This rule is part of MISRA C++:2023.
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Rule 8.19.1 - The comma operator should not be used
Category: Advisory
Analysis: Decidable,Single Translation Unit
Amplification
This rule applies to the use of the comma operator, but not when a comma is used as the fold operator within a fold expression.
Rationale
Use of the comma operator is generally detrimental to the readability of code, and the same effect can usually be achieved by other means.
Example
f( ( 1, 2 ), 3 ); // Non-compliant - how many parameters?
template< typename ... Ts >
void print_all_of( const Ts &... ts )
{
( print( ts ), ... ); // Rule does not apply
}
The following example is non-compliant with other rules:
for ( i = 0, p = &a[ 0 ]; i < N; ++i, ++p ) // Non-compliant
{
}
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