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code_writers.h
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3312 lines (2888 loc) · 97.3 KB
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#pragma once
namespace cppwinrt
{
struct finish_with
{
writer& w;
void (*finisher)(writer&);
finish_with(writer& w, void (*finisher)(writer&)) : w(w), finisher(finisher) {}
finish_with(finish_with const&)= delete;
void operator=(finish_with const&) = delete;
~finish_with() { finisher(w); }
};
static void write_nothing(writer&)
{
}
static void write_preamble(writer& w)
{
if (settings.license)
{
w.write(R"(// C++/WinRT v%
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.
)", CPPWINRT_VERSION_STRING);
}
else
{
w.write(R"(// WARNING: Please don't edit this file. It was generated by C++/WinRT v%
)", CPPWINRT_VERSION_STRING);
}
}
static void write_version_assert(writer& w)
{
w.write_root_include("base");
auto format = R"(static_assert(winrt::check_version(CPPWINRT_VERSION, "%"), "Mismatched C++/WinRT headers.");
#define CPPWINRT_VERSION "%"
)";
w.write(format, CPPWINRT_VERSION_STRING, CPPWINRT_VERSION_STRING);
}
static void write_include_guard(writer& w)
{
auto format = R"(#pragma once
)";
w.write(format);
}
static void write_endif(writer& w)
{
auto format = R"(#endif
)";
w.write(format);
}
static void write_close_file_guard(writer& w)
{
write_endif(w);
}
static void write_open_file_guard(writer& w, std::string_view const& file_name, char impl = 0)
{
write_include_guard(w);
std::string mangled_name;
for (auto&& c : file_name)
{
mangled_name += c == '.' ? '_' : c;
}
if (impl)
{
mangled_name += '_';
mangled_name += impl;
}
auto format = R"(#ifndef WINRT_%_H
#define WINRT_%_H
)";
w.write(format, mangled_name, mangled_name);
}
template<typename... Args>
[[nodiscard]] static finish_with wrap_open_file_guard(writer& w, Args&&... args)
{
write_open_file_guard(w, std::forward<Args>(args)...);
return { w, write_close_file_guard };
}
[[nodiscard]] static finish_with wrap_lean_and_mean(writer& w, bool is_lean_and_mean = true)
{
if (is_lean_and_mean)
{
auto format = R"(#ifndef WINRT_LEAN_AND_MEAN
)";
w.write(format);
return { w, write_endif };
}
else
{
return { w, write_nothing };
}
}
static void write_parent_depends(writer& w, cache const& c, std::string_view const& type_namespace)
{
auto pos = type_namespace.rfind('.');
if (pos == std::string::npos)
{
return;
}
auto parent = type_namespace.substr(0, pos);
auto found = c.namespaces().find(parent);
if (found != c.namespaces().end() && has_projected_types(found->second))
{
w.write_root_include(parent);
}
else
{
write_parent_depends(w, c, parent);
}
}
static void write_pch(writer& w)
{
auto format = R"(#include "%"
)";
if (!settings.component_pch.empty())
{
w.write(format, settings.component_pch);
}
}
static void write_close_namespace(writer& w)
{
auto format = R"(}
)";
w.write(format);
}
[[nodiscard]] static finish_with wrap_impl_namespace(writer& w)
{
auto format = R"(namespace winrt::impl
{
)";
w.write(format);
return { w, write_close_namespace };
}
[[nodiscard]] static finish_with wrap_std_namespace(writer& w)
{
w.write(R"(namespace std
{
)");
return { w, write_close_namespace };
}
[[nodiscard]] static finish_with wrap_type_namespace(writer& w, std::string_view const& ns)
{
auto format = R"(WINRT_EXPORT namespace winrt::@
{
)";
w.write(format, ns);
return { w, write_close_namespace };
}
static void write_enum_field(writer& w, Field const& field)
{
auto format = R"( % = %,
)";
if (auto constant = field.Constant())
{
w.write(format, field.Name(), *constant);
}
}
static void write_enum(writer& w, TypeDef const& type)
{
auto format = R"( enum class % : %
{
% };
)";
auto fields = type.FieldList();
w.write(format, type.TypeName(), fields.first.Signature().Type(), bind_each<write_enum_field>(fields));
}
static void write_enum_operators(writer& w, TypeDef const& type)
{
if (!has_attribute(type, "System", "FlagsAttribute"))
{
return;
}
auto name = type.TypeName();
auto format = R"( constexpr auto operator|(% const left, % const right) noexcept
