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Misc. fixes and improvements for unused assignment detection

3

**What this PR does / why we need it**: This PR does the following: * Introduces warning 252 for operators `++`, `--`, and compound assignment operators (`+=`, `-=`, `*=` etc,)...

Daniel-Cortez

Remove `-Z`

1

### Issue description: `-Z` was added to fix one single breaking change, namely that of `_inc_` auto-generated include guards. However, the need for this is long past; includes have been...

Y-Less

`fatal error 111: user error:` seems redundant

1

### Issue description: IMHO it should just read `user error:` like a fourth class of errors, but still fatal. The long prefix just obfuscates the message. ### Minimal complete verifiable...

Y-Less

Copying from enum array generates incorrect code

1

### Issue description: When an enum contains an array (including but not limited to another enum), copying from this array to either a normal array or an array inside another...

IS4Code

Incorrect division of integers in special cases

1

### Issue description: I don’t know exactly how it is related is for the compiler or not. If you divide one INTEGER number by another INTEGER, then in some cases...

MuthaX

`tagof` default vars incredibly fragile

2

### Issue description: ### Minimal complete verifiable example (MCVE): This works (`tag` is `tagof (b:)`): ```pawn Func({a, b, c}:arg, tag = tagof (arg)) { } main() { Func(b:0); } ```...

Y-Less

Referencing a following parameter in a complex sizeof/tagof default parameter expression

5

A *simple* `sizeof`/`tagof` expression works when referencing a parameter at the same or greater position, i.e.: ```pawn native n1(tag = tagof(val), {_,Float}:val); // works native n2(size = sizeof(val), val[]); //...

IS4Code

`sizeof` default arg with offsets

1

### Issue description: `sizeof` when used as a default argument to get the size of an array should always return a size of an array, never the size of a...

Y-Less

Compat mode include guards don't work.

1

### Issue description: The `_inc_file` automatic include guards don't seem to prevent including files any mode ### Minimal complete verifiable example (MCVE): ```pawn #pragma compat 1 #define _inc_console #include main()...

Y-Less

tag mismatch when assigning the 2d variable directly.

2

### Issue description: Me, Cheaterman, and $Michael$ discussed about pawn and encountered the bug that should not happen when trying to assigning the `enum tag` for global 2d array, since...

Se8870