[INFO] Conversion to string

[melex750]

@krzys-h, I saw you were working on this so I'm sharing what I did a few days ago.

But first, recent changes appear to have broke these conversions:

message("" + this);      // output: "Pointer"
message("" + array);     // output: "("
message("" + position);  // output: "point("

As for this PR:
The first two commits are good, imo.
I'm not very happy with the third, but it works.

Fixes these bugs:
TEST_F(CBotUT, DISABLED_FunctionBadReturn)
Currently, you can return a string from any non-void function
and crash the game if you assign that to something other than a string.

TEST_F(CBotUT, DISABLED_BadStringAdd_Issue535)

anArray[0] = "A"; // "issue-419"

voidfunc() + "";  // crash on run

message( "" + voidfunc() ); // crash on run

aVar += ;
aVar = ;

[melex750]

~~Did it start building automatically? ~not good.~~
That was different.

[krzys-h]

Huh, it looks like the new Jenkins configuration builds PRs from outside contributors automatically and I don't even see a config option to disable it...

[melex750]

Possible solution HERE.
This looks like it might be the Jenkins plugin you were using before.

[melex750]

Sorry, I forgot to mention that this PR lets this work too:

string str;
str = 2.4; <-- expressions like this are commented-out in unit tests.
str += 4.2;

   NOTE: arithmetic and boolean operations require
   parentheses when concatenating strings.

message("" + (2+2) + "" );  without "( )"  output is "22"