fixed __wrap and __throw

[jbcaillau]

Quotations (= quote ... end) that defined local variables need these variables to be explicitly declared as local (local):

julia> foo() = quote
              try 0 + [ 0 ]
              catch a println(a) end
              end
foo (generic function with 1 method)

julia> eval(foo())
MethodError(+, (0, [0]), 0x0000000000007aef)

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

julia> a = 1
1

julia> eval(foo())
┌ Warning: Assignment to `a` in soft scope is ambiguous because a global variable by the same name exists: `a` will be treated as a new local. Disambiguate by using `local a` to suppress this warning or `global a` to assign to the existing global variable.
└ @ REPL[1]:2
MethodError(+, (0, [0]), 0x0000000000007aef)

julia> a
1

julia> foo() = quote local a
              try 0 + [ 0 ]
              catch a println(a) end
              end
foo (generic function with 1 method)

julia> eval(foo())
MethodError(+, (0, [0]), 0x0000000000007af0)

julia> a
1

NB. Also note the semantics of try ... catch depending on whether the variable exists or not in the global scope:

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

julia> try 0 + [ 0 ]
       catch b
       println(b)
       end
MethodError(+, (0, [0]), 0x0000000000007af0)

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

julia> b = 1
1

julia> try 0 + [ 0 ]
       catch b
       println(b)
       end
MethodError(+, (0, [0]), 0x0000000000007af0)

julia> b
MethodError(+, (0, [0]), 0x0000000000007af0)

[jbcaillau]

@ocots test passed, this one is for you 🙂

[ocots]

👌