private static bool CheckValueTypeDefaultValueInitializer(EqualsValueClauseSyntax initializer, ITypeSymbol type)
{
if (!type.IsValueType)
{
return(false);
}
switch (type.SpecialType)
{
case SpecialType.System_Boolean:
return(EquivalenceChecker.AreEquivalent(initializer.Value, SyntaxHelper.FalseLiteralExpression));
case SpecialType.System_Decimal:
case SpecialType.System_Double:
case SpecialType.System_Single:
{
double constantValue;
return(ExpressionNumericConverter.TryGetConstantDoubleValue(initializer.Value, out constantValue) &&
Math.Abs(constantValue - default(double)) < double.Epsilon);
}
case SpecialType.System_Char:
case SpecialType.System_Byte:
case SpecialType.System_Int16:
case SpecialType.System_Int32:
case SpecialType.System_Int64:
case SpecialType.System_SByte:
case SpecialType.System_UInt16:
case SpecialType.System_UInt32:
case SpecialType.System_UInt64:
{
int constantValue;
return(ExpressionNumericConverter.TryGetConstantIntValue(initializer.Value, out constantValue) &&
constantValue == default(int));
}
default:
return(false);
}
}
private static bool CheckValueTypeDefaultValueInitializer(VariableDeclaratorSyntax variable, IFieldSymbol variableSymbol)
{
if (!variableSymbol.Type.IsValueType)
{
return(false);
}
switch (variableSymbol.Type.SpecialType)
{
case SpecialType.System_Boolean:
return(EquivalenceChecker.AreEquivalent(variable.Initializer.Value, FalseExpression));
case SpecialType.System_Decimal:
case SpecialType.System_Double:
case SpecialType.System_Single:
{
double constantValue;
return(ExpressionNumericConverter.TryGetConstantDoubleValue(variable.Initializer.Value, out constantValue) &&
Math.Abs(constantValue - default(double)) < double.Epsilon);
}
case SpecialType.System_Char:
case SpecialType.System_Byte:
case SpecialType.System_Int16:
case SpecialType.System_Int32:
case SpecialType.System_Int64:
case SpecialType.System_SByte:
case SpecialType.System_UInt16:
case SpecialType.System_UInt32:
case SpecialType.System_UInt64:
{
int constantValue;
return(ExpressionNumericConverter.TryGetConstantIntValue(variable.Initializer.Value, out constantValue) &&
constantValue == default(int));
}
default:
return(false);
}
}