Update mojo sdk to rev bdbb0c7e396fc4044a8b194058d7a7e529715286

third_party/mojo/src/mojo/public/tools/bindings/generators/dart_templates/union_definition.tmpl

Index: third_party/mojo/src/mojo/public/tools/bindings/generators/dart_templates/union_definition.tmpl
diff --git a/third_party/mojo/src/mojo/public/tools/bindings/generators/dart_templates/union_definition.tmpl b/third_party/mojo/src/mojo/public/tools/bindings/generators/dart_templates/union_definition.tmpl
new file mode 100644
index 0000000000000000000000000000000000000000..b4a74207a5d5bfb1ced36c414878dd996935d57e
--- /dev/null
+++ b/third_party/mojo/src/mojo/public/tools/bindings/generators/dart_templates/union_definition.tmpl
@@ -0,0 +1,109 @@
+{#--- Begin #}
+
+{%- import "encoding_macros.tmpl" as encoding_macros %}
+
+{%- macro enum_def(union) %}
+enum {{union|name}}Tag {
+{%-   for field in union.fields %}
+  {{field|tag_name}},
+{%-   endfor %}
+  unknown
+}
+{%- endmacro %}
+
+{%- macro wrapper_def(union) %}
+class {{union|name}}Wrapper extends bindings.Union {
+  static final _tag_to_int = const {
+{%-   for field in union.fields %}
+    {{union|name}}Tag.{{field|tag_name}}: {{field.ordinal}},
+{%-   endfor %}
+  };
+
+  static final _int_to_tag = const {
+{%-   for field in union.fields %}
+    {{field.ordinal}}: {{union|name}}Tag.{{field|tag_name}},
+{%-   endfor %}
+  };
+
+  var _data;
+  {{union|name}}Tag _tag = {{union|name}}Tag.unknown;
+
+  {{union|name}}Tag get tag => _tag;
+
+{%-   for field in union.fields %}
+  {{field.kind|dart_type}} get {{field|name}} {
+    if (_tag != {{union|name}}Tag.{{field|tag_name}}) {
+      throw new bindings.UnsetUnionTagError(_tag, {{union|name}}Tag.{{field|tag_name}});
+    }
+    return _data;
+  }
+
+  set {{field|name}}({{field.kind|dart_type}} value) {
+    _tag = {{union|name}}Tag.{{field|tag_name}};
+    _data = value;
+  }
+{%-   endfor %}
+
+  static {{union|name}}Wrapper decode(bindings.Decoder decoder0, int offset) {
+    int size = decoder0.decodeUint32(offset);
+    if (size == 0) {
+      return null;
+    }
+    {{union|name}}Wrapper result = new {{union|name}}Wrapper();
+
+    // TODO(azani): Handle unknown union member.
+    {{union|name}}Tag tag = _int_to_tag[decoder0.decodeUint32(offset + 4)];
+    switch (tag) {
+{%-   for field in union.fields %}
+      case {{union|name}}Tag.{{field|tag_name}}:
+{%-     if field.kind|is_union_kind %}
+        var decoder1 = decoder0.decodePointer(offset + 8, {{field.kind|is_nullable_kind|dart_true_false}});
+        result.{{field|name}} = {{field.kind|dart_type}}.decode(decoder1, 0);
+{%-     else %}
+        {{encoding_macros.decode('result.' ~ field|name, field.kind, "offset + 8", 0)|indent(8)}}
+{%-     endif %}
+        break;
+{%-   endfor %}
+    }
+
+    return result;
+  }
+
+  void encode(bindings.Encoder encoder0, int offset) {
+    // TODO(azani): Error when trying to encode an unknown member.
+    encoder0.encodeUint32(16, offset);
+    encoder0.encodeUint32(_tag_to_int[_tag], offset + 4);
+    switch (_tag) {
+{%-   for field in union.fields %}
+      case {{union|name}}Tag.{{field|tag_name}}:
+{%-     if field.kind|is_union_kind %}
+        encoder0.encodeNestedUnion({{field|name}}, offset + 8, {{field.kind|is_nullable_kind|dart_true_false}});
+{%-     else %}
+        {{encoding_macros.encode(field|name, field.kind, "offset + 8", 0)|indent(8)}}
+{%-     endif %}
+        break;
+{%-   endfor %}
+    }
+  }
+
+  String toString() {
+    String result = "{{union|name}}Wrapper(";
+    switch (_tag) {
+{%-   for field in union.fields %}
+      case {{union|name}}Tag.{{field|tag_name}}:
+        result += "{{field|name}}";
+        break;
+{%-   endfor %}
+      default:
+        result += "unknown";
+    }
+    result += ": $_data)"
+  }
+}
+{%- endmacro %}
+
+
+{%- macro union_def(union) %}
+{{enum_def(union)}}
+{{wrapper_def(union)}}
+{%- endmacro %}