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971 linhas
26 KiB
971 linhas
26 KiB
================================================================================
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Reflection operator
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================================================================================
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static_assert(std::meta::is_type(^^int()));
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static_assert(std::meta::is_namespace(^^::));
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template<bool> struct X {};
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consteval bool operator<(std::meta::info, X<false>) { return false; }
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consteval void g(std::meta::info r, X<false> xv) {
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r == (^^int) && true;
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(^^X) < xv;
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^^X<true> < xv;
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}
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constexpr std::meta::info r1 = ^^A;
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constexpr std::meta::info r2 = ^^B::C;
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template <typename T> void fn() requires (^^T == ^^int);
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constexpr std::meta::info a = ^^fn<char>;
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constexpr std::meta::info b = ^^std::vector;
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template <typename T>
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struct S {
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static constexpr std::meta::info r = ^^T;
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using type = T;
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};
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static_assert(S<int>::r == ^^int);
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static_assert(^^S<int>::type != ^^int);
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constexpr T obj{.r=^^::};
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constexpr std::meta::info yeti = ^^void(int) const &;
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add_member(^^char const *);
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--------------------------------------------------------------------------------
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(translation_unit
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(static_assert_declaration
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(call_expression
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(qualified_identifier
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(namespace_identifier)
|
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(qualified_identifier
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(namespace_identifier)
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(identifier)))
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(argument_list
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(reflect_expression
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(call_expression
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(primitive_type)
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(argument_list))))))
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(static_assert_declaration
|
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(call_expression
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(qualified_identifier
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(namespace_identifier)
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(qualified_identifier
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(namespace_identifier)
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(identifier)))
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(argument_list
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(reflect_expression))))
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(template_declaration
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(template_parameter_list
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(parameter_declaration
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(primitive_type)))
|
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(struct_specifier
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(type_identifier)
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(field_declaration_list)))
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(function_definition
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(type_qualifier)
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(primitive_type)
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(function_declarator
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(operator_name)
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(parameter_list
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(parameter_declaration
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(qualified_identifier
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(namespace_identifier)
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(qualified_identifier
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(namespace_identifier)
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(type_identifier))))
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(parameter_declaration
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(template_type
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(type_identifier)
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(template_argument_list
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(false))))))
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(compound_statement
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(return_statement
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(false))))
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(function_definition
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(type_qualifier)
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(primitive_type)
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(function_declarator
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(identifier)
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(parameter_list
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(parameter_declaration
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(qualified_identifier
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(namespace_identifier)
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(qualified_identifier
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(namespace_identifier)
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(type_identifier)))
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(identifier))
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(parameter_declaration
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(template_type
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(type_identifier)
