Add getSymbolsByUDA template #3421
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| import std.typetuple : Filter, staticMap, TypeTuple; | ||
| import std.traits : hasMember; | ||
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| static enum hasSpecificUDA(alias S) = hasUDA!(S, attribute); |
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Nonsense like template instance I!(d) cannot use local 'd' as parameter to non-global template I(alias T)
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LGTM |
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Maybe add a note that this is not recursive? |
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Added. |
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| // Finds both UDA attributes. | ||
| static assert(getSymbolsByUDA!(B, UDA).length == 2); | ||
| // Finds one `100` atribute. |
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Anything holding this up? |
| import std.typetuple : Filter, staticMap, TypeTuple; | ||
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| static enum hasSpecificUDA(alias S) = hasUDA!(S, attribute); | ||
| static alias I(alias T) = T; |
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I think std.traits.Identity already does this. Can you import that one?
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Why does Identity not have a ddoc comment?
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No clue. Probably because it exposes a deficiency in the language that may be fixed in the future?
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Can you import that one?
Hah, I didn't even realize this was std.traits that you were editing :) The edit to remove std.traits import threw me off too!
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nice, LGTM |
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@schveiguy: Fixed |
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Add getSymbolsByUDA template
| int d; | ||
| } | ||
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| // Also checks the symbol itself |
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If foresee that including the symbol itself per default will lead to a lot of devs having to explicitly do an extra check for excluding the symbol from the result. I also think that is the most common case. So I would exclude the symbol itself and let devs explicitly include it if they need it.
This pull request adds the
getSymbolsByUDAtemplate. It is used for getting a(n) Arguments/TypeTuple from a symbol consisting of that symbol or parts of the symbol that have the specified UDA. This functionality is very important for compile-time reflection.