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https://issues.apache.org/jira/browse/THRIFT-4290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16157291#comment-16157291
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ASF GitHub Bot commented on THRIFT-4290:
----------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/thrift/pull/1347
> C# nullable option generates invalid code for non-required enum field with
> default value
> ----------------------------------------------------------------------------------------
>
> Key: THRIFT-4290
> URL: https://issues.apache.org/jira/browse/THRIFT-4290
> Project: Thrift
> Issue Type: Bug
> Components: C# - Compiler
> Affects Versions: 0.9.3, 0.10.0
> Environment: Windows
> Reporter: Dirk Sandbrink
> Assignee: James E. King, III
> Priority: Minor
> Fix For: 0.11.0
>
>
> When generating C# code with the nullable option invalid setter code is
> generated for enum fields which have a default value (and thus still need an
> isset flag).
> For example use the Work struct from tutorial.thrift and add a default value
> to the enum field:
> {code:none}
> struct Work {
> 1: i32 num1 = 0,
> 2: i32 num2,
> 3: Operation op = Operation.ADD,
> 4: optional string comment,
> }
> {code}
> Then the generated code in Work.cs looks like this:
> {code:none}
> public Operation? Op
> {
> get
> {
> return _op;
> }
> set
> {
> __isset.op = true;
> this._op = value;
> }
> }
> {code}
> This code is invalid, because value is of type _Operation?_, the correct code
> should be:
> {code:none}
> public Operation? Op
> {
> get
> {
> return _op;
> }
> set
> {
> __isset.op = value.HasValue;
> if (value.HasValue) this._op = value.Value;
> }
> }
> {code}
> I believe the error is located in file t_csharp_generator.cc in function
> t_csharp_generator::generate_csharp_property:
> {code:none}
> if (ttype->is_base_type()) {
> use_nullable = ((t_base_type*)ttype)->get_base() !=
> t_base_type::TYPE_STRING;
> }
> {code}
> Here use_nullable is set to true for all base types other then string, but
> not for enums.
> A quick fix might be to add
> {code:none}
> else if (ttype->is_enum()) {
> use_nullable = true;
> }
> {code}
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