private static bool TryTranslateDefault <T>(ConstantExpression constant, out ITranslation translation)
{
if ((constant.Type != typeof(T)) || !constant.Value.Equals(default(T)))
{
translation = null;
return(false);
}
translation = new TranslationWrapper(FixedValueTranslation(typeof(T).Name, typeof(T))).WrappedWith("default(", ")");
return(true);
}
private static bool TryGetRegexTranslation(ConstantExpression constant, out ITranslation translation)
{
if (constant.Type != typeof(Regex))
{
translation = null;
return(false);
}
translation = FixedValueTranslation(constant);
translation = new TranslationWrapper(translation).WrappedWith("Regex /* ", " */");
return(true);
}
private static bool TryGetTypeTranslation(
ConstantExpression constant,
ITranslationContext context,
out ITranslation translation)
{
if (!constant.Type.IsAssignableTo(typeof(Type)))
{
translation = null;
return(false);
}
translation = context.GetTranslationFor((Type)constant.Value);
translation = new TranslationWrapper(translation).WrappedWith("typeof(", ")");
return(true);
}
private static bool TryTranslateFromTypeCode(
ConstantExpression constant,
ITranslationContext context,
out ITranslation translation)
{
switch ((Nullable.GetUnderlyingType(constant.Type) ?? constant.Type).GetTypeCode())
{
case NetStandardTypeCode.Boolean:
translation = FixedValueTranslation(constant.Value.ToString().ToLowerInvariant(), constant.Type);
return(true);
case NetStandardTypeCode.Char:
var character = (char)constant.Value;
var value = character == '\0' ? Expression.Constant(@"\0") : constant;
translation = new TranslationWrapper(FixedValueTranslation(value)).WrappedWith("'", "'");
return(true);
case NetStandardTypeCode.DateTime:
if (!TryTranslateDefault <DateTime>(constant, out translation))
{
translation = new DateTimeConstantTranslation(constant);
}
return(true);
case NetStandardTypeCode.DBNull:
translation = FixedValueTranslation("DBNull.Value", constant.Type);
return(true);
case NetStandardTypeCode.Decimal:
translation = GetDecimalTranslation(constant);
return(true);
case NetStandardTypeCode.Double:
translation = GetDoubleTranslation(constant);
return(true);
case NetStandardTypeCode.Int64:
translation = new TranslationWrapper(FixedValueTranslation(constant)).WithSuffix("L");
return(true);
case NetStandardTypeCode.Int32:
translation = FixedValueTranslation(constant);
return(true);
case NetStandardTypeCode.Object:
if (TryGetTypeTranslation(constant, context, out translation) ||
LambdaConstantTranslation.TryCreate(constant, context, out translation) ||
TryGetRegexTranslation(constant, out translation) ||
TryTranslateDefault <Guid>(constant, out translation) ||
TimeSpanConstantTranslation.TryCreate(constant, out translation))
{
return(true);
}
break;
case NetStandardTypeCode.Single:
translation = GetFloatTranslation(constant);
return(true);
case NetStandardTypeCode.String:
var stringValue = ((string)constant.Value).Replace("\0", @"\0");
if (stringValue.IsComment())
{
translation = FixedValueTranslation(stringValue, typeof(string), isTerminated: true);
return(true);
}
translation = FixedValueTranslation(stringValue.Replace("\"", "\\\""), typeof(string));
translation = new TranslationWrapper(translation).WrappedWith("\"", "\"");
return(true);
}
translation = null;
return(false);
}
