c++ - Is it safe to cast a float with value 0.0f to boolean? -

i know due precision errors, float varibale should checked equal value with tolerance. what's case if manually set float variable 0.0f?

for example there function returning distance.

float distance() {     float value;     if(/* ... */)     {         // ...         return value;     }     else return 0.0f; }

can cast result bool safely?

if(distance()) {    // ... }

when write:

if(distance())

you checking whether float 0 or not.

your code equivalent to

if(distance() != 0)

this safe do, , can determine whether or not has meaning require.

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