Is `std::bind` Obsolete in Modern C with the Rise of Lambdas?

Is std::bind Obsolete with C Lambdas?

In the pre-C 11 era, std::bind and boost::lambda were commonly employed for function binding. This served a crucial role before lambdas were integrated into the core C language. However, with the advent of C 11 and the seamless integration of lambdas, developers began questioning the relevance of std::bind.

Advantages of C Lambdas

C lambdas provide several advantages over std::bind:

• Conciseness: Lambdas offer a more concise and readable syntax, as exemplified in the provided code sample.
• Auto Parameter Types: In C 14 and later, lambda parameters can be automatically type-deduced, simplifying code.
• Variadic Templates: Lambdas can be easily combined with variadic templates, offering great flexibility.

Remaining Use Cases for std::bind

While lambdas fulfill most function binding requirements, std::bind retains limited use cases, including:

• Overloading Function Objects: std::bind allows overloading function objects, which may be useful in specific scenarios.
• Capturing By Value: In C 14 and earlier, lambdas capture variables as lvalues, whereas std::bind supports move capture.

Disadvantages of std::bind

Despite its remaining use cases, std::bind has some drawbacks:

• Name Binding: std::bind binds functions by name, which can be ambiguous when dealing with overloaded functions.
• Potential for Less Function Inlining: Using std::bind may reduce the likelihood of function inlining.
• Unintended Argument Masking: std::bind allows arguments to be silently ignored through the use of placeholders, which can introduce potential bugs.

Conclusion

In the context of C 14 and beyond, std::bind is generally considered superfluous. C lambdas offer a more powerful and flexible approach to function binding, rendering std::bind's earlier utility largely obsolete. However, for specific use cases involving function overloading or capturing by value, std::bind may still be a viable option.

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