private IEnumerable <SwitchSectionSyntax> BuildSwitchStatements()
{
//Every type that is a child type in the same assembly
foreach (PolymorphicTypeInfo typeInfo in GetPolymorphicChildTypes())
{
yield return(SwitchSection()
.WithLabels
(
SingletonList <SwitchLabelSyntax>
(
CaseSwitchLabel
(
CreateSwitchCase(typeInfo)
)
.WithKeyword
(
Token
(
TriviaList
(
Whitespace(" ")
),
SyntaxKind.CaseKeyword,
TriviaList
(
Space
)
)
)
.WithColonToken
(
Token
(
TriviaList(),
SyntaxKind.ColonToken,
TriviaList
(
CarriageReturnLineFeed
)
)
)
)
)
.WithStatements
(
SingletonList <StatementSyntax>
(
ReturnStatement
(
ObjectCreationExpression
(
CreateChildTypeIdentifier(typeInfo.ChildType)
)
.WithNewKeyword
(
Token
(
TriviaList(),
SyntaxKind.NewKeyword,
TriviaList
(
Space
)
)
)
.WithArgumentList
(
ArgumentList()
)
)
.WithReturnKeyword
(
Token
(
TriviaList
(
Whitespace(" ")
),
SyntaxKind.ReturnKeyword,
TriviaList
(
Space
)
)
)
.WithSemicolonToken
(
Token
(
TriviaList(),
SyntaxKind.SemicolonToken,
TriviaList
(
CarriageReturnLineFeed
)
)
)
)
));
}
if (TypeSymbol.HasAttributeExact <DefaultChildAttribute>())
{
//TODO: We need a way to WARN consumers of the library about this.
//We cannot emit a creation for default child if they're not marked as serializable via the WireDataContract
//This will produce code that dangerously recurrs into a stack overflow since base WireMessage won't be overrided.
ITypeSymbol childTypeSymbol = (ITypeSymbol)TypeSymbol.GetAttributeExact <DefaultChildAttribute>().ConstructorArguments.First().Value;
if (childTypeSymbol.HasAttributeLike <WireDataContractAttribute>())
{
yield return(SwitchSection()
.WithLabels
(
SingletonList <SwitchLabelSyntax>
(
DefaultSwitchLabel()
.WithKeyword
(
Token
(
TriviaList
(
Whitespace(" ")
),
SyntaxKind.DefaultKeyword,
TriviaList()
)
)
.WithColonToken
(
Token
(
TriviaList(),
SyntaxKind.ColonToken,
TriviaList
(
CarriageReturnLineFeed
)
)
)
)
)
.WithStatements
(
SingletonList <StatementSyntax>
(
ReturnStatement
(
ObjectCreationExpression
(
IdentifierName(childTypeSymbol.Name)
)
.WithNewKeyword
(
Token
(
TriviaList(),
SyntaxKind.NewKeyword,
TriviaList
(
Space
)
)
)
.WithArgumentList
(
ArgumentList()
)
)
.WithReturnKeyword
(
Token
(
TriviaList
(
Whitespace(" ")
),
SyntaxKind.ReturnKeyword,
TriviaList
(
Space
)
)
)
.WithSemicolonToken
(
Token
(
TriviaList(),
SyntaxKind.SemicolonToken,
TriviaList
(
CarriageReturnLineFeed
)
)
)
)
));
}
else
{
yield return(EmitNoDefaultChildThrow());
}
}
else
{
yield return(EmitNoDefaultChildThrow());
}
}
public PolymorphicSerializerImplementationCompilationUnitEmitter([NotNull] INamedTypeSymbol typeSymbol, [NotNull] Compilation compilationUnit)
: base(typeSymbol)
{
CompilationUnit = compilationUnit ?? throw new ArgumentNullException(nameof(compilationUnit));
PolymorphicKeySizeType = InternalEnumExtensions.ParseFull <PrimitiveSizeType>(TypeSymbol.GetAttributeExact <WireDataContractAttribute>().ConstructorArguments.First().ToCSharpString(), true);
}