Implement function bodies for lowered @_cdecl thunks #212
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Improve the handling of lowering Swift declarations down to C thunks to more clearly model the mapping between the C parameters and the Swift parameters, and start generating code within the body of these C thunks. Provide tests and fixes for lowering of methods of structs and classes, including mutating methods, as well as inout parameters, direct and indirect returns, and so on.
ktoso
reviewed
Jan 30, 2025
| case .enum, .struct, .protocol: loweringStep = .passIndirectly(parameterName) | ||
| case .actor, .class: | ||
| loweringStep = | ||
| .unsafeCastPointer(.passDirectly(parameterName), swiftType: type) |
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Oh nice, I like this idea of constructing what we need to do like that
ktoso
reviewed
Jan 30, 2025
| /// Produce the `@_cdecl` thunk for this lowered function signature that will | ||
| /// call into the original function. | ||
| @_spi(Testing) | ||
| public func cdeclThunk(cName: String, inputFunction: FunctionDeclSyntax) -> FunctionDeclSyntax { |
ktoso
approved these changes
Jan 30, 2025
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Improve the handling of lowering Swift declarations down to C thunks to more clearly model the mapping between the C parameters and the Swift parameters, and start generating code within the body of these C thunks. Provide tests and fixes for lowering of methods of structs and classes, including mutating methods, as well as inout parameters, direct and indirect returns, and so on.