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(template_argument_list
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(false)))
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(identifier))))
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(compound_statement
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(expression_statement
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(binary_expression
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(binary_expression
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(identifier)
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(parenthesized_expression
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(reflect_expression
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(type_descriptor
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(primitive_type)))))
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(true)))
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(expression_statement
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(binary_expression
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(parenthesized_expression
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(reflect_expression
|
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(identifier)))
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(identifier)))
|
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(expression_statement
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(binary_expression
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(reflect_expression
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(type_descriptor
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(template_type
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(type_identifier)
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(template_argument_list
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(true)))))
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(identifier)))))
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(declaration
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(type_qualifier)
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(qualified_identifier
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(namespace_identifier)
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(qualified_identifier
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(namespace_identifier)
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(type_identifier)))
|
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(init_declarator
|
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(identifier)
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(reflect_expression
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(identifier))))
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(declaration
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(type_qualifier)
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(qualified_identifier
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(namespace_identifier)
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(qualified_identifier
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(namespace_identifier)
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(type_identifier)))
|
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(init_declarator
|
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(identifier)
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(reflect_expression
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(type_descriptor
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(qualified_identifier
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(namespace_identifier)
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(type_identifier))))))
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(template_declaration
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(template_parameter_list
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(type_parameter_declaration
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(type_identifier)))
|
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(declaration
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(primitive_type)
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(function_declarator
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(identifier)
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(parameter_list)
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(requires_clause
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(binary_expression
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(reflect_expression
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(type_descriptor
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(type_identifier)))
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(reflect_expression
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(type_descriptor
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(primitive_type))))))))
|
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(declaration
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(type_qualifier)
|
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(qualified_identifier
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(namespace_identifier)
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(qualified_identifier
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(namespace_identifier)
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(type_identifier)))
|
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(init_declarator
|
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(identifier)
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(reflect_expression
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(template_function
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(identifier)
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(template_argument_list
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(type_descriptor
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(primitive_type)))))))
|
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(declaration
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(type_qualifier)
|
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(qualified_identifier
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(namespace_identifier)
|
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(qualified_identifier
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(namespace_identifier)
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(type_identifier)))
|
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(init_declarator
|
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(identifier)
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(reflect_expression
|
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(type_descriptor
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(qualified_identifier
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(namespace_identifier)
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(type_identifier))))))
|
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(template_declaration
