Error while conditional compilation of float values.

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vishwajit jadhav 2017-4-5

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https://ww2.mathworks.cn/matlabcentral/answers/333739-error-while-conditional-compilation-of-float-values

评论： Alexandre De Barros 2017-4-14

I am using IHME-8.2.0.15 (R2011b) version of polyspace. My code has conditional compilation part where it compares(<= or >=) two float values in #if condition. The polyspace throws error as "expression must have integral type" while compilation. Is there any way to allow float comparision in polyspace?

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Answer 1

Vandana Ravichandran 2017-4-12

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https://ww2.mathworks.cn/matlabcentral/answers/333739-error-while-conditional-compilation-of-float-values#answer_262798

编辑：Vandana Ravichandran 2017-4-12

While comparing floating-point numbers, it is invalid to use equality (==) or inequality (!=). There are two exceptions to this: when one of the operands is 0.0 because zero can be represented exactly, and when comparing a variable against itself such as foo == foo or foo != foo. However, it should be possible to use a different operator such as '>' or '<'.

Refer to the example listed on the following page:

https://www.mathworks.com/help/bugfinder/ref/invaliduseoffloatingpointoperation.html

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vishwajit jadhav 2017-4-13

Hi Vandana,Thank you for your answer.Polyspace does not allow any kind of comparision('<','>','<=','>=') of two different values.Is there any way to make polyspace ignore error?

Alexandre De Barros 2017-4-14