tools/fidl/fidlgen_llcpp/codegen/fragment_struct.tmpl.go

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

package codegen

const fragmentStructTmpl = `
{{- define "StructForwardDeclaration" }}
struct {{ .Name }};
{{- end }}

{{- define "StructMemberCloseHandles" }}
  {{- if .Type.IsResource }}
    {{- template "TypeCloseHandles" NewTypedArgument .Name .Type .Type.LLPointer false false }}
  {{- else if .Type.ExternalDeclaration }}
  if constexpr ({{ .Type.LLClass }}::IsResource) {
    {{- template "TypeCloseHandles" NewTypedArgument .Name .Type .Type.LLPointer false false }}
  }
  {{- end }}
{{- end }}

{{- define "StructDeclaration" }}

extern "C" const fidl_type_t {{ .TableType }};
{{range .DocComments}}
//{{ . }}
{{- end}}
struct {{ .Name }} {
  static constexpr const fidl_type_t* Type = &{{ .TableType }};
  static constexpr uint32_t MaxNumHandles = {{ .MaxHandles }};
  static constexpr uint32_t PrimarySize = {{ .InlineSize }};
  [[maybe_unused]]
  static constexpr uint32_t MaxOutOfLine = {{ .MaxOutOfLine }};
  static constexpr bool HasPointer = {{ .HasPointer }};
  static constexpr bool IsResource = {{ .IsResource }};

  {{- range .Members }}
{{ "" }}
  {{- range .DocComments }}
  //{{ . }}
  {{- end }}
  {{ .Type.LLDecl }} {{ .Name }} = {};
  {{- end }}
  void _CloseHandles();
};
{{- end }}

{{- define "StructDefinition" }}

void {{ .Name }}::_CloseHandles() {
  {{- range .Members }}
    {{- template "StructMemberCloseHandles" . }}
  {{- end }}
}
{{- end }}

{{- define "StructTraits" }}

template <>
struct IsFidlType<{{ .Namespace }}::{{ .Name }}> : public std::true_type {};
template <>
struct IsStruct<{{ .Namespace }}::{{ .Name }}> : public std::true_type {};
static_assert(std::is_standard_layout_v<{{ .Namespace }}::{{ .Name }}>);
{{- $struct := . }}
{{- range .Members }}
static_assert(offsetof({{ $struct.Namespace }}::{{ $struct.Name }}, {{ .Name }}) == {{ .Offset }});
{{- end }}
static_assert(sizeof({{ .Namespace }}::{{ .Name }}) == {{ .Namespace }}::{{ .Name }}::PrimarySize);
{{- end }}
`