Self-determination in ANSI C

Question

I am currently working on an embedded C project, and I have “inherited” some old code containing instructions, such as:

rxStruct = rxStruct; 

where rxStruct is a variable.

What could be the use of such statements?

Answer 1

Without additional information, one use of such an operator is to prevent the warning of an unused compiler parameter if rxStruct is passed as a parameter and then not used otherwise.