Decrement operators

Synopses

Declared in <mp‐units/framework/quantity.h>

Pre‐decrements the numerical value.

constexpr
quantity&
operator‐‐() &
requires requires(rep& v) {
      { ‐‐v } ‐> std::same_as<rep&>;
    };

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Post‐decrements the numerical value.

[[nodiscard]]
constexpr
QuantityOf<quantity_spec> auto
operator‐‐(int unused_tag)
requires requires(rep& v) {
      { v‐‐ } ‐> std::common_with<rep>;
    };

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Return Value

  • *this, after the decrement.

  • A quantity holding the value of *this before the decrement.

Parameters

Name

Description

unused_tag

An unused tag parameter that distinguishes this overload as the post‐decrement operator.

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