C#•16mo ago

❔ How can i remove methods or classes with an Attribute from compiling?

How can i remove methods or classes with an Attribute from compiling?

30 Replies

MrScautHDOP•16mo ago

ok what i need todo?

Angius•16mo ago

That seems like an XY issue tbh

MrScautHDOP•16mo ago

would it not possible with a attribute

Angius•16mo ago

Ah, so trying to fix a fucked up architecture, carry on

MrScautHDOP•16mo ago

is the #if the best way? would it possible to set the #if variable with c# code or just with XNA :/ what is #define doing? eh i not think they can i just like the code style more instead of the #if

Angius•16mo ago

Attributes are something you get on runtime during reflection, or on compile time using source generators You can't arbitrarily exclude code from compilation using them Since reflections cannot do that And source generators can only generate code, not delete or overwrite it So either: a) rethink your architecture b) deal with it

MrScautHDOP•16mo ago

man i just find the best way but yea thx i use the #if thing if it would work with my system @Mathf.Lerp i doing a API so i need to allow other users to disable or enable it and i think you can not overwrite it

Angius•16mo ago

Uh, an API is compiled once, and runs on the server Unless you want the users to be able to recompile it? And remove arbitrary code? Which seems, uh, mental

MrScautHDOP•16mo ago

idk would it not possible to doing any generated file that allow you to set the headless variable to true or false

Angius•16mo ago

With #if you can check for variables in the csproj

MrScautHDOP•16mo ago

yea ik so i need to change it before i compile it

Angius•16mo ago

Or just use simple logic where needed

var user = some_env_var_or_something_idk
    ? new FooUser()
    : new BarUser();

var user = some_env_var_or_something_idk
    ? new FooUser()
    : new BarUser();

MrScautHDOP•16mo ago

oh wait

MrScautHDOP•16mo ago

if i doing now something like that?

MrScautHDOP•16mo ago

can i define it in a project that refernce this?

Angius•16mo ago

https://stackoverflow.com/a/61122781/6042255 ye Well, uh, kinda Weird, I thought you can just easily use csproj variables, but it seems like you need #define after all

MrScautHDOP•16mo ago

if i define that now:

MrScautHDOP•16mo ago

should it not normaly not anymore possbile to call the Input?

MrScautHDOP•16mo ago

Because it still is

MrScautHDOP•16mo ago

mhh i see that would not work

JakenVeina•16mo ago

the closes thing to what you're asking is [Conditional()] which only works because Roslyn is designed to specifically look for it, and change its behavior accordingly

JakenVeina•16mo ago

https://learn.microsoft.com/en-us/dotnet/api/system.diagnostics.conditionalattribute?view=net-7.0

ConditionalAttribute Class (System.Diagnostics)

Indicates to compilers that a method call or attribute should be ignored unless a specified conditional compilation symbol is defined.

JakenVeina•16mo ago

other than that, yes, this very much sounds like an XY problem

MrScautHDOP•16mo ago

Does that really remove it from the compiler or just ingore it?

JakenVeina•16mo ago

not entirely sure

MrScautHDOP•16mo ago

mhh kk but if i want to remove it from the compiler i need to use #if

JakenVeina•16mo ago

in some form, yes

MrScautHDOP•16mo ago

and you guys know no other ways that i can remove it with a attribute

JakenVeina•16mo ago

no there is no such thing attributes do nothing ever if you want things to be excluded from your build, you need to talk to the thing that builds it: the compiler the compiler's support for excluding things from builds includes that attribute I linked to, and pre-processor directives

Accord•16mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ How can i remove methods or classes with an Attribute from compiling?