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(template_parameter_list
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(type_parameter_declaration
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(type_identifier)))
|
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(struct_specifier
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(type_identifier)
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(field_declaration_list
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(field_declaration
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(storage_class_specifier)
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(type_qualifier)
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(qualified_identifier
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(namespace_identifier)
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(qualified_identifier
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(namespace_identifier)
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(type_identifier)))
|
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(field_identifier)
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(reflect_expression
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(identifier)))
|
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(alias_declaration
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(type_identifier)
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(type_descriptor
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(type_identifier))))))
|
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(static_assert_declaration
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(binary_expression
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(qualified_identifier
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(template_type
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(type_identifier)
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(template_argument_list
|
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(type_descriptor
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(primitive_type))))
|
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(identifier))
|
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(reflect_expression
|
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(type_descriptor
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(primitive_type)))))
|
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(static_assert_declaration
|
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(binary_expression
|
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(reflect_expression
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(type_descriptor
|
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(qualified_identifier
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(template_type
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(type_identifier)
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(template_argument_list
|
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(type_descriptor
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(primitive_type))))
|
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(type_identifier))))
|
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(reflect_expression
|
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(type_descriptor
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(primitive_type)))))
|
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(declaration
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(type_qualifier)
|
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(type_identifier)
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(init_declarator
|
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(identifier)
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(initializer_list
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(initializer_pair
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(field_designator
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(field_identifier))
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(reflect_expression)))))
|
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(declaration
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(type_qualifier)
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(qualified_identifier
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(namespace_identifier)
|
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(qualified_identifier
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(namespace_identifier)
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(type_identifier)))
|
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(init_declarator
|
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(identifier)
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(reflect_expression
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(type_descriptor
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(primitive_type)
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(abstract_function_declarator
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(parameter_list
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(parameter_declaration
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(primitive_type)))
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(type_qualifier)
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(ref_qualifier))))))
|
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(expression_statement
|
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(call_expression
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(identifier)
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(argument_list
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(reflect_expression
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(type_descriptor
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(primitive_type)
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(type_qualifier)
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(abstract_pointer_declarator)))))))
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================================================================================
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Splice type specifiers and requirements
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================================================================================
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using alias = [:^^TCls:]<([:^^v:])>;
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using enum [:^^Enum:];
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using namespace [:^^:::];
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namespace global = [:^^:::];
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int o1 = [:^^S::x:];
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auto o2 = typename [:^^TCls:]<([:^^v:])>();
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int S::*k = &[:^^S::m:];
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int v1 = [:^^TCls<1>:]::s;
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int v2 = template [:^^TCls:]<2>::s;
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typename [:^^TCls:]<3>::type v3 = 3;
