requires expression (since C++20) – cppreference.com

July 2, 2025

Requirements may refer to the template parameters that are in scope, to the parameters of parameter-list, and to any other declarations that are visible from the enclosing context.

https://en.cppreference.com/w/cpp/language/requires.html

requires expression (since C++20) – cppreference.com <body> <h1> Array ( [0] => eequires expression (since c++20) – cppreference.com [1] => dequires expression (since c++20) – cppreference.com [2] => fequires expression (since c++20) – cppreference.com [3] => tequires expression (since c++20) – cppreference.com [4] => 5equires expression (since c++20) – cppreference.com [5] => 4equires expression (since c++20) – cppreference.com [6] => rwquires expression (since c++20) – cppreference.com [7] => rsquires expression (since c++20) – cppreference.com [8] => rdquires expression (since c++20) – cppreference.com [9] => rrquires expression (since c++20) – cppreference.com [10] => r4quires expression (since c++20) – cppreference.com [11] => r3quires expression (since c++20) – cppreference.com [12] => re1uires expression (since c++20) – cppreference.com [13] => re2uires expression (since c++20) – cppreference.com [14] => rewuires expression (since c++20) – cppreference.com [15] => reauires expression (since c++20) – cppreference.com [16] => reqyires expression (since c++20) – cppreference.com [17] => reqhires expression (since c++20) – cppreference.com [18] => reqjires expression (since c++20) – cppreference.com [19] => reqiires expression (since c++20) – cppreference.com [20] => req8ires expression (since c++20) – cppreference.com [21] => req7ires expression (since c++20) – cppreference.com [22] => requures expression (since c++20) – cppreference.com [23] => requjres expression (since c++20) – cppreference.com [24] => requkres expression (since c++20) – cppreference.com [25] => requores expression (since c++20) – cppreference.com [26] => requ9res expression (since c++20) – cppreference.com [27] => requ8res expression (since c++20) – cppreference.com [28] => requiees expression (since c++20) – cppreference.com [29] => requides expression (since c++20) – cppreference.com [30] => requifes expression (since c++20) – cppreference.com [31] => requites expression (since c++20) – cppreference.com [32] => requi5es expression (since c++20) – cppreference.com [33] => requi4es expression (since c++20) – cppreference.com [34] => requirws expression (since c++20) – cppreference.com [35] => requirss expression (since c++20) – cppreference.com [36] => requirds expression (since c++20) – cppreference.com [37] => requirrs expression (since c++20) – cppreference.com [38] => requir4s expression (since c++20) – cppreference.com [39] => requir3s expression (since c++20) – cppreference.com [40] => requirea expression (since c++20) – cppreference.com [41] => requirez expression (since c++20) – cppreference.com [42] => requirex expression (since c++20) – cppreference.com [43] => required expression (since c++20) – cppreference.com [44] => requiree expression (since c++20) – cppreference.com [45] => requirew expression (since c++20) – cppreference.com [46] => requires wxpression (since c++20) – cppreference.com [47] => requires sxpression (since c++20) – cppreference.com [48] => requires dxpression (since c++20) – cppreference.com [49] => requires rxpression (since c++20) – cppreference.com [50] => requires 4xpression (since c++20) – cppreference.com [51] => requires 3xpression (since c++20) – cppreference.com [52] => requires ezpression (since c++20) – cppreference.com [53] => requires ecpression (since c++20) – cppreference.com [54] => requires edpression (since c++20) – cppreference.com [55] => requires espression (since c++20) – cppreference.com [56] => requires exoression (since c++20) – cppreference.com [57] => requires exlression (since c++20) – cppreference.com [58] => requires ex-ression (since c++20) – cppreference.com [59] => requires ex0ression (since c++20) – cppreference.com [60] => requires expeession (since c++20) – cppreference.com [61] => requires expdession (since c++20) – cppreference.com [62] => requires expfession (since c++20) – cppreference.com [63] => requires exptession (since c++20) – cppreference.com [64] => requires exp5ession (since c++20) – cppreference.com [65] => requires exp4ession (since c++20) – cppreference.com [66] => requires exprwssion (since c++20) – cppreference.com [67] => requires exprsssion (since c++20) – cppreference.com [68] => requires exprdssion (since c++20) – cppreference.com [69] => requires exprrssion (since c++20) – cppreference.com [70] => requires expr4ssion (since c++20) – cppreference.com [71] => requires expr3ssion (since c++20) – cppreference.com [72] => requires expreasion (since c++20) – cppreference.com [73] => requires