Add @scope decorator

[live1206]

Resolves #964

The scope parameter of @scope decorator is not working as the normal decorator.
For a normal decorator, we need to get the decorator value from state map based on the scope and the current emitter name. If the value hit from the state map with current emitter name, it's a positive case, if not hit, it's a negative case.

@clientName("Renamed", csharp)
model A;

With the normal decorator scope handling, if the decorator is absent it is a negative case. For the case below, we don't need to handle @clientname decorator, it is a negative case.

model A;

But for @scope decorator, when it is absent, it means AllScopes, which is also a positive case. For below two cases, python emitter should include this operation, both of them are positive case.

op func: void

and

@scope("!csharp")
op func: void

For incremental applying, the mechanism should be similar to the normal decorator scope handling.

• for the same scope, the later decorator value wins regardless it's defined with normal scope or scope negation

[azure-sdk]

All changed packages have been documented.

• ✅ @azure-tools/typespec-client-generator-core

Show changes

@azure-tools/typespec-client-generator-core - feature ✏️

Add @scope decorator to define the language scope for operation

[azure-sdk]

You can try these changes here

🛝 Playground	🌐 Website	📚 Next docs