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template [:^^TCls:]<3>::type v4 = 4;
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typename template [:^^TCls:]<3>::type v5 = 5;
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template <typename T>
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concept C = requires {
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typename [:T::r1:];
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typename [:T::r2:]<int>;
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};
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--------------------------------------------------------------------------------
|
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|
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(translation_unit
|
|
(alias_declaration
|
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(type_identifier)
|
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(type_descriptor
|
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(splice_type_specifier
|
|
(splice_specifier
|
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(reflect_expression
|
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(identifier)))
|
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(template_argument_list
|
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(parenthesized_expression
|
|
(splice_expression
|
|
(splice_specifier
|
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(reflect_expression
|
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(identifier)))))))))
|
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(using_declaration
|
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(splice_type_specifier
|
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(splice_specifier
|
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(reflect_expression
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(identifier)))))
|
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(using_declaration
|
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(splice_type_specifier
|
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(splice_specifier
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(reflect_expression))))
|
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(namespace_alias_definition
|
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(namespace_identifier)
|
|
(splice_specifier
|
|
(reflect_expression)))
|
|
(declaration
|
|
(primitive_type)
|
|
(init_declarator
|
|
(identifier)
|
|
(splice_expression
|
|
(splice_specifier
|
|
(reflect_expression
|
|
(type_descriptor
|
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(qualified_identifier
|
|
(namespace_identifier)
|
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(type_identifier))))))))
|
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(declaration
|
|
(placeholder_type_specifier
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(auto))
|
|
(init_declarator
|
|
(identifier)
|
|
(call_expression
|
|
(splice_type_specifier
|
|
(splice_specifier
|
|
(reflect_expression
|
|
(identifier)))
|
|
(template_argument_list
|
|
(parenthesized_expression
|
|
(splice_expression
|
|
(splice_specifier
|
|
(reflect_expression
|
|
(identifier)))))))
|
|
(argument_list))))
|
|
(declaration
|
|
(primitive_type)
|
|
(init_declarator
|
|
(qualified_identifier
|
|
(namespace_identifier)
|
|
(pointer_type_declarator
|
|
(type_identifier)))
|
|
(pointer_expression
|
|
(splice_expression
|
|
(splice_specifier
|
|
(reflect_expression
|
|
(type_descriptor
|
|
(qualified_identifier
|
|
(namespace_identifier)
|
|
(type_identifier)))))))))
|
|
(declaration
|
|
(primitive_type)
|
|
(init_declarator
|
|
(identifier)
|
|
(qualified_identifier
|
|
(splice_type_specifier
|
|
(splice_specifier
|
|
(reflect_expression
|
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(template_function
|
|
(identifier)
|
|
(template_argument_list
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(number_literal))))))
|
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(identifier))))
|
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(declaration
|
|
(primitive_type)
|
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(init_declarator
|
|
(identifier)
|
|
(qualified_identifier
|
|
(splice_expression
|
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(splice_specifier
|
|
(reflect_expression
|
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(identifier)))
|
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(template_argument_list
|
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(number_literal)))
|
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(identifier))))
|
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(declaration
|
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(dependent_type
|
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(qualified_identifier
|
|
(splice_type_specifier
|
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(splice_specifier
|
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(reflect_expression
|
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(identifier)))
|
|
(template_argument_list
|
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(number_literal)))
|
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(type_identifier)))
|
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(init_declarator
|
|
(identifier)
|
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(number_literal)))
|
|
(declaration
|
|
(qualified_identifier
|
|
(splice_expression
|
|
(splice_specifier
|
|
(reflect_expression
|
|
(identifier)))
|
|
(template_argument_list
|
|
(number_literal)))
|
|
(type_identifier))
|
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(init_declarator
|
|
(identifier)
|
|
(number_literal)))
|
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(declaration
|
|
(dependent_type
|
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(qualified_identifier
|
|
(splice_expression
|
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(splice_specifier
|
|
(reflect_expression
|
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(identifier)))
|
|
(template_argument_list
|
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(number_literal)))
|
|
(type_identifier)))
|
|
(init_declarator
|
|
(identifier)
|
|
(number_literal)))
|
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(template_declaration
|
|
(template_parameter_list
|
|
(type_parameter_declaration
|
|
(type_identifier)))
|
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(concept_definition
|
|
(identifier)
|
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(requires_expression
|
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(requirement_seq
|
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(type_requirement
|
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(splice_type_specifier
|
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(splice_specifier
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(qualified_identifier
|
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(namespace_identifier)
|
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(identifier)))))
|
