stackoverflow May 5, 2026 Rep: 24,414

Am I understanding the “no effects” guarantee in the C++ standard correctly?

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May 5, 2026 Score: 6 Rep: 53,321 Quality: High Completeness: 30%

"Effects" is a term of art:

[structure.specifications]/3.6 Effects: the actions performed by the function.

Thus, when you see "no effects" in the "Effects" section of a library function definition, it only means that the actions described elsewhere in that section are not in fact performed.

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Am I understanding the “no effects” guarantee in the C++ standard correctly?

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