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
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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
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Jan 30, 2025
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Really cool work here, looking good
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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.