{
return static_cast<%>(impl::to_underlying_type(left) | impl::to_underlying_type(right));
}
constexpr auto operator|=(%& left, % const right) noexcept
{
left = left | right;
return left;
}
constexpr auto operator&(% const left, % const right) noexcept
{
return static_cast<%>(impl::to_underlying_type(left) & impl::to_underlying_type(right));
}
constexpr auto operator&=(%& left, % const right) noexcept
{
left = left & right;
return left;
}
constexpr auto operator~(% const value) noexcept
{
return static_cast<%>(~impl::to_underlying_type(value));
}
constexpr auto operator^^(% const left, % const right) noexcept
{
return static_cast<%>(impl::to_underlying_type(left) ^^ impl::to_underlying_type(right));
}
constexpr auto operator^^=(%& left, % const right) noexcept
{
left = left ^^ right;
return left;
}
)";
w.write(format, name, name, name, name, name, name, name, name, name, name, name, name, name, name, name, name, name);
}
static void write_generic_typenames(writer& w, std::pair<GenericParam, GenericParam> const& params)
{
separator s{ w };
for (auto&& param : params)
{
s();
w.write("typename %", param);
}
}
static void write_generic_asserts(writer& w, std::pair<GenericParam, GenericParam> const& params)
{
for (auto&& param : params)
{
auto format = R"(
static_assert(impl::has_category_v<%>, "% must be WinRT type.");)";
w.write(format, param, param);
}
}
static void write_comma_generic_typenames(writer& w, std::pair<GenericParam, GenericParam> const& params)
{
for (auto&& param : params)
{
w.write(", typename %", param);
}
}
static void write_comma_generic_types(writer& w, std::pair<GenericParam, GenericParam> const& params)
{
for (auto&& param : params)
{
w.write(", %", param);
}
}
static void write_forward(writer& w, TypeDef const& type)
{
type_name type_name(type);
if (get_category(type) == category::enum_type)
{
auto format = R"( enum class % : %;
)";
w.write(format, type_name.name, type.FieldList().first.Signature().Type());
return;
}
if (type_name == "Windows.Foundation.DateTime" ||
type_name == "Windows.Foundation.TimeSpan")
{
// Don't forward declare these since they're not structs.
return;
}
if (type_name.name_space == "Windows.Foundation.Numerics")
{
if (type_name.name == "Matrix3x2" ||
type_name.name == "Matrix4x4" ||
type_name.name == "Plane" ||
type_name.name == "Quaternion" ||
type_name.name == "Vector2" ||
type_name.name == "Vector3" ||
type_name.name == "Vector4")
{
// Don't forward declare these since they're already defined with different names.
return;
}
}
auto generics = type.GenericParam();
if (empty(generics))
{
auto format = R"( struct %;
)";
w.write(format, type_name.name);
return;
}
auto format = R"( template <%> struct __declspec(empty_bases) %;
)";
w.write(format,
bind<write_generic_typenames>(generics),
remove_tick(type_name.name));
}
static void write_guid_value(writer& w, std::vector<FixedArgSig> const& args)
{
using std::get;
w.write_printf("0x%08X,0x%04X,0x%04X,{ 0x%02X,0x%02X,0x%02X,0x%02X,0x%02X,0x%02X,0x%02X,0x%02X }",
get<uint32_t>(get<ElemSig>(args[0].value).value),
get<uint16_t>(get<ElemSig>(args[1].value).value),
get<uint16_t>(get<ElemSig>(args[2].value).value),
get<uint8_t>(get<ElemSig>(args[3].value).value),
get<uint8_t>(get<ElemSig>(args[4].value).value),
get<uint8_t>(get<ElemSig>(args[5].value).value),
get<uint8_t>(get<ElemSig>(args[6].value).value),
get<uint8_t>(get<ElemSig>(args[7].value).value),
get<uint8_t>(get<ElemSig>(args[8].value).value),
get<uint8_t>(get<ElemSig>(args[9].value).value),
get<uint8_t>(get<ElemSig>(args[10].value).value));
}
static void write_guid_comment(writer& w, std::vector<FixedArgSig> const& args)
{
using std::get;
w.write_printf("%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X",
get<uint32_t>(get<ElemSig>(args[0].value).value),
get<uint16_t>(get<ElemSig>(args[1].value).value),
get<uint16_t>(get<ElemSig>(args[2].value).value),
get<uint8_t>(get<ElemSig>(args[3].value).value),
get<uint8_t>(get<ElemSig>(args[4].value).value),
get<uint8_t>(get<ElemSig>(args[5].value).value),
get<uint8_t>(get<ElemSig>(args[6].value).value),
