Demonstrate @switch with multiline block

[jariji]

Closes #178

I guess the point of @switch is to make the RHS shorter when it has multiple statements.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (fb9c79a) 61.52% compared to head (934b3a7) 61.52%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #181   +/-   ##
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  Coverage   61.52%   61.52%           
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  Files          28       28           
  Lines        1627     1627           
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  Hits         1001     1001           
  Misses        626      626           

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[thautwarm]

I guess the point of @switch is to make the RHS shorter when it has multiple statements

This is 1/2 reason.

The second one is @switch pattern matching can create variables that can be accessed outside @switch itself.

julia> @switch [1, 2] begin
          @case [x, y]
       end

julia> x
1

julia> y
2

julia> @match [1, 2] begin
           [a, b] => nothing
       end

julia> a
ERROR: UndefVarError: `a` not defined

julia> b
ERROR: UndefVarError: `b` not defined

[jariji]

I see, it even says that already. I just missed it.