Meta tags:
Headings (most frequently used words):
slurpy, variadic, function, contents, overview, examples, see, also, notes, references, external, links, carbon, fortran, go, java, javascript, lua, pascal, php, python, raku, ruby, rust, scala, swift, tcl, flattened, unflattened, contextual,
Text of the page (most frequently used words):
the (194), variadic (67), arguments (66), with (55), #function (54), and (52), args (42), sum (41), for (35), edit (31), argument (28), functions (26), hello (26), this (25), number (25), type (25), can (25), foo (24), parameter (23), that (23), articles (22), example (22), any (21), array (21), are (21), int (21), string (20), variable (19), return (18), code (16), using (15), from (15), not (15), one (15), pascal (14), print (14), va_list (14), printargs (13), each (13), may (12), all (12), wikipedia (11), rust (11), language (11), retrieved (11), parameters (11), also (11), have (11), main (11), types (11), end (11), used (11), numbers (11), examples (10), optional (10), good (10), morning (10), will (10), object (10), eval (10), slurpy (10), varargs (10), table (9), java (9), lua (9), like (9), other (9), they (9), which (9), takes (9), nums (9), log (9), console (9), languages (8), last (8), programming (8), reference (8), way (8), list (8), passed (8), more (8), has (8), vector (8), va_start (8), about (7), was (7), carbon (7), com (7), std (7), does (7), zaz (7), two (7), into (7), unpack (7), first (7), void (7), va_end (7), va_arg (7), use (6), page (6), 2026 (6), python (6), links (6), style (6), short (6), org (6), variadics (6), 2023 (6), cppreference (6), names (6), but (6), println (6), single (6), only (6), bar (6), tuple (6), ellipsis (6), them (6), values (6), call (6), omitted (6), than (6), tcl (5), external (5), 2025 (5), many (5), php (5), manual (5), typing (5), static (5), c23 (5), stdarg (5), since (5), there (5), after (5), name (5), output (5), timeoftheday (5), count (5), def (5), strings (5), program (5), system (5), format (5), nil (5), note (5), keyword (5), must (5), such (5), value (5), reduce (5), intent (5), fortran (5), before (5), second (5), va_copy (5), contents (4), search (4), additional (4), apply (4), swift (4), ruby (4), perl (4), javascript (4), october (4), gnu (4), over (4), same_as (4), here (4), same (4), template (4), greet (4), maria (4), william (4), clara (4), joseph (4), looks (4), people (4), when (4), func (4), catch (4), world (4), usize (4), safe (4), calculate (4), support (4), care (4), these (4), declared (4), create (4), three (4), even (4), import (4), both (4), however (4), real (4), been (4), routines (4), allows (4), read (4), returns (4), incorrect (4), then (4), class (4), called (4), fmt (4), arbitrary (4), subroutine (4), present (4), outputs (4), fixed (4), iter (4), elementtype (4), templates (4), nullptr (4), could (4), printf (4), file (4), take (4), hedge (4), term (4), hide (4), move (4), sidebar (4), toggle (3), view (3), available (3), you (3), dead (3), too (3), different (3), free (3), delphi (3), www (3), 2022 (3), menu (3), hedges (3), new (3), named (3), needed (3), macro (3), see (3), foreach (3), its (3), empty (3), common (3), methods (3), length (3), access (3), expr (3), uses (3), essentially (3), macros (3), prints (3), say (3), sub (3), unflattened (3), elements (3), raku (3), formal (3), defines (3), data (3), compiler (3), standard (3), form (3), entries (3), processed (3), forces (3), rest (3), because (3), public (3), out (3), total (3), integer (3), result (3), element (3), pack (3), fooprint (3), required (3), writeline (3), scan (3), programmer (3), instance (3), next (3), get (3), normally (3), average (3), cases (3), null (3), double (3), header (3), thus (3), variables (3), functional (3), tools (3), add (2), safety (2), contact (2), privacy (2), policy (2), terms (2), site (2), non (2), inc (2), categories (2), haskell (2), 2018 (2), unsourced (2), statements (2), description (2), wikidata (2), subroutines (2), implementation (2), documentation (2), proc (2), devs (2), docs (2), lang (2), kwargs (2), project (2), convertible_to (2), link (2), pdf (2), n2975 (2), relax (2), requirements (2), lists (2), what (2), cstdarg (2), references (2), unspecified (2), already (2), between (2), notes (2), puts (2), procedure (2), contain (2), pattern (2), unit (2), private (2), consequentially (2), actually (2), method (2), store (2), receive (2), scala (2), mut (2), let (2), unsafe (2), feature (2), c_variadic (2), switch (2), considered (2), marked (2), annotated (2), multiple (2), val (2), integers (2), behaving (2), how (2), iterable (2), contextual (2), flatten (2), within (2), less (2), flattened (2), known (2), though (2), sometimes (2), sequence (2), none (2), echo (2), array_sum (2), typed (2), allow (2), specification (2), requires (2), need (2), variant (2), record (2), portable (2), implement (2), supports (2), const (2), standardized (2), standards (2), built (2), process_entries (2), vararg (2), processing (2), pairs (2), local (2), usage (2), provided (2), creating (2), version (2), lower (2), exactly (2), typescript (2), denoted (2), possible (2), although (2), denotes (2), package (2), equivalent (2), would (2), identical (2), slice (2), num (2), alternatively (2), revision (2), ones (2), var (2), auto (2), vectors (2), where (2), typename (2), risk (2), cert (2), true (2), argv (2), char (2), argc (2), allowing (2), manyvalues (2), params (2), calling (2), existing (2), initialised (2), once (2), invoking (2), time (2), behavior (2), longer (2), declares (2), invocation (2), some (2), correct (2), information (2), sentinel (2), problems (2), attack (2), include (2), learn (2), help (2), related (2), sequences (2), rewriting (2), implemented (2), security (2), stack (2), formatting (2), operations (2), overview (2), appearance (2), upload (2), changes (2), history (2), article (2), account (2), donate (2), topic, mobile, cookie, statement, statistics, developers, conduct, legal, contacts, disclaimers, text, under, agree, registered, trademark, profit, organization, wikimedia, foundation, creative, commons, attribution, sharealike, license, rendered, parsoid, edited, september, utc, hidden, sharp, issues, needing, clarification, february, comparisons, https, index, title, variadic_function, oldid, 1376389997, libc, tutorial, task, showing, 120, rosetta, tcler, wiki, june, blocks, rfc, book, 2137, annotating, guide, intel, april, dev, dcl50, cpp, define, gilding, alex, meneide, jeanheyd, wg14, july, finished, archived, 2012, 2007, original, cplusplus, clp, constraint, logic, klemens, ben, 2014, reilly, media, 224, 978, 1491904442, isbn, 21st, century, tips, school, making, specify, taking, removal, definitions, syntax, purpose, change, increase, compatibility, llength, lambda, possibly, remaining, cares, arg, extern, pub, able, interact, via, interfaces, itself, guaranteed, linkage, decompose, recursively, stringify, force, macro_rules, instead, why, fills, plus, sign, decides, handle, based, upon, context, simply, put, fill, case, works, rule, asterisks, keep, asterisk, dissolving, layers, iterated, iterables, classified, groups, body, str, dict, stored, dictionary, __main__, __name__, immutable, typeerror, unless, freepascal, externally, technically, imposes, restriction, arrays, homogenous, requirement, circumvented, utilizing, mechanism, defined, nonetheless, mechanisms, associated, routine, definition, member, aforementioned, inspection, subsequent, appropriate, handling, vtype, records, tvarrec, resembling, dialects, 7185, 10206, extended, neither, certain, additionally, writestr, readstr, writeln, write, readln, except, iso, writes, stdout, separated, newlines, placeholder, add5, should, otherwise, designates, pass, tables, higher, constructing, anything, sumatleasttwo, least, sumexactlythree, forcing, exact, prototype, usable, created, collects, entire, notation, require, wrapping, usual, individual, range, ints, trailing, interface, mandatory, contains, denote, introduced, pseudo, constant, 2nd, 4th, positioned, newline, implicit, test, accept, still, attribute, intrinsic, detect, presence, appear, anywhere, push_back, while, begin, zip, input, tuples, designed, interoperability, mind, offers, particular, expansions, declaration, constrain, similar, intended, convertible, concept, strongly, prefers, due, misuse, achieve, coding, 14f, lacks, fold, expressions, basic, facility, largely, prior, comma, without, until, those, adopts, matching, ignoring, namespace, describes, either, hand, pre, having, latter, syntactic, sugar, objects, clones, going, back, achieved, clone, scanning, disposing, needs, cloned, containing, serves, clean, wanted, initialise, your, again, previously, descriptor, expands, specified, successive, invocations, turn, occurs, bearings, initialises, issue, warning, wholly, prevent, compilation, completing, four, matched, corresponding, working, manipulated, compute, know, their, above, expects, frequent, means, enforced, figured, depends, supply, indicate, fewer, believes, cause, invalid, areas, memory, lead, vulnerabilities, depending, encounter, dedicated, target, avoid, pointer, increments, address, stdio, portably, older, favor, deprecated, section, remove, message, please, removing, elaborating, pertinent, improve, irrelevant, excessive, subject, research, unlike, themselves, constraints, point, misleading, referring, phenomenon, phrasing, mixed, resulting, synonymous, meaning, word, difference, allowed, complementary, calls, supplied, passing, returning, instances, final, further, explanation, citation, expose, incautiously, give, rise, holes, permits, attempt, pop, off, were, placed, corrupting, leading, unexpected, consequence, considers, high, severity, coordination, center, attacks, another, operation, specifies, provide, formatted, lisp, mathematical, logical, come, across, naturally, summing, thought, applicable, operands, formally, applied, associative, property, concatenation, indefinite, accepts, differs, widely, among, arity, computer, mathematics, redirects, library, encyclopedia, item, projects, printable, download, export, legacy, parser, shortened, url, cite, permanent, general, actions, english, talk, українська, русский, polski, 한국어, 日本語, italiano, français, deutsch, subsection, top, personal, special, pages, recent, community, portal, contribute, random, current, events, navigation, jump, content,
