Compiler Warnings About Unreachable Code

[drewr95]

Building with Tasking Tricore v6.3r1 compiler, with C++14 as the standard, I get the following warnings:

cptc W0111: ["path/to/st_tree/include/st_tree_nodes.h" 130] statement is unreachable
cptc W0111: ["path/to/st_tree/include/st_tree_nodes.h" 723] statement is unreachable

Culprits:

st_tree/include/st_tree_nodes.h

Line 130 in 5b00cc4

return false;

st_tree/include/st_tree_nodes.h

Line 723 in c5e184b

return r.first;

I may have a possible solution for line 130, but I don't understand the one at line 723. Any ideas?

[erikerlandson]

IIRC, both were to satisfy some version of the compiler that wanted a return value. It was 10 years ago 😀

Line 723 is probably because there is a throw right above that will always execute. Line 130 is because it's after a while(true), so it will never reach 130.

st_tree used to be backward compatible to c++98, however it now assumes >= c++11, so possibly these are no longer an issue. Maybe the warnings can be avoided with a pragma?