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CodeSonar® 9.2p0 CONFIDENTIAL CodeSecure Inc
C and C++

LANG.TYPE.ICTE : Inappropriate Cast Type: Expression

Summary

The value of a composite expression is cast to a different essential type category, or to a wider essential type.

Exception 1: warning of this class will not be issued when an expression of essentially real floating type is cast to an essentially complex floating type, provided that the corresponding real type is not wider than the type of the expression.

Exception 2: a warning of this class will not be issued when an expression of essentially complex floating type is cast to an essentially real floating type, provided that the type is not wider than the corresponding real type of the expression.

This warning class is based on the notions of essential type category and composite expression as described in MISRA C:2012 Guidelines for the use of the C language in critical systems.

Properties

Class Name Inappropriate Cast Type: Expression
Significance style
Mnemonic LANG.TYPE.ICTE
Categories
MisraC2025 MisraC2025:10.8 The value of a composite expression shall not be cast to a different essential type category or a wider essential type
MisraC2023 MisraC2023:10.8 The value of a composite expression shall not be cast to a different essential type category or a wider essential type
Misra2012 Misra2012:10.8 The value of a composite expression shall not be cast to a different essential type category or a wider essential type
Misra2004 Misra2004:10.3 The value of a complex expression of integer type shall only be cast to a type of the same signedness that is no wider than the underlying type of the expression
  Misra2004:10.4 The value of a complex expression of floating type shall only be cast to a floating type that is narrower or of the same size
AUTOSARC++14 AUTOSARC++14:M5-0-7 There shall be no explicit floating-integral conversions of a cvalue expression.
  AUTOSARC++14:M5-0-8 An explicit integral or floating-point conversion shall not increase the size of the underlying type of a cvalue expression.
MisraC++2008 MisraC++2008:5-0-7 There shall be no explicit floating-integral conversions of a cvalue expression.
  MisraC++2008:5-0-8 An explicit integral or floating-point conversion shall not increase the size of the underlying type of a cvalue expression.
CWE CWE:704 Incorrect Type Conversion or Cast
Availability Available for C and C++.
Enabling Checks for this warning class are disabled by default, and require the unnormalized C ASTs for the project. To enable them, add the following WARNING_FILTER rule and RETAIN_UNNORMALIZED_C_AST specification to the project configuration file. 
RETAIN_UNNORMALIZED_C_AST = Yes
WARNING_FILTER += allow class="Inappropriate Cast Type: Expression"
Note that retaining the unnormalized ASTs will increase the disk space used to store the project representation, and may make the analysis take longer.

Example 

void use_longs(long long1, long long2, long long3);

void TYPE_ICTE(short s1, short s2){
    long l1;
    long l2;
    long l3;
    double d;

    l1 = (long) (s1 + s2);   /* 'Inappropriate Cast Type: Expression' warning issued here */
    l2 = (double) (s1 + s2); /* 'Inappropriate Cast Type: Expression' warning issued here */
    l3 = (long) s1 + s2;                            /* operand of cast is s1 - not a composite expression */
    use_longs(l1, l2, l3);
}

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.

 

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