Text of the page (random words):
nded to be convertible 8 using std same_as equivalent to java declaration t void fn t args template typename t void fn same_as t auto args carbon edit carbon a language designed with interoperability with c in mind offers variadics in particular pack expansions 9 takes an arbitrary number of vectors with arbitrary element types and returns a vector of tuples where the i th element of the vector is a tuple of the i th elements of the input vectors fn zip each elementtype type each vector vector each elementtype vector each elementtype var each iter auto each vector begin var result vector each elementtype while and each iter each vector end result push_back each iter each iter return result fortran edit since the fortran 90 revision fortran functions or subroutines can accept optional arguments 10 the argument list is still fixed but the ones that have the optional attribute can be omitted in the function subroutine call the intrinsic function present can be used to detect the presence of an optional argument the optional arguments can appear anywhere in the argument list program test implicit none real x all arguments are passed call foo 1 2 3 0 4 x outputs 1 2 3 0 4 6 0 the denotes a newline the last 2 arguments are omitted call foo 1 2 3 0 outputs 1 2 3 0 the 2nd and 4th arguments are omitted the arguments that are positioned after an omitted argument must be passed with a keyword call foo 1 c 3 0 e x outputs 1 3 0 6 0 alternatively the fortran 2023 revision has introduced the nil pseudo constant to denote an omitted argument call foo 1 nil 3 0 nil x outputs 1 3 0 6 0 contains the subroutine foo has 2 mandatory and 3 optional arguments subroutine foo a b c d e integer intent in a integer intent in optional b real intent in c integer intent in optional d real intent out optional e print a if present b print b print c if present d print d if present e then e 2 c print c end if end subroutine end program go edit variadic functions in go can be called with any number of trailing arguments 11 fmt println is a common variadic function it uses an empty interface as a catch all type package main import fmt this variadic function takes an arbitrary number of ints as arguments func sum nums int fmt print the sum of nums also a variadic function total 0 for _ num range nums total num fmt println is total also a variadic function func main variadic functions can be called in the usual way with individual arguments sum 1 2 the sum of 1 2 is 3 sum 1 2 3 the sum of 1 2 3 is 6 if you already have multiple args in a slice apply them to a variadic function using func slice like this nums int 1 2 3 4 sum nums the sum of 1 2 3 4 is 10 output the sum of 1 2 is 3 the sum of 1 2 3 is 6 the sum of 1 2 3 4 is 10 java edit as with c the object type in java is available as a catch all in java a parameter can be variadic using the ellipsis notation this is essentially equivalent to an array however it does not require wrapping as an array for example string args and string args would be essentially identical package org wikipedia examples public class program variadic methods store any additional arguments they receive in an array consequentially printargs is actually a method with one parameter a variable length array of string s private static void printargs string strings for string s strings system out println s public static void main string args printargs hello short for printargs new string hello printargs hello world short for printargs new string hello world printargs args prints the entire args array javascript edit javascript does not care about types of variadic arguments the variadic argument is denoted with which denotes a rest parameter which collects the arguments into an array function sum numbers return numbers reduce a b a b 0 console log sum 1 2 3 6 console log sum 3 2 5 console log sum 0 it is also possible to create a variadic function using the arguments object although it is only usable with functions created with the function keyword function sum return array prototype reduce call arguments a b a b 0 console log sum 1 2 3 6 console log sum 3 2 5 console log sum 0 note that in typescript because the rest parameter is an array this is denoted as so function sum numbers number number return numbers reduce a b a b 0 typescript also allows forcing the rest parameter to have an exact number of elements i e a tuple forces exactly three numbers function sumexactlythree numbers number number number number return numbers reduce a b a b 0 forces at least two numbers function sumatleasttwo numbers number number number number return numbers reduce a b a b 0 forces the first argument to be a string then anything after function log args