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[Interop][SwiftToCxx] Emit helper cases class in C++ for Swift enum #59669

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merged 3 commits into from Jun 25, 2022
Merged

[Interop][SwiftToCxx] Emit helper cases class in C++ for Swift enum #59669

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b98bb6a
[Interop][SwiftToCxx] emit helper cases class in C++ for Swift enum
WANGJIEKE Jun 23, 2022
d3cee06
use getNameStr() to retrieve identifier instead
WANGJIEKE Jun 23, 2022
7c962b2
Improve C++ case printing
WANGJIEKE Jun 24, 2022
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16 changes: 14 additions & 2 deletions lib/PrintAsClang/DeclAndTypePrinter.cpp
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Expand Up @@ -392,8 +392,20 @@ class DeclAndTypePrinter::Implementation
ClangValueTypePrinter printer(os, owningPrinter.prologueOS,
owningPrinter.typeMapping,
owningPrinter.interopContext);
printer.printValueTypeDecl(
ED, /*bodyPrinter=*/[&]() {}); // TODO: (tongjie) print cases
printer.printValueTypeDecl(ED, /*bodyPrinter=*/[&]() {
ClangSyntaxPrinter syntaxPrinter(os);
os << " enum class cases {";
llvm::interleaveComma(
ED->getAllCases(), os, [&](const EnumCaseDecl *caseDecl) {
llvm::interleaveComma(caseDecl->getElements(), os,
[&](const EnumElementDecl *elementDecl) {
os << "\n ";
syntaxPrinter.printIdentifier(
elementDecl->getNameStr());
});
});
os << "\n };\n";
});
os << outOfLineDefinitions;
outOfLineDefinitions.clear();
return;
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47 changes: 47 additions & 0 deletions test/Interop/SwiftToCxx/enums/swift-enum-cases-in-cxx.swift
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@@ -0,0 +1,47 @@
// RUN: %empty-directory(%t)
// RUN: %target-swift-frontend %s -typecheck -module-name Enums -clang-header-expose-public-decls -emit-clang-header-path %t/enums.h
// RUN: %FileCheck %s < %t/enums.h

// RUN: %check-interop-cxx-header-in-clang(%t/enums.h -Wno-unused-private-field -Wno-unused-function)

public enum EnumMultipleElementsInSingleCase { case first, second }

public enum EnumSingleElementInSingleCase {
case first
case second
}

public enum EnumCaseIsSwiftKeyword {
case first(a: Int)
case `protocol`(b: Double)
}

public enum EnumCaseIsCxxKeyword {
case first, second(x: Float)
case const
}

// CHECK: class EnumCaseIsCxxKeyword final {
// CHECK: enum class cases {
// CHECK-NEXT: first,
// CHECK-NEXT: second,
// CHECK-NEXT: const_
// CHECK-NEXT: };

// CHECK: class EnumCaseIsSwiftKeyword final {
// CHECK: enum class cases {
// CHECK-NEXT: first,
// CHECK-NEXT: protocol
// CHECK-NEXT: };

// CHECK: class EnumMultipleElementsInSingleCase final {
// CHECK: enum class cases {
// CHECK-NEXT: first,
// CHECK-NEXT: second
// CHECK-NEXT: };

// CHECK: class EnumSingleElementInSingleCase final {
// CHECK: enum class cases {
// CHECK-NEXT: first,
// CHECK-NEXT: second
// CHECK-NEXT: };