Constant variables are usable now

[Ph0enixKM]

• Translating constants changed from using Bash's declare -r to a regular variable due to the problem of no ability to redeclare them in inner scopes like loops and functions
• Moved tests from errors.rs to erroring/ directory to align the testing logic with tests for validity and standard library

[Ph0enixKM]

Problem

There is a huge problem with Bash variables. They behave similarly to var variables in JavaScript. This means that variables are being created in the scope of function.

Example:

local test=12
if [[ $test == "12" ]]; then
    local test=24
    echo $test # Outputs: 24
fi

echo $test # Outputs: 24

Solution

This can be resolved in two ways:

1. Creating subshells - adds a substantial overhead
2. Name mangling - requires name mangling

I think that the second solution is far better. In it's case - I will check whether the variable has been declared in a scope before and add gen_id() number to it's name. Do you agree with this approach?

[hdwalters]

Some minor suggestions, but otherwise good to go.

[mks-h]

First of all, I dislike the idea of adding /src/tests/erroring functionality in this PR, as it is out of scope. Can you separate it, pretty please?

[Ph0enixKM]

First of all, I dislike the idea of adding /src/tests/erroring functionality in this PR, as it is out of scope. Can you separate it, pretty please?

You want me to remove the tests and add them separately in the new form in a new PR? I know that it's pretty messy but it adds extra work and brings little value.

[mks-h]

Fair enough, but in the future please don't combine separate issues into a single PR.

[b1ek]

what did you exactly change to achieve the "usefulness"? the description is empty. i will not try to guess it by the diffs. please explain in the description what you have changed and why, and what is overall the thought process here

also, why are there new tests for arrays and failable functions? they seem totally irrelevant to this PR

[Ph0enixKM]

@b1ek I moved the files from errors.rs to the erroring/ directory designed for tests. And the full description is in the issue that this PR is linked to

[Ph0enixKM]

I'll write a description of what this PR does precisely

[b1ek]

lets merge