string any lua edit lua functions may pass varargs to other functions the same way as other values using the return keyword tables can be passed into variadic functions by using in lua version 5 2 or higher 12 table unpack or lua 5 1 or lower 13 unpack varargs can be used as a table by constructing a table with the vararg as a value function sum designates varargs local sum 0 for _ v in pairs do creating a table with a varargs is the same as creating one with standard values sum sum v end return sum end values 1 2 3 4 sum 5 table unpack values returns 15 table unpack should go after any other arguments otherwise not all values will be passed into the function function add5 return 5 this is incorrect usage of varargs and will only return the first value provided end entries function process_entries local processed for i v in pairs entries do processed i v placeholder processing code end return table unpack processed returns all entries in a way that can be used as a vararg end print process_entries the print function takes all varargs and writes them to stdout separated by newlines pascal edit pascal is standardized by iso standards 7185 standard pascal and 10206 extended pascal neither standardized form of pascal supports variadic routines except for certain built in routines read readln and write writeln and additionally in ep readstr writestr nonetheless dialects of pascal implement mechanisms resembling variadic routines delphi defines an array of const data type that may be associated with the last formal parameter within the routine definition the array of const is an array of tvarrec an array of variant records 14 the vtype member of the aforementioned record data type allows inspection of the argument s data type and subsequent appropriate handling the free pascal compiler supports delphi s variadic routines too 15 this implementation however technically requires a single argument that is an array pascal imposes the restriction that arrays need to be homogenous this requirement is circumvented by utilizing a variant record the gnu pascal defines a real variadic formal parameter specification using an ellipsis but as of 2022 no portable mechanism to use such has been defined 16 both gnu pascal and freepascal allow externally declared functions to use a variadic formal parameter specification using an ellipsis php edit php does not care about types of variadic arguments unless the argument is typed function sum nums int return array_sum nums echo sum 1 2 3 6 and typed variadic arguments function sum int nums int return array_sum nums echo sum 1 a 3 typeerror argument 2 passed to sum must be of the type int since php 7 3 python edit python does not care about types of variadic arguments from typing import any def foo a any b any args tuple any none print args args is a tuple immutable sequence if __name__ __main__ foo 1 2 args foo 1 2 3 args 3 foo 1 2 3 hello args 3 hello keyword arguments can be stored in a dictionary from typing import any unpack def bar args tuple any kwargs unpack dict str any any function body note that even though args has type tuple any args is sometimes annotated with typing any 17 raku edit in raku the type of parameters that create variadic functions are known as slurpy array parameters and they re classified into three groups flattened slurpy edit these parameters are declared with a single asterisk and they flatten arguments by dissolving one or more layers of elements that can be iterated over i e iterables sub foo a b args say args perl foo 1 2 foo 1 2 3 3 foo 1 2 3 hello 3 hello foo 1 2 3 4 5 6 3 4 5 6 unflattened slurpy edit these parameters are declared with two asterisks and they do not flatten any iterable arguments within the list but keep the arguments more or less as is sub bar a b args say args perl bar 1 2 bar 1 2 3 3 bar 1 2 3 hello 3 hello bar 1 2 3 4 5 6 3 4 5 6 contextual slurpy edit these parameters are declared with a plus sign and they apply the single argument rule which decides how to handle the slurpy argument based upon context simply put if only a single argument is passed and that argument is iterable that argument is used to fill the slurpy parameter array in any other case works like i e unflattened slurpy sub zaz a b args say args perl zaz 1 2 zaz 1 2 3 3 zaz 1 2 3 hello 3 hello zaz 1 2 4 5 4 5 single argument fills up array zaz 1 2 3 4 5 3 4 5 behaving as zaz 1 2 3 4 5 6 3 4 5 6 behaving as ruby edit ruby does not care about types of variadic arguments def foo args print args end foo 1 prints 1 nil foo 1 2 prints 1 2 nil rust edit rust does not support variadic arguments in functions instead it uses macros which support variadic arguments 18 this is essentially why println is a macro and not a function as it takes variadic arguments to format macro_rules calculate the pattern for a single eval eval e expr let val usize e force types to be integers println stringify e val decompose multiple eval s recursively eval e expr eval es expr calculate eval e calculate eval es fn main calculate eval 1 2 eval 3 4 eval 2 3 1 rust