get<uint8_t>(get<ElemSig>(args[7].value).value),
get<uint8_t>(get<ElemSig>(args[8].value).value),
get<uint8_t>(get<ElemSig>(args[9].value).value),
get<uint8_t>(get<ElemSig>(args[10].value).value));
}
static void write_category(writer& w, TypeDef const& type, std::string_view const& category)
{
auto generics = type.GenericParam();
if (empty(generics))
{
auto format = R"( template <> struct category<%>{ using type = %; };
)";
w.write(format, type, category);
}
else
{
auto format = R"( template <%> struct category<%>{ using type = generic_category<%>; };
)";
w.write(format,
bind<write_generic_typenames>(generics),
type,
bind_list(", ", generics));
}
}
static void write_generic_names(writer& w, std::pair<GenericParam, GenericParam> const& params)
{
bool first{ true };
for (auto&& param : params)
{
if (first)
{
first = false;
}
else
{
w.write(R"(, L", ")");
}
w.write(", name_v<%>", param.Name());
}
}
static void write_name(writer& w, TypeDef const& type)
{
type_name type_name(type);
auto generics = type.GenericParam();
if (empty(generics))
{
auto format = R"( template <> inline constexpr auto& name_v<%> = L"%.%";
)";
w.write(format, type, type_name.name_space, type_name.name);
}
else
{
auto format = R"( template <%> inline constexpr auto name_v<%> = zcombine(L"%.%<"%, L">");
)";
w.write(format,
bind<write_generic_typenames>(generics),
type,
type_name.name_space,
type_name.name,
bind<write_generic_names>(generics));
}
}
static void write_guid(writer& w, TypeDef const& type)
{
auto attribute = get_attribute(type, "Windows.Foundation.Metadata", "GuidAttribute");
if (!attribute)
{
throw_invalid("'Windows.Foundation.Metadata.GuidAttribute' attribute for type '", type.TypeNamespace(), ".", type.TypeName(), "' not found");
}
auto generics = type.GenericParam();
auto guid = attribute.Value().FixedArgs();
if (empty(generics))
{
auto format = R"( template <> inline constexpr guid guid_v<%>{ % }; // %
)";
w.write(format,
type,
bind<write_guid_value>(guid),
bind<write_guid_comment>(guid));
}
else
{
auto format = R"( template <%> inline constexpr guid guid_v<%>{ pinterface_guid<%>::value };
template <%> inline constexpr guid generic_guid_v<%>{ % }; // %
)";
w.write(format,
bind<write_generic_typenames>(generics),
type,
type,
bind<write_generic_typenames>(generics),
type,
bind<write_guid_value>(guid),
bind<write_guid_comment>(guid));
}
}
static void write_default_interface(writer& w, TypeDef const& type)
{
if (auto default_interface = get_default_interface(type))
{
auto format = R"( template <> struct default_interface<%>{ using type = %; };
)";
w.write(format, type, default_interface);
}
}
static void write_struct_category(writer& w, TypeDef const& type)
{
auto format = R"( template <> struct category<%>{ using type = struct_category<%>; };
)";
w.write(format, type, bind_list(", ", type.FieldList()));
}
static void write_array_size_name(writer& w, Param const& param)
{
if (w.param_names)
{
w.write(" __%Size", param.Name());
}
}
static void write_abi_arg_in(writer& w, TypeSig const& type)
{
if (std::holds_alternative<GenericTypeIndex>(type.Type()))
{
w.write("arg_in<%>", type);
}
else
{
w.write(type);
}
}
static void write_abi_arg_out(writer& w, TypeSig const& type)
{
if (std::holds_alternative<GenericTypeIndex>(type.Type()))
{
w.write("arg_out<%>", type);
}
else
{
w.write("%*", type);
}
}
static void write_abi_params(writer& w, method_signature const& method_signature)
{
auto abi_guard = w.push_abi_types(true);
separator s{ w };
for (auto&& [param, param_signature] : method_signature.params())
{
s();
if (param_signature->Type().is_szarray())
{
std::string_view format;
if (param.Flags().In())
{
format = "uint32_t%, %";
}
else if (param_signature->ByRef())
{
format = "uint32_t*%, %*";
}
else
{
format = "uint32_t%, %";
}
w.write(format, bind<write_array_size_name>(param), bind<write_abi_arg_out>(param_signature->Type()));
}
else
{
if (param.Flags().In())
{
write_abi_arg_in(w, param_signature->Type());
if (is_const(*param_signature))
{
w.write(" const&");
}
}
else
{