exprezsion (since c++20) – cppreference.com [74] => requires exprexsion (since c++20) – cppreference.com [75] => requires expredsion (since c++20) – cppreference.com [76] => requires expreesion (since c++20) – cppreference.com [77] => requires exprewsion (since c++20) – cppreference.com [78] => requires expresaion (since c++20) – cppreference.com [79] => requires expreszion (since c++20) – cppreference.com [80] => requires expresxion (since c++20) – cppreference.com [81] => requires expresdion (since c++20) – cppreference.com [82] => requires expreseion (since c++20) – cppreference.com [83] => requires expreswion (since c++20) – cppreference.com [84] => requires expressuon (since c++20) – cppreference.com [85] => requires expressjon (since c++20) – cppreference.com [86] => requires expresskon (since c++20) – cppreference.com [87] => requires expressoon (since c++20) – cppreference.com [88] => requires express9on (since c++20) – cppreference.com [89] => requires express8on (since c++20) – cppreference.com [90] => requires expressiin (since c++20) – cppreference.com [91] => requires expressikn (since c++20) – cppreference.com [92] => requires expressiln (since c++20) – cppreference.com [93] => requires expressipn (since c++20) – cppreference.com [94] => requires expressi0n (since c++20) – cppreference.com [95] => requires expressi9n (since c++20) – cppreference.com [96] => requires expressiob (since c++20) – cppreference.com [97] => requires expressiom (since c++20) – cppreference.com [98] => requires expressioj (since c++20) – cppreference.com [99] => requires expressioh (since c++20) – cppreference.com [100] => requires expression (aince c++20) – cppreference.com [101] => requires expression (zince c++20) – cppreference.com [102] => requires expression (xince c++20) – cppreference.com [103] => requires expression (dince c++20) – cppreference.com [104] => requires expression (eince c++20) – cppreference.com [105] => requires expression (wince c++20) – cppreference.com [106] => requires expression (sunce c++20) – cppreference.com [107] => requires expression (sjnce c++20) – cppreference.com [108] => requires expression (sknce c++20) – cppreference.com [109] => requires expression (sonce c++20) – cppreference.com [110] => requires expression (s9nce c++20) – cppreference.com [111] => requires expression (s8nce c++20) – cppreference.com [112] => requires expression (sibce c++20) – cppreference.com [113] => requires expression (simce c++20) – cppreference.com [114] => requires expression (sijce c++20) – cppreference.com [115] => requires expression (sihce c++20) – cppreference.com [116] => requires expression (sinxe c++20) – cppreference.com [117] => requires expression (sinve c++20) – cppreference.com [118] => requires expression (sinfe c++20) – cppreference.com [119] => requires expression (sinde c++20) – cppreference.com [120] => requires expression (sincw c++20) – cppreference.com [121] => requires expression (sincs c++20) – cppreference.com [122] => requires expression (sincd c++20) – cppreference.com [123] => requires expression (sincr c++20) – cppreference.com [124] => requires expression (sinc4 c++20) – cppreference.com [125] => requires expression (sinc3 c++20) – cppreference.com [126] => requires expression (since x++20) – cppreference.com [127] => requires expression (since v++20) – cppreference.com [128] => requires expression (since f++20) – cppreference.com [129] => requires expression (since d++20) – cppreference.com [130] => requires expression (since c++10) – cppreference.com [131] => requires expression (since c++q0) – cppreference.com [132] => requires expression (since c++w0) – cppreference.com [133] => requires expression (since c++30) – cppreference.com [134] => requires expression (since c++29) – cppreference.com [135] => requires expression (since c++2o) – cppreference.com [136] => requires expression (since c++2p) – cppreference.com [137] => requires expression (since c++2-) – cppreference.com [138] => requires expression (since c++20) ᰫ cppreference.com [139] => requires expression (since c++20) &#u211; cppreference.com [140] => requires expression (since c++20) &#i211; cppreference.com [141] => requires expression (since c++20) ⏻ cppreference.com [142] => requires expression (since c++20) ᾯ cppreference.com [143] => requires expression (since c++20) &#8q11; cppreference.com [144] => requires expression (since c++20) &#8w11; cppreference.com [145] => requires expression (since c++20) ⁷ cppreference.com [146] => requires expression (since c++20) ” cppreference.com [147] => requires expression (since c++20) &#82q1; cppreference.com [148] => requires expression (since c++20) — cppreference.com [149] => requires expression (since c++20) &#821q; cppreference.com [150] => requires expression (since c++20) – xppreference.com [151] => requires