is able to interact with c s variadic system via a c_variadic feature switch as with other c interfaces the system is considered unsafe to rust and marked with c linkage 19 the variadic parameter itself is annotated with and the function may be marked safe if it is guaranteed not to access its variadic arguments 20 feature c_variadic pub unsafe extern c fn add n usize mut args usize let mut sum 0 for _ in 0 n sum args arg usize sum scala edit object program variadic methods store any additional arguments they receive in an array consequentially printargs is actually a method with one parameter a variable length array of string s private def printargs strings string unit strings foreach println def main args array string unit printargs hello short for printargs hello printargs hello world short for printargs hello world swift edit swift cares about the type of variadic arguments but the catch all any type is available func greet timeoftheday string names string here names is string print looks like we have names count people for name in names print hello name good timeoftheday greet timeoftheday morning names joseph clara william maria output looks like we have 4 people hello joseph good morning hello clara good morning hello william good morning hello maria good morning tcl edit a tcl procedure or lambda is variadic when its last argument is args this will contain a list possibly empty of all the remaining arguments this pattern is common in many other procedure like methods 21 22 proc greet timeoftheday args puts looks like we have llength args people foreach name args puts hello name good timeoftheday greet morning joseph clara william maria output looks like we have 4 people hello joseph good morning hello clara good morning hello william good morning hello maria good morning see also edit variadic macro variadic template notes edit making the named parameter optional was needed since there was no way to specify a function taking an unspecified number of arguments in c23 after the removal of k r style function definitions since c was already using this syntax for the same purpose this change was also a way to increase compatibility between the languages 4 references edit klemens ben 2014 21st century c c tips from the new school o reilly media inc p 224 isbn 978 1491904442 clp h constraint logic programming for hedges cstdarg stdarg h c reference www cplusplus com archived from the original on 2012 10 31 retrieved 2007 10 02 c23 is finished here is what is on the menu n2975 relax requirements for variadic parameter lists 31 july 2022 gilding alex meneide jeanheyd 2022 04 15 wg14 n2975 relax requirements for variadic parameter lists v3 pdf dcl50 cpp do not define a c style variadic function dead link cppreference com std same_as cppreference com cppreference com retrieved 17 may 2026 cppreference com std convertible_to cppreference com cppreference com retrieved 17 may 2026 carbon language project 1 april 2026 variadics carbon language documentation docs carbon lang dev carbon language project optional arguments intel retrieved 2025 03 18 go by example variadic functions lua 5 2 reference manual www lua org retrieved 2023 02 05 lua 5 1 reference manual www lua org retrieved 2023 02 05 parameters delphi retrieved 2023 08 28 free pascal reference guide retrieved 2023 08 28 the gnu pascal manual retrieved 2023 08 28 annotating args and kwargs static typing with python typing python org retrieved 2026 05 22 variadics rust by example 2137 variadic the rust rfc book the rust devs 25 june 2026 external blocks docs rust lang org the rust devs proc manual page tcl tk documentation args tcler s wiki external links edit variadic function rosetta code task showing the implementation of variadic functions in over 120 programming languages variable argument functions a tutorial on variable argument functions for c gnu libc manual retrieved from https en wikipedia org w index php title variadic_function oldid 1376389997 categories subroutines programming language comparisons hidden categories articles with short description short description is different from wikidata all articles with unsourced statements articles with unsourced statements from february 2018 wikipedia articles needing clarification from may 2018 articles with too many examples from october 2025 all articles with too many examples wikipedia articles with style issues from october 2025 all articles with dead external links articles with dead external links from october 2025 articles with example c code articles with example c code articles with example c sharp code articles with example haskell code articles with example java code articles with example javascript code articles with example pascal code articles with example perl code articles with example python programming language code articles with example ruby code articles with example rust code articles with example swift code articles with example tcl code this page was last edited on 23 september 2026 at 22 18 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy ...
|
