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#  Constrained algorithms  (since C++20)

From cppreference.com

< [ cpp ](/w/cpp "cpp") ‎ | [ algorithm ](/w/cpp/algorithm "cpp/algorithm")

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[ Algorithm library ](/w/cpp/algorithm "cpp/algorithm")

**Constrained algorithms and algorithms on ranges** (C++20)  
---  
Constrained algorithms, e.g. [ ` ranges::copy ` ](/w/cpp/algorithm/ranges/copy
"cpp/algorithm/ranges/copy") , [ ` ranges::sort `
](/w/cpp/algorithm/ranges/sort "cpp/algorithm/ranges/sort") , ...  
[ Execution policies  (C++17)  ](/w/cpp/algorithm#Execution_policies
"cpp/algorithm")  
|  |  [ is_execution_policy  ](/w/cpp/algorithm/is_execution_policy "cpp/algorithm/is execution policy") (C++17)   
---  
  
|  [ execution::seq  execution::par  execution::par_unseq  execution::unseq
](/w/cpp/algorithm/execution_policy_tag "cpp/algorithm/execution policy tag")
(C++17)  (C++17)  (C++17)  (C++20)  
---  
  
|  |  [ execution::sequenced_policy  execution::parallel_policy  execution::parallel_unsequenced_policy  execution::parallel_unsequenced  ](/w/cpp/algorithm/execution_policy_tag_t "cpp/algorithm/execution policy tag t") (C++17)  (C++17)  (C++17)  (C++20)   
---  
  
|  [ Non-modifying sequence operations ](/w/cpp/algorithm#Non-
modifying_sequence_operations "cpp/algorithm")  
---  
[ Batch operations ](/w/cpp/algorithm#Batch_operations "cpp/algorithm")  
|  [ for_each  ](/w/cpp/algorithm/for_each "cpp/algorithm/for each")  
---  
  
|  [ for_each_n  ](/w/cpp/algorithm/for_each_n "cpp/algorithm/for each n")
(C++17)  
---  
  
[ Search operations ](/w/cpp/algorithm#Se