Remove the 16-field limitation on the systemparam derive #5965
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Have you checked the compile time perf effects? This generates more code and as such will likely compile slower. If this is indeed the case, maybe only use the new code for >16 fields and use the old tuple code for <=16 fields? |
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Closing in favor of #6867 |
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# Objective
* The `SystemParam` derive internally uses tuples, which means it is constrained by the 16-field limit on `all_tuples`.
* The error message if you exceed this limit is abysmal.
* Supercedes #5965 -- this does the same thing, but is simpler.
## Solution
If any tuples have more than 16 fields, they are folded into tuples of tuples until they are under the 16-field limit.
JoJoJet
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* The `SystemParam` derive internally uses tuples, which means it is constrained by the 16-field limit on `all_tuples`.
* The error message if you exceed this limit is abysmal.
* Supercedes bevyengine#5965 -- this does the same thing, but is simpler.
If any tuples have more than 16 fields, they are folded into tuples of tuples until they are under the 16-field limit.
alradish
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Jan 22, 2023
# Objective
* The `SystemParam` derive internally uses tuples, which means it is constrained by the 16-field limit on `all_tuples`.
* The error message if you exceed this limit is abysmal.
* Supercedes bevyengine#5965 -- this does the same thing, but is simpler.
## Solution
If any tuples have more than 16 fields, they are folded into tuples of tuples until they are under the 16-field limit.
ItsDoot
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Feb 1, 2023
# Objective
* The `SystemParam` derive internally uses tuples, which means it is constrained by the 16-field limit on `all_tuples`.
* The error message if you exceed this limit is abysmal.
* Supercedes bevyengine#5965 -- this does the same thing, but is simpler.
## Solution
If any tuples have more than 16 fields, they are folded into tuples of tuples until they are under the 16-field limit.
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Objective
Since this derive macro can create arbitrary code, it shouldn't be limited by the built-in limit to 16 system-parameters a tuple can have.
Solution
Changelog
The SystemParam derive now supports structs with over 16 fields.