public static void NoArgumentNull()
{
StatementSyntax ToStatement(IParameterSymbol parameter)
{
return(F.IfStatement(
F.ParseExpression($"{nameof(ReferenceEquals)}(null, {parameter.Name})"),
F.ParseStatement($"throw new {typeof(ArgumentNullException).FullName}(\"{parameter.Name}\");")
));
}
CallBinder.StatementSyntax = F.Block(
from parameter in CallBinder.CallerSymbol.Parameters
where !parameter.Type.IsValueType
select ToStatement(parameter)
);
}
private static StatementSyntax MakeThrowSyntax(Location location, ExpressionSyntax condition, string msg, string expr)
{
// message, expression, file, position, width
string file = location.SourceTree.FilePath;
ArgumentSyntax[] argsSyntax =
{
F.Argument(F.LiteralExpression(K.StringLiteralExpression, F.Literal(msg))),
F.Argument(F.LiteralExpression(K.StringLiteralExpression, F.Literal(expr))),
F.Argument(file == null ? F.LiteralExpression(K.NullLiteralExpression) : F.LiteralExpression(K.StringLiteralExpression, F.Literal(file))),
F.Argument(F.LiteralExpression(K.NumericLiteralExpression, F.Literal(location.SourceSpan.Start))),
F.Argument(F.LiteralExpression(K.NumericLiteralExpression, F.Literal(location.SourceSpan.Length)))
};
return(F.IfStatement(
condition,
F.ParseStatement($"throw new {typeof(AssertionException).FullName}({string.Join<ArgumentSyntax>(", ", argsSyntax)});")
));
}
public static BlockSyntax GetInvocationBlockSyntax(string delegateTypeName, string methodName, string parameters,
IEnumerable <IParameterSymbol> outParameters, ITypeSymbol returnType, SemanticModel semanticModel)
{
var voidType = semanticModel.Compilation.GetTypeByMetadataName("System.Void");
bool returnsVoid = returnType.Equals(voidType);
var statements = new List <StatementSyntax>();
string returnStatement = returnsVoid ? string.Empty : "return ";
statements.Add(SF.ParseStatement($"{delegateTypeName} del;{System.Environment.NewLine}"));
// Prepare if/else block to determine how uninitialized stubs are handled.
var ifStrictExpression = SF.ParseExpression("MockBehavior == MockBehavior.Strict");
var ifStrictTrueSyntax = SF.Block(SF.ParseStatement($"del = _stubs.GetMethodStub<{delegateTypeName}>(\"{methodName}\");{System.Environment.NewLine}"));
var defaultReturnInvocation = outParameters.Select(p =>
SF.ParseStatement($"{p.Name} = default ({p.Type.GetGenericName()});")).ToList();
if (!returnsVoid)
{
defaultReturnInvocation.Add(SF.ParseStatement(GetDefaultReturnInvocationStatement(returnType, semanticModel)));
}
else
{
defaultReturnInvocation.Add(SF.ParseStatement($"return;{System.Environment.NewLine}"));
}
var ifTryGetMethodStubExpression = SF.ParseExpression($"!_stubs.TryGetMethodStub<{delegateTypeName}>(\"{methodName}\", out del)");
var ifStrictFalseSyntax = SF.Block(SF.IfStatement(ifTryGetMethodStubExpression, SF.Block(defaultReturnInvocation)));
statements.Add(SF.IfStatement(ifStrictExpression, ifStrictTrueSyntax, SF.ElseClause(ifStrictFalseSyntax)));
// Add default invocation.
statements.Add(SF.ParseStatement($"{returnStatement}del.Invoke({parameters});{System.Environment.NewLine}"));
return(SF.Block(statements.ToArray()));
}