Function template
A function template is a parameterized definition from which functions for specific template arguments can be generated.
100 C++ Mistakes and How to Avoid Them
A function template is a C++ template that defines a family of functions generated for specific argument or type combinations.
- How it is used
- Uses generic programming to keep array operations type-specific while avoiding unsafe polymorphic array interfaces.
- How deep it goes
- Demonstrates template declarations, compiler-generated type-specific functions, and observable destruction behavior without exploring template internals.
- Examples
- Shows templated printing and deletion for B and D arrays, plus comparison-driven vector filtering.
- What you can do after
- Apply function templates to generate separate operations for concrete array types and parameterize comparison behavior.
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Learn C++ by Example
A function template is a parameterized function definition from which functions for specific template arguments can be generated.
- How it is used
- Generalizes addition across argument types and injects selectable behavior into a dictionary-based game.
- How deep it goes
- Explains syntax, return-type deduction, library alternatives, and testing use; stops short of extensive template internals.
- Examples
- Uses generic addition, std::plus<int>, std::plus<>, and a dictionary selector tested with deterministic lambdas.
- What you can do after
- Build reusable type-generic functions and test configurable behavior by supplying alternative callable selectors.
Related concepts
- filteringuses · Filtering is the operation of selecting or excluding items from a collection according to specified criteria.
- trailing return typeaddressed by · A trailing return type is C++ syntax that places a function's return type after its parameter list using an arrow.
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