This is not a behavior of `begin` blocks but of top-level expressions.
Each top-level expression is wrapped in a "soft scope" that can have
its own locals but allows globals to leak in:
julia> a = 0
0
julia> begin
local x = 1
a = 2
end
2
julia> a
2
julia> x
ERROR: x not defined
On Mon, Dec 8, 2014 at 12:02 PM, Simon Byrne <[email protected]> wrote:
> So begin blocks can introduce a scope, they just don't by default?
>
> In your `local t = 1; t` example: what, then, is the scope of t?
>
>
> On Monday, 8 December 2014 16:56:24 UTC, Isaiah wrote:
>>
>> tmp is declared local to the begin blocks
>> if that sounds odd (it did to me at first), try typing `local t = 1; t`)
>>
>> On Mon, Dec 8, 2014 at 6:11 AM, Simon Byrne <[email protected]> wrote:
>>>
>>> According to the docs, begin blocks do not introduce new scope blocks.
>>> But this block:
>>>
>>>
>>> https://github.com/JuliaLang/julia/blob/1b9041ce2919f2976ec726372b49201c887398d7/base/string.jl#L1601-L1618
>>>
>>> does seem to introduce a new scope (i.e. if I type Base.tmp at the REPL,
>>> I get an error). What am I missing here?
>>>
>>> Simon
>>
>>
>
