Module sway_core::declaration_engine
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The DeclarationEngine allows the compiler add a layer of separation between AST nodes and declarations.
As an interface, you can think of the DeclarationEngine as a mapping from DeclarationId to DeclarationWrapper. When a DeclarationWrapper is inserted into the DeclarationEngine, a DeclarationId is generated, which is then used to refer to the declaration.
Monomorphized copies of declarations are added to DeclarationEngine.