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(simple_requirement)
|
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(type_requirement
|
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(splice_type_specifier
|
|
(splice_specifier
|
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(qualified_identifier
|
|
(namespace_identifier)
|
|
(identifier)))
|
|
(template_argument_list
|
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(type_descriptor
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(primitive_type)))))
|
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(simple_requirement))))))
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|
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================================================================================
|
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Splice expressions
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================================================================================
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constexpr int c = [:^^S:]::a;
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constexpr int d = template [:^^TCls:]<int>::b;
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template <auto V> constexpr int e = [:V:];
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constexpr int f = template [:^^e:]<^^S::a>;
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constexpr auto g = typename [:^^int:](42);
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constexpr auto h = typename [:^^int:]{42};
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constexpr auto j = e<([:^^h:])>;
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[:^^A::f:](3, 4);
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T* p4 = template [:r:]<200>();
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S<[:r:] + 1> s3;
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|
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template <auto T, auto NS>
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void fn() {
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using a = [:T:]<1>;
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static_assert([:NS:]::template TCls<1>::v == a::v);
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}
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fn<^^N::TCls, ^^N>();
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|
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int v1 = base_.[:fields[I]:];
|
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int v2 = base_->[:fields[I]:];
|
|
|
|
--------------------------------------------------------------------------------
|
|
|
|
(translation_unit
|
|
(declaration
|
|
(type_qualifier)
|
|
(primitive_type)
|
|
(init_declarator
|
|
(identifier)
|
|
(qualified_identifier
|
|
(splice_type_specifier
|
|
(splice_specifier
|
|
(reflect_expression
|
|
(identifier))))
|
|
(identifier))))
|
|
(declaration
|
|
(type_qualifier)
|
|
(primitive_type)
|
|
(init_declarator
|
|
(identifier)
|
|
(qualified_identifier
|
|
(splice_expression
|
|
(splice_specifier
|
|
(reflect_expression
|
|
(identifier)))
|
|
(template_argument_list
|
|
(type_descriptor
|
|
(primitive_type))))
|
|
(identifier))))
|
|
(template_declaration
|
|
(template_parameter_list
|
|
(parameter_declaration
|
|
(placeholder_type_specifier
|
|
(auto))
|
|
(identifier)))
|
|
(declaration
|
|
(type_qualifier)
|
|
(primitive_type)
|
|
(init_declarator
|
|
(identifier)
|
|
(splice_expression
|
|
(splice_specifier
|
|
(identifier))))))
|
|
(declaration
|
|
(type_qualifier)
|
|
(primitive_type)
|
|
(init_declarator
|
|
(identifier)
|
|
(splice_expression
|
|
(splice_specifier
|
|
(reflect_expression
|
|
(identifier)))
|
|
(template_argument_list
|
|
(reflect_expression
|
|
(type_descriptor
|
|
(qualified_identifier
|
|
(namespace_identifier)
|
|
(type_identifier))))))))
|
|
(declaration
|
|
(type_qualifier)
|
|
(placeholder_type_specifier
|
|
(auto))
|
|
(init_declarator
|
|
(identifier)
|
|
(call_expression
|
|
(splice_type_specifier
|
|
(splice_specifier
|
|
(reflect_expression
|
|
(type_descriptor
|
|
(primitive_type)))))
|
|
(argument_list
|
|
(number_literal)))))
|
|
(declaration
|
|
(type_qualifier)
|
|
(placeholder_type_specifier
|
|
(auto))
|
|
(init_declarator
|
|
(identifier)
|
|
(compound_literal_expression
|
|
(splice_type_specifier
|
|
(splice_specifier
|
|
(reflect_expression
|
|
(type_descriptor
|
|
(primitive_type)))))
|
|
(initializer_list
|
|
(number_literal)))))
|
|
(declaration
|
|
(type_qualifier)
|
|
(placeholder_type_specifier
|
|
(auto))
|
|
(init_declarator
|
|
(identifier)
|
|
(template_function
|
|
(identifier)
|
|
(template_argument_list
|
|
(parenthesized_expression
|
|
(splice_expression
|
|
(splice_specifier
|
|
(reflect_expression
|
|
(identifier)))))))))
|
|
(expression_statement
|
|
(call_expression
|
|
(splice_expression
|
|
(splice_specifier
|
|
(reflect_expression
|
|
(type_descriptor
|
|
(qualified_identifier
|
|
(namespace_identifier)
|
|
(type_identifier))))))
|
|
(argument_list
|
|
(number_literal)
|
|
(number_literal))))
|
|
(declaration
|
|
(type_identifier)
|
|
(init_declarator
|
|
(pointer_declarator
|
|
(identifier))
|
|
(call_expression
|
|
(splice_expression
|
|
(splice_specifier
|
|
(identifier))
|
|
(template_argument_list
|
|
(number_literal)))
|
|
(argument_list))))
|
|
(declaration
|
|
(template_type
|
|
(type_identifier)
|
|
(template_argument_list
|
|
(binary_expression
|
|
(splice_expression
|
|
(splice_specifier
|
|
(identifier)))
|
|
(number_literal))))
|
|
(identifier))
|
|
(template_declaration
|
|
(template_parameter_list
|
|
(parameter_declaration
|
|
(placeholder_type_specifier
|
|
(auto))
|
|
(identifier))
|
|
(parameter_declaration
|
|
(placeholder_type_specifier
|
|
(auto))
|
|
(identifier)))
|
|
(function_definition
|
|
(primitive_type)
|
|
(function_declarator
|
|
(identifier)
|
|
(parameter_list))
|
|
(compound_statement
|
|
(alias_declaration
|
|
(type_identifier)
|
|
(type_descriptor
|
|
(splice_type_specifier
|
|
(splice_specifier
|
|
(identifier))
|
|
(template_argument_list
|
|
(number_literal)))))
|
|
(static_assert_declaration
|
|
(binary_expression
|
|
(binary_expression
|
|
(binary_expression
|
|
(qualified_identifier
|
|
(splice_type_specifier
|
|
(splice_specifier
|
|
(identifier)))
|
|
(identifier))
|
|
(number_literal))
|
|
(qualified_identifier
|
|
(identifier)))
|
|
(qualified_identifier
|
|
(namespace_identifier)
|
|
(identifier)))))))
|
|
(expression_statement
|
|
(call_expression
|
|
(template_function
|
|
(identifier)
|
|
(template_argument_list
|
|
(reflect_expression
|
|
(type_descriptor
|
|
(qualified_identifier
|
|
(namespace_identifier)
|
|
(type_identifier))))
|
|
(reflect_expression
|
|
(identifier))))
|
|
(argument_list)))
|
|
(declaration
|
|
(primitive_type)
|
|
(init_declarator
|
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(identifier)
|
|
(field_expression
|
|
(identifier)
|
|
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|
|
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|
|
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|
|
(identifier)
|
|
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|
|
(identifier))))))))
|
|
(declaration
|
|
