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Union As Accessors for C# (#6251)

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* Union As Accessors for C#

* Changed loop to be compatible with older compilers

* errant change fix
This commit is contained in:
Derek Bailey
2020-11-12 09:28:21 -08:00
committed by GitHub
parent 8778dc7c2b
commit febb9d87c9
3 changed files with 42 additions and 2 deletions
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29
src/idl_gen_csharp.cpp
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@@ -618,8 +618,9 @@ class CSharpGenerator : public BaseGenerator {
std::string dest_mask = "";
std::string dest_cast = DestinationCast(field.value.type);
std::string src_cast = SourceCast(field.value.type);
std::string method_start = " public " + type_name_dest + optional + " " +
MakeCamel(field.name, true);
std::string field_name_camel = MakeCamel(field.name, true);
std::string method_start =
" public " + type_name_dest + optional + " " + field_name_camel;
std::string obj = "(new " + type_name + "())";
// Most field accessors need to retrieve and test the field offset first,
@@ -763,6 +764,30 @@ class CSharpGenerator : public BaseGenerator {
code += offset_prefix + GenGetter(Type(BASE_TYPE_STRING));
code += "(o + __p.bb_pos) : null";
}
// As<> accesors for Unions
// Loop through all the possible union types and generate an As
// accessor that casts to the correct type.
for (auto uit = field.value.type.enum_def->Vals().begin();
uit != field.value.type.enum_def->Vals().end(); ++uit) {
auto val = *uit;
if (val->union_type.base_type == BASE_TYPE_NONE) { continue; }
auto union_field_type_name = GenTypeGet(val->union_type);
code += member_suffix + "}\n";
if (val->union_type.base_type == BASE_TYPE_STRUCT &&
val->union_type.struct_def->attributes.Lookup("private")) {
code += " internal ";
} else {
code += " public ";
}
code += union_field_type_name + " ";
code += field_name_camel + "As" + val->name + "() { return ";
code += field_name_camel;
if (IsString(val->union_type)) {
code += "AsString()";
} else {
code += "<" + union_field_type_name + ">().Value";
}
}
break;
default: FLATBUFFERS_ASSERT(0);
}