expression (since c++20) – vppreference.com [152] => requires expression (since c++20) – fppreference.com [153] => requires expression (since c++20) – dppreference.com [154] => requires expression (since c++20) – copreference.com [155] => requires expression (since c++20) – clpreference.com [156] => requires expression (since c++20) – c-preference.com [157] => requires expression (since c++20) – c0preference.com [158] => requires expression (since c++20) – cporeference.com [159] => requires expression (since c++20) – cplreference.com [160] => requires expression (since c++20) – cp-reference.com [161] => requires expression (since c++20) – cp0reference.com [162] => requires expression (since c++20) – cppeeference.com [163] => requires expression (since c++20) – cppdeference.com [164] => requires expression (since c++20) – cppfeference.com [165] => requires expression (since c++20) – cppteference.com [166] => requires expression (since c++20) – cpp5eference.com [167] => requires expression (since c++20) – cpp4eference.com [168] => requires expression (since c++20) – cpprwference.com [169] => requires expression (since c++20) – cpprsference.com [170] => requires expression (since c++20) – cpprdference.com [171] => requires expression (since c++20) – cpprrference.com [172] => requires expression (since c++20) – cppr4ference.com [173] => requires expression (since c++20) – cppr3ference.com [174] => requires expression (since c++20) – cpprederence.com [175] => requires expression (since c++20) – cpprecerence.com [176] => requires expression (since c++20) – cppreverence.com [177] => requires expression (since c++20) – cppregerence.com [178] => requires expression (since c++20) – cppreterence.com [179] => requires expression (since c++20) – cpprererence.com [180] => requires expression (since c++20) – cpprefwrence.com [181] => requires expression (since c++20) – cpprefsrence.com [182] => requires expression (since c++20) – cpprefdrence.com [183] => requires expression (since c++20) – cpprefrrence.com [184] => requires expression (since c++20) – cppref4rence.com [185] => requires expression (since c++20) – cppref3rence.com [186] => requires expression (since c++20) – cpprefeeence.com [187] => requires expression (since c++20) – cpprefedence.com [188] => requires expression (since c++20) – cpprefefence.com [189] => requires expression (since c++20) – cpprefetence.com [190] => requires expression (since c++20) – cpprefe5ence.com [191] => requires expression (since c++20) – cpprefe4ence.com [192] => requires expression (since c++20) – cppreferwnce.com [193] => requires expression (since c++20) – cpprefersnce.com [194] => requires expression (since c++20) – cppreferdnce.com [195] => requires expression (since c++20) – cppreferrnce.com [196] => requires expression (since c++20) – cpprefer4nce.com [197] => requires expression (since c++20) – cpprefer3nce.com [198] => requires expression (since c++20) – cppreferebce.com [199] => requires expression (since c++20) – cppreferemce.com [200] => requires expression (since c++20) – cppreferejce.com [201] => requires expression (since c++20) – cppreferehce.com [202] => requires expression (since c++20) – cppreferenxe.com [203] => requires expression (since c++20) – cppreferenve.com [204] => requires expression (since c++20) – cppreferenfe.com [205] => requires expression (since c++20) – cppreferende.com [206] => requires expression (since c++20) – cppreferencw.com [207] => requires expression (since c++20) – cppreferencs.com [208] => requires expression (since c++20) – cppreferencd.com [209] => requires expression (since c++20) – cppreferencr.com [210] => requires expression (since c++20) – cppreferenc4.com [211] => requires expression (since c++20) – cppreferenc3.com [212] => requires expression (since c++20) – cppreference,com [213] => requires expression (since c++20) – cppreferencelcom [214] => requires expression (since c++20) – cppreference;com [215] => requires expression (since c++20) – cppreference/com [216] => requires expression (since c++20) – cppreference.xom [217] => requires expression (since c++20) – cppreference.vom [218] => requires expression (since c++20) – cppreference.fom [219] => requires expression (since c++20) – cppreference.dom [220] => requires expression (since c++20) – cppreference.cim [221] => requires expression (since c++20) – cppreference.ckm [222] => requires expression (since c++20) – cppreference.clm [223] => requires expression (since c++20) – cppreference.cpm [224] => requires expression (since c++20) – cppreference.c0m [225] => requires expression (since c++20) – cppreference.c9m [226] => requires expression (since c++20) – cppreference.con [227] => requires expression (since c++20) – cppreference.cok [228] => requires expression (since c++20) – cppreference.coj ) </h1> </body>