CODEWITHSUNDEEP
pipejulianamed-pipesread-eval-print-loop
isebarn
isebarn

Reputation: 3940

Julia - pipe to Julia REPL

Can I pipe terminal input to a running Julia REPL?

In a terminal I might create a pipe 

mkfifo juliapipe

Inside the Julia REPL I've tried 

connect("juliapipe")

which returns the error

ERROR: connect: connection refused (ECONNREFUSED)

Is there a way to do this? Either with named pipes or any other way

Upvotes: 2

Views: 491

Answers (1)

Fengyang Wang
Fengyang Wang

Reputation: 12051

Like @DanGetz suggested, one approach would be to display(eval(parse(f))) until eof(f).

For instance, given a file test.jl:

1 + 1 

ans * 3

function f(x)
    x ^ x 
end

f(3)

println("Hello, World!")

we can in the REPL do

julia> open("test.jl") do f
           global ans
           while !eof(f)
               cmd = parse(f)
               println("file> $cmd")
               ans = eval(cmd)
               if ans !== nothing
                   display(ans)
                   println()
               end
           end
       end

file> 1 + 1
2

file> ans * 3
6

file> function f