write_abi_arg_out(w, param_signature->Type());
}
}
if (w.param_names)
{
w.write(" %", param.Name());
}
}
if (method_signature.return_signature())
{
s();
auto const& type = method_signature.return_signature().Type();
if (type.is_szarray())
{
w.write("uint32_t* __%Size, %**", method_signature.return_param_name(), type);
}
else
{
write_abi_arg_out(w, type);
}
if (w.param_names)
{
w.write(" %", method_signature.return_param_name());
}
}
}
static void write_abi_args(writer& w, method_signature const& method_signature)
{
separator s{ w };
for (auto&& [param, param_signature] : method_signature.params())
{
s();
auto param_name = param.Name();
TypeDef signature_type;
auto category = get_category(param_signature->Type(), &signature_type);
if (param.Flags().In())
{
switch (category)
{
case param_category::object_type:
case param_category::string_type:
w.write("*(void**)(&%)", param_name);
break;
case param_category::generic_type:
case param_category::struct_type:
w.write("impl::bind_in(%)", param_name);
break;
case param_category::enum_type:
w.write("static_cast<%>(%)", signature_type.FieldList().first.Signature().Type(), param_name);
break;
case param_category::fundamental_type:
w.write(param_name);
break;
case param_category::array_type:
w.write("%.size(), get_abi(%)", param_name, param_name);
break;
}
}
else
{
switch (category)
{
case param_category::fundamental_type:
w.write("&%", param_name);
break;
case param_category::enum_type:
w.write("reinterpret_cast<%*>(&%)", signature_type.FieldList().first.Signature().Type(), param_name);
break;
case param_category::array_type:
if (param_signature->ByRef())
{
w.write("impl::put_size_abi(%), put_abi(%)", param_name, param_name);
}
else
{
w.write("%.size(), put_abi(%)", param_name, param_name);
}
break;
default:
w.write("impl::bind_out(%)", param_name);
break;
}
}
}
if (method_signature.return_signature())
{
s();
auto param_name = method_signature.return_param_name();
TypeDef signature_type;
auto category = get_category(method_signature.return_signature().Type(), &signature_type);
if (category == param_category::array_type)
{
w.write("&%_impl_size, &%", param_name, param_name);
}
else if (category == param_category::struct_type || category == param_category::generic_type)
{
w.write("put_abi(%)", param_name);
}
else if (category == param_category::enum_type)
{
w.write("reinterpret_cast<%*>(&%)", signature_type.FieldList().first.Signature().Type(), param_name);
}
else
{
w.write("&%", param_name);
}
}
}
static void write_fast_interface_abi(writer& w, TypeDef const& default_interface)
{
if (!settings.fastabi)
{
return;
}
auto pair = settings.fastabi_cache.find(default_interface);
if (pair == settings.fastabi_cache.end())
{
return;
}
auto bases = get_bases(pair->second);
std::for_each(bases.rbegin(), bases.rend(), [&](auto&& base)
{
auto format = R"( virtual void* __stdcall base_%() noexcept = 0;
)";
w.write(format, base.TypeName());
});
for (auto&& [name, info] : get_interfaces(w, pair->second))
{
if (info.is_default)
{
continue;
}
if (!info.fastabi)
{
break;
}
auto format = R"( virtual int32_t __stdcall %(%) noexcept = 0;
)";
for (auto&& method : info.type.MethodList())
{
method_signature signature{ method };
w.write(format, get_abi_name(method), bind<write_abi_params>(signature));
}
}
}
static void write_interface_abi(writer& w, TypeDef const& type)
{
auto generics = type.GenericParam();
auto guard{ w.push_generic_params(generics) };
if (empty(generics))
{
auto format = R"( template <> struct abi<%>
{
struct __declspec(novtable) type : inspectable_abi
{
)";
w.write(format, type);
}
else
{
auto format = R"( template <%> struct abi<%>
{
struct __declspec(novtable) type : inspectable_abi
{
)";
w.write(format,
bind<write_generic_typenames>(generics),
type);
}
auto format = R"( virtual int32_t __stdcall %(%) noexcept = 0;
)";
auto abi_guard = w.push_abi_types(true);
for (auto&& method : type.MethodList())
{
try
{
method_signature signature{ method };
w.write(format, get_abi_name(method), bind<write_abi_params>(signature));
}
catch (std::exception const& e)
{
