Add M_EMPLACE macros to enables generic generation of EMPLACE functions
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Patrick Pelissier committed
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3a53044198
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@@ -1251,6 +1251,17 @@ M_BEGIN_PROTECTED_CODE
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M_IF_EMPTY(arguments)(action if empty, action if not empty) */
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#define M_IF_EMPTY(...) M_IF(M_EMPTY_P(__VA_ARGS__))
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/* Concatene the two preprocessing token.
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* Handle the case where the second argument is empty, in which case
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* it returns the first token.
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*/
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#define M_C_EMPTY(a, b) M_CI_EMPTY(a, b)
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#define M_CI_EMPTY(a, b) M_IF_EMPTY(b)(M_CI_EMPTY_B, M_CI_EMPTY_CAT)(a, b)
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#define M_CI_EMPTY_B(a, b) a
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#define M_CI_EMPTY_CAT(a, b) a ## b
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/* Return 1 if argument is "()" or "(x)"
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* Test if () or (x) can be transformed into a comma,
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* and that there is no (toplevel) comma
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@@ -3895,6 +3906,81 @@ m_core_parse2_enum (const char str[], const char **endptr)
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M_PAIR_2 d (M_PAIR_1 d, M_PAIR_1 a, M_PAIR_2 a)
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/************************************************************/
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/******************* EMPLACE GENERATION ********************/
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/************************************************************/
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/* Expand to the list of emplace type with their variable name
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to use in the function declaration (start with a ,) */
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#define M_EMPLACE_LIST_TYPE_VAR(prefix, emplace_type) \
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M_IF(M_PARENTHESIS_P( emplace_type ))(M_EMPLACE_LIST_TYPE_VAR_MULTI, M_EMPLACE_LIST_TYPE_VAR_SINGLE)(prefix, emplace_type)
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#define M_EMPLACE_LIST_TYPE_VAR_MULTI(prefix, emplace_type) \
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M_MAP3(M_EMPLACE_LIST_TYPE_VAR_MULTI_F, prefix, M_ID emplace_type)
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#define M_EMPLACE_LIST_TYPE_VAR_MULTI_F(prefix, num, type) \
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, type M_C(prefix, num)
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#define M_EMPLACE_LIST_TYPE_VAR_SINGLE(prefix, emplace_type) \
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, emplace_type prefix
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/* Expand to the list of variable name based on the the declaration with
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emplace type to use in the INIT_WITH call (start with a ,) */
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#define M_EMPLACE_LIST_VAR(prefix, emplace_type) \
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M_IF(M_PARENTHESIS_P( emplace_type ))(M_EMPLACE_LIST_VAR_MULTI, M_EMPLACE_LIST_VAR_SINGLE)(prefix, emplace_type)
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#define M_EMPLACE_LIST_VAR_MULTI(prefix, emplace_type) \
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, M_MAP2_C( M_C, prefix, M_SEQ(1, M_NARGS emplace_type) )
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#define M_EMPLACE_LIST_VAR_SINGLE(prefix, emplace_type) \
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, prefix
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/* Call either INIT_WITH with the prefixed arguments used for emplace
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or with the user provided init_func */
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#define M_EMPLACE_CALL_FUNC(prefix, init_func, oplist, dest, emplace_type) \
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M_IF(M_KEYWORD_P(INIT_WITH, init_func)) \
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( \
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/* If INIT_FUNC==INIT_WITH, classic use of INIT_WITH operator */ \
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M_CALL_INIT_WITH(oplist, dest M_EMPLACE_LIST_VAR(prefix, emplace_type) ) \
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, \
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/* Use the user provided init_func instead (with API transformation) */ \
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M_APPLY_API(init_func, oplist, dest M_EMPLACE_LIST_VAR(prefix, emplace_type) ) \
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)
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/* Generate one or several definitions for the EMPLACE methods
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using the operator EMPLACE_TYPE to get the suitable user types
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and the user provided macro to expand the function definition.
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The user provided macro prototype is
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macro(name, name_t, function_name, oplist, init_func, exp_emplace_type)
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It is suitable for container with a single type of data within.
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*/
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#define M_EMPLACE_QUEUE_DEF(name, name_t, function_name, oplist, macro) \
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M_IF(M_TEST_METHOD_ALTER_P(EMPLACE_TYPE, oplist)) \
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(M_EMPLACE_QUEUE_DEF_EXPAND, M_EAT) \
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(name, name_t, function_name, oplist, macro, M_GET_EMPLACE_TYPE oplist)
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/* One EMPLACE_TYPE operator is defined ==> Perform the emplace function expansion.
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If the emplace type starts with parenthesis, it is only one with multiple args */
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#define M_EMPLACE_QUEUE_DEF_EXPAND(name, name_t, function_name, oplist, macro, emplace_type) \
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M_IF(M_PARENTHESIS_P(emplace_type)) \
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(M_EMPLACE_QUEUE_DEF_SINGLE_EXPAND, M_EMPLACE_QUEUE_DEF_EXPAND_P2) \
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(name, name_t, function_name, oplist, macro, emplace_type)
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/* Test if it starts with LIST, in which case, multiple emplace methods have to be defined */
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#define M_EMPLACE_QUEUE_DEF_EXPAND_P2(name, name_t, function_name, oplist, macro, emplace_type) \
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M_IF(M_KEYWORD_P(LIST, emplace_type)) \
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(M_EMPLACE_QUEUE_DEF_LIST_EXPAND, M_EMPLACE_QUEUE_DEF_SINGLE_EXPAND) \
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(name, name_t, function_name, oplist, macro, emplace_type)
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/* Define & expand multiple emplace methods */
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#define M_EMPLACE_QUEUE_DEF_LIST_EXPAND(name, name_t, function_name, oplist, macro, emplace_type) \
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M_MAP2(M_EMPLACE_QUEUE_DEF_SUFFIX, (name, name_t, function_name, oplist, macro), M_KEYWORD_TO_VA_ARGS(LIST, emplace_type))
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/* Let the arguments be expanded before calling the definition macro */
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#define M_EMPLACE_QUEUE_DEF_SUFFIX(trio, list) M_EMPLACE_QUEUE_DEF_SUFFIX2(M_ID trio, M_ID list)
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/* Let the arguments be expanded before calling the definition macro */
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#define M_EMPLACE_QUEUE_DEF_SUFFIX2(...) M_EMPLACE_QUEUE_DEF_SUFFIX3(__VA_ARGS__)
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/* Everything is now proprely expanded. Just call the original macro (with a properly expanded emplace type) */
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#define M_EMPLACE_QUEUE_DEF_SUFFIX3(name, name_t, function_name, oplist, macro, sup_suffix, init_func, ...) \
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macro(name, name_t, M_C_EMPTY(function_name, sup_suffix), oplist, init_func, (__VA_ARGS__) )
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/* Define & expand one emplace method by using the definition macro */
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#define M_EMPLACE_QUEUE_DEF_SINGLE_EXPAND(name, name_t, function_name, oplist, macro, emplace_type) \
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macro(name, name_t, function_name, oplist, INIT_WITH, emplace_type)
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/************************************************************/
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/******************* Exponential Backoff ********************/
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/************************************************************/
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