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V3143. The 'value' parameter is rewritt…
Analyzer Diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Diagnosis of micro-optimizations (C++)
Diagnosis of 64-bit errors (Viva64, C++)
MISRA errors
AUTOSAR errors
Additional information
Contents

V3143. The 'value' parameter is rewritten inside a property setter, and is not used after that.

Aug. 9, 2019

The analyzer has detected an assignment of some value to the 'value' parameter inside the property's setter, with the 'value' parameter never being used in the body of this setter after that. This may indicate a programming mistake or typo.

Consider the following example taken from a real project:

public LoggingOptions Options
{
    get { return m_loggingOptions; }
    set { value = m_loggingOptions; }
}

In this code, the value of the 'value' parameter is overwritten immediately after entering the property's set method, and the original value is lost. The developer must have made a typo and accidentally swapped 'value' and 'm_loggingOptions'. But if they did not intend to allow writing into this property, they could declare it with a private set method or avoid declaring the setter altogether.

This is what the fixed version could look like:

public LoggingOptions Options
{
    get { return m_loggingOptions; }
    set { m_loggingOptions = value; }
}

You can look at examples of errors detected by the V3143 diagnostic.

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