internal static string GenerateMutualSafeRec(GeneratorExecutionContext context, IReadOnlyList <RecursiveMethodInfo> methodInfos)
{
var firstMethodInfo = methodInfos.First();
if (string.IsNullOrEmpty(firstMethodInfo.CodeGenProps.MutualRecursionId))
{
throw new ArgumentException($"Empty {nameof(SafeRecursionCodeGenProps.MutualRecursionId)} in the first methodInfo of {nameof(methodInfos)}.");
}
if (methodInfos.Count == 1)
{
// Warn the user but continue anyway as we should generate a working code anyway if there
// is actually exactly 1 MutualRecursionId. The code will be slower but it should work.
context.ReportConfigurationWarning(firstMethodInfo.MethodSyntax,
$"Suspiciously only one method is found for the mutual recursive group '{firstMethodInfo.CodeGenProps.MutualRecursionId}'");
}
// TODO really check that all GenericParams and ConstraintClauses for all methodInfos are
// the same. If it is not so, the compilation probably will fail anyway but the message will
// not be very user-friendly
foreach (var methodInfo in methodInfos)
{
if ((methodInfo.GenericParams != firstMethodInfo.GenericParams) ||
(methodInfo.ConstraintClauses != firstMethodInfo.ConstraintClauses))
{
// string equality check is not really correct so only generate a warning
context.ReportConfigurationWarning(methodInfo.MethodSyntax,
$"Suspiciously generic methods '{firstMethodInfo.MethodName}' and '{methodInfo.MethodName}' have differently looking generic params"
+ $" '{firstMethodInfo.GenericParams}' '{firstMethodInfo.ConstraintClauses}'"
+ $" != '{methodInfo.GenericParams}' '{methodInfo.ConstraintClauses}'");
}
}
var classSyntax = (ClassDeclarationSyntax)firstMethodInfo.MethodSyntax.Parent;
var classSymbol = firstMethodInfo.MethodSymbol.ContainingType;
var recursionId = firstMethodInfo.CodeGenProps.MutualRecursionId;
var classInfo = new RecursiveCalculatorClassInfo(classSyntax, classSymbol, isMultiSite: true, recursionId,
firstMethodInfo.GenericParams, firstMethodInfo.ConstraintClauses,
paramsStructName: recursionId + RecursiveCalculatorClassInfo.DispatchStructSuffix);
return(new CalculatorClassGenerator(context, classInfo, methodInfos).GenerateAll());
}