LANG.STRUCT.LOOP.MFTERM : Malformed for-loop Condition

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The second ("termination condition") clause of a for loop header includes one or more elements that are modified in the loop body.

Class Name

Malformed for-loop Condition

Significance

style

Mnemonic

LANG.STRUCT.LOOP.MFTERM

Categories

MisraC2023	MisraC2023:14.2	A for loop shall be well-formed
Misra2012	Misra2012:14.2	A for loop shall be well-formed
Misra2004	Misra2004:13.5	The three expressions of a for statement shall be concerned only with loop control
	Misra2004:13.6	Numeric variables being used within a for loop for iteration counting shall not be modified in the body of the loop
AUTOSARC++14	AUTOSARC++14:M6-5-3	The loop-counter shall not be modified within condition or statement.
	AUTOSARC++14:M6-5-5	A loop-control-variable other than the loop-counter shall not be modified within condition or expression.
MisraC++2008	MisraC++2008:6-5-3	The loop-counter shall not be modified within condition or statement.
	MisraC++2008:6-5-5	A loop-control-variable other than the loop-counter shall not be modified within condition or expression.
MisraC++2023	MisraC++2023:9.5.1	Legacy for statements should be simple
JSF++	JSF++:201	Numeric variables being used within a for loop for iteration counting shall not be modified in the body of the loop.

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="Malformed for-loop Condition"

Note that retaining the unnormalized ASTs will increase the disk space used to store the project representation, and may make the analysis take longer.

void lang_struct_loop_mfterm(void){
    int i;
    int buf[10];

    for (i = 0; i < 10; i++){                    /* i not modified in loop body */
        buf[i] = 10;
    }

    for (i = 0; i < 10; i++){ /* 'Malformed for-loop Condition' warning issued here */
        buf[i++] = 10;
    }
}

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

LANG.STRUCT.LOOP.MFTERM : Malformed for-loop Condition

Summary

Properties

Example

Relevant Configuration File Parameters