(primitive_type)
|
|
(init_declarator
|
|
(identifier)
|
|
(field_expression
|
|
(identifier)
|
|
(splice_expression
|
|
(splice_specifier
|
|
(subscript_expression
|
|
(identifier)
|
|
(subscript_argument_list
|
|
(identifier)))))))))
|
|
|
|
================================================================================
|
|
Consteval blocks
|
|
================================================================================
|
|
class A {
|
|
struct A;
|
|
consteval {
|
|
std::meta::define_aggregate(^^S, {});
|
|
return;
|
|
}
|
|
};
|
|
|
|
template <std::meta::info R> consteval void tfn2() {
|
|
consteval { std::meta::define_aggregate(R, {}); }
|
|
}
|
|
|
|
template <typename> struct TCls {
|
|
static constexpr void sfn() requires ([] {
|
|
struct S4;
|
|
consteval { std::meta::define_aggregate(^^S4, {}); }
|
|
return true;
|
|
}()) { }
|
|
};
|
|
|
|
consteval { TCls<void>::sfn(); }
|
|
|
|
--------------------------------------------------------------------------------
|
|
|
|
(translation_unit
|
|
(class_specifier
|
|
(type_identifier)
|
|
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|
|
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|
|
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|
|
(compound_statement
|
|
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|
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|
|
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|
|
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|
|
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|
|
(namespace_identifier)
|
|
(identifier)))
|
|
(argument_list
|
|
(reflect_expression
|
|
(identifier))
|
|
(initializer_list))))
|
|
(return_statement)))))
|
|
(template_declaration
|
|
(template_parameter_list
|
|
(parameter_declaration
|
|
(qualified_identifier
|
|
(namespace_identifier)
|
|
(qualified_identifier
|
|
(namespace_identifier)
|
|
(type_identifier)))
|
|
(identifier)))
|
|
(function_definition
|
|
(type_qualifier)
|
|
(primitive_type)
|
|
(function_declarator
|
|
(identifier)
|
|
(parameter_list))
|
|
(compound_statement
|
|
(consteval_block_declaration
|
|
(compound_statement
|
|
(expression_statement
|
|
(call_expression
|
|
(qualified_identifier
|
|
(namespace_identifier)
|
|
(qualified_identifier
|
|
(namespace_identifier)
|
|
(identifier)))
|
|
(argument_list
|
|
(identifier)
|
|
(initializer_list)))))))))
|
|
(template_declaration
|
|
(template_parameter_list
|
|
(type_parameter_declaration))
|
|
(struct_specifier
|
|
(type_identifier)
|
|
(field_declaration_list
|
|
(function_definition
|
|
(storage_class_specifier)
|
|
(type_qualifier)
|
|
(primitive_type)
|
|
(function_declarator
|
|
(field_identifier)
|
|
(parameter_list)
|
|
(requires_clause
|
|
(call_expression
|
|
(lambda_expression
|
|
(lambda_capture_specifier)
|
|
(compound_statement
|
|
(struct_specifier
|
|
(type_identifier))
|
|
(consteval_block_declaration
|
|
(compound_statement
|
|
(expression_statement
|
|
(call_expression
|
|
(qualified_identifier
|
|
(namespace_identifier)
|
|
(qualified_identifier
|
|
(namespace_identifier)
|
|
(identifier)))
|
|
(argument_list
|
|
(reflect_expression
|
|
(identifier))
|
|
(initializer_list))))))
|
|
(return_statement
|
|
(true))))
|
|
(argument_list))))
|
|
(compound_statement)))))
|
|
(consteval_block_declaration
|
|
(compound_statement
|
|
(expression_statement
|
|
(call_expression
|
|
(qualified_identifier
|
|
(template_type
|
|
(type_identifier)
|
|
(template_argument_list
|
|
(type_descriptor
|
|
(primitive_type))))
|
|
(identifier))
|
|
(argument_list))))))
|
|
|
|
================================================================================
|
|
Annotations
|
|
================================================================================
|
|
|
|
[[=1]] void f();
|
|
[[=2, =3]] void g();
|
|
void g [[=4]] [[=2]] ();
|
|
|
|
template <class T>
|
|
[[=T::type()]] void f(T t);
|
|
|
|
struct Option { bool value; };
|
|
struct C {
|
|
[[=Option{true}]] int a;
|
|
[[=Option{false}]] int b;
|
|
};
|
|
|
|
--------------------------------------------------------------------------------
|
|
|
|
(translation_unit
|
|
(declaration
|
|
(attribute_declaration
|
|
(annotation
|
|
(number_literal)))
|
|
(primitive_type)
|
|
(function_declarator
|
|
(identifier)
|
|
(parameter_list)))
|
|
(declaration
|
|
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|
|
(annotation
|
|
(number_literal))
|
|
(annotation
|
|
(number_literal)))
|
|
(primitive_type)
|
|
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|
|
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|
|
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|
|
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|
|
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|
|
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|
|
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|
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|
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|
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|
|
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|
|
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|
|
(annotation
|
|
(number_literal))))
|
|
(parameter_list)))
|
|
(template_declaration
|
|
(template_parameter_list
|
|
(type_parameter_declaration
|
|
(type_identifier)))
|
|
(declaration
|
|
(attribute_declaration
|
|
(annotation
|
|
(call_expression
|
|
(qualified_identifier
|
|
(namespace_identifier)
|
|
(identifier))
|
|
(argument_list))))
|
|
(primitive_type)
|
|
(function_declarator
|
|
(identifier)
|
|
(parameter_list
|
|
(parameter_declaration
|
|
(type_identifier)
|
|
(identifier))))))
|
|
(struct_specifier
|
|
(type_identifier)
|
|
(field_declaration_list
|
|
(field_declaration
|
|
(primitive_type)
|
|
(field_identifier))))
|
|
(struct_specifier
|
|
(type_identifier)
|
|
(field_declaration_list
|
|
(field_declaration
|
|
(attribute_declaration
|
|
(annotation
|
|
(compound_literal_expression
|
|
(type_identifier)
|
|
(initializer_list
|
|
(true)))))
|
|
(primitive_type)
|
|
(field_identifier))
|
|
(field_declaration
|
|
(attribute_declaration
|
|
(annotation
|
|
(compound_literal_expression
|
|
(type_identifier)
|
|
(initializer_list
|
|
(false)))))
|
|
(primitive_type)
|
|
(field_identifier)))))
|
|
|
|
================================================================================
|
|
Expansion statements
|
|
================================================================================
|
|
|
|
template for (auto const& c : {Containers...}) {}
|
|
template for (constexpr int I : std::views::iota(0zu, sizeof...(Ts))) {}
|
|
|
|
--------------------------------------------------------------------------------
|
|
|
|
(translation_unit
|
|
(expansion_statement
|
|
(placeholder_type_specifier
|
|
(auto))
|
|
(type_qualifier)
|
|
(reference_declarator
|
|
(identifier))
|
|
(initializer_list
|
|
(parameter_pack_expansion
|
|
(identifier)))
|
|
(compound_statement))
|
|
(expansion_statement
|
|
(type_qualifier)
|
|
(primitive_type)
|
|
(identifier)
|
|
(call_expression
|
|
(qualified_identifier
|
|
(namespace_identifier)
|
|
(qualified_identifier
|
|
(namespace_identifier)
|
|
(identifier)))
|
|
(argument_list
|
|
(number_literal)
|
|
(sizeof_expression
|
|
(identifier))))
|
|
(compound_statement)))
|