operations, less allocation
* Inline some logic
* Update EvolutionChain.cs
* Improve clarity on duplicate move check
* Search reverse
For a dual stage chain, finds it first iteration rather than second.
For BigEndian we don't have to invert the array access if we just iterate backwards :)
Fix xmldoc for gen1 trades ampersand
Add xmldoc for enc trade classes
No functional change.
hovering would grab ILocation, which didn't use the flexible met location fetch.
Just repoint stuff and have it as a virtual call, since most of these are fixed values, there's no point increasing the size of the classes besides those for gen4.
## Issue
We want to discard-but-remember any slots that aren't a perfect fit, on the off chance that a better one exists later in the search space. If there's no better match, then we gotta go with what we got.
## Example:
Wurmple exists in area `X`, and also has a more rare slot for Silcoon, with the same level for both slots.
* We have a Silcoon that we've leveled up a few times.
Was our Silcoon originally a Wurmple, or was it caught as a Silcoon?
* To be sure, we have to check the EC/PID if the Wurmple wouldn't evolve into Cascoon instead.
* We don't want to wholly reject that Wurmple slot, as maybe the Met Level isn't within Silcoon's slot range.
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Existing implementation would store "deferred" matches in a list; we only need to keep 1 of these matches around (less allocation!). We also want to differentiate between a "good" deferral and a "bad" deferral; I don't think this is necessary but it's currently used by Mystery Gift matching (implemented for the Eeveelution mystery gifts which matter for evolution moves).
The existing logic didn't use inheritance, and instead had static methods being reused across generations. Quite kludgy. Also, the existing logic was a pain to modify the master encounter yield methods, as one generation's quirks had to not impact all other generations that used the method.
---
The new implementation splits out the encounter yielding methods to be separate for each generation / subset. Now, things don't have to check `WasLink` for Gen7 origin, because Pokémon Link wasn't a thing in Gen7.
---
## Future
Maybe refactoring yielders into "GameCores" that expose yielding behaviors / properties, rather than the static logic. As more generations and side-gamegroups get added (thanks LGPE/GO/GameCube), all this switch stuff gets annoying to maintain instead of just overriding/inheritance.
## Conclusion
This shouldn't impact any legality results negatively; if you notice any regressions, report them! This should reduce false flags where we didn't defer-discard an encounter when we should have (wild area mons being confused with raids).
Transporter remaps certain locale specific chars depending on the source ROM's version.
Since VC can trade between languages, there are 2 Spanish in-game trades that have glyphs subject to remapping, if it's transferred from a French game.
If the spanish trade is transferred from a french game, it must match the mutated string.
ty @Lusamine & helpers :D
I think this was a PKHeX issue that went unnoticed; originally, we didn't include the Á and Í chars in the dictionary.
I checked the transporter code:
The app maintains the international & japanese character tables, and depending on the ROM language, it may change a char to the language-specific entry. Refer to Bulbapedia's notes on the char tables for different languages:
https://bulbapedia.bulbagarden.net/wiki/Character_encoding_in_Generation_II
However, none of these char-changes are able to be reached with a legal char.
Á and Í (only accessible from the Spanish in-game trades) and the german 0xC0 && z <= 0xC6 chars are already in the international table. Every single difference in the VC1/VC2 table is an un-enterable char.
tl;dr -- all possible char codes are transferred fine with the VC2 table without extra language logic. We just keep out any inaccessible char (replaced with space).
Gen1: all are Trade1 objects, and all get the values set; just set the value in the object initializer
Gen2: all are Trade2 objects, set the same version
Gen2 all static encounters already have a version marked. Only thing remaining is to set the language.