throw_invalid(e.what(),
"\n method: ", get_name(method),
"\n type: ", type.TypeNamespace(), ".", type.TypeName(),
"\n database: ", type.get_database().path());
}
}
write_fast_interface_abi(w, type);
w.write(R"( };
};
)");
}
static void write_delegate_abi(writer& w, TypeDef const& type)
{
auto format = R"( template <%> struct abi<%>
{
struct __declspec(novtable) type : unknown_abi
{
virtual int32_t __stdcall Invoke(%) noexcept = 0;
};
};
)";
auto generics = type.GenericParam();
auto guard{ w.push_generic_params(generics) };
auto method = get_delegate_method(type);
method_signature signature{ method };
w.write(format,
bind<write_generic_typenames>(generics),
type,
bind<write_abi_params>(signature));
}
static void write_field_abi(writer& w, Field const& field)
{
w.write(" % %;\n", get_field_abi(w, field), field.Name());
}
static void write_struct_abi(writer& w, TypeDef const& type)
{
auto abi_guard = w.push_abi_types(true);
auto format = R"( struct struct_%
{
% };
template <> struct abi<@::%>
{
using type = struct_%;
};
)";
type_name type_name(type);
auto impl_name = get_impl_name(type_name.name_space, type_name.name);
w.write(format,
impl_name,
bind_each<write_field_abi>(type.FieldList()),
type_name.name_space, type_name.name,
impl_name);
}
static void write_consume_params(writer& w, method_signature const& signature)
{
separator s{ w };
for (auto&& [param, param_signature] : signature.params())
{
s();
if (param_signature->Type().is_szarray())
{
std::string_view format;
if (param.Flags().In())
{
format = "array_view<% const>";
}
else if (param_signature->ByRef())
{
format = "com_array<%>&";
}
else
{
format = "array_view<%>";
}
w.write(format, param_signature->Type().Type());
}
else
{
if (param.Flags().In())
{
assert(!param.Flags().Out());
w.consume_types = true;
auto param_type = std::get_if<ElementType>(¶m_signature->Type().Type());
if (param_type && *param_type != ElementType::String && *param_type != ElementType::Object)
{
w.write("%", param_signature->Type());
}
else if (std::holds_alternative<GenericTypeIndex>(param_signature->Type().Type()))
{
w.write("impl::param_type<%> const&", param_signature->Type());
}
else
{
w.write("% const&", param_signature->Type());
}
w.consume_types = false;
}
else
{
assert(!param.Flags().In());
assert(param.Flags().Out());
w.write("%&", param_signature->Type());
}
}
w.write(" %", param.Name());
}
}
static void write_implementation_params(writer& w, method_signature const& method_signature)
{
separator s{ w };
for (auto&& [param, param_signature] : method_signature.params())
{
s();
if (param_signature->Type().is_szarray())
{
std::string_view format;
if (param.Flags().In())
{
format = "array_view<% const>";
}
else if (param_signature->ByRef())
{
format = "com_array<%>&";
}
else
{
format = "array_view<%>";
}
w.write(format, param_signature->Type().Type());
}
else
{
if (param.Flags().In())
{
assert(!param.Flags().Out());
auto param_type = std::get_if<ElementType>(¶m_signature->Type().Type());
if ((!is_put_overload(method_signature.method()) && w.async_types) ||
(param_type && *param_type != ElementType::String && *param_type != ElementType::Object))
{
w.write("%", param_signature->Type());
}
else
{
w.write("% const&", param_signature->Type());
}
}
else
{
assert(!param.Flags().In());
assert(param.Flags().Out());
w.write("%&", param_signature->Type());
}
}
w.write(" %", param.Name());
}
}
static void write_consume_declaration(writer& w, MethodDef const& method)
{
method_signature signature{ method };
auto async_types_guard = w.push_async_types(signature.is_async());
auto method_name = get_name(method);
auto type = method.Parent();
w.write(" %WINRT_IMPL_AUTO(%) %(%) const%;\n",
is_get_overload(method) ? "[[nodiscard]] " : "",
signature.return_signature(),
method_name,
bind<write_consume_params>(signature),
is_noexcept(method) ? " noexcept" : "");
if (is_add_overload(method))
{
auto format = R"( using %_revoker = impl::event_revoker<%, &impl::abi_t<%>::remove_%>;
[[nodiscard]] %_revoker %(auto_revoke_t, %) const;
)";
w.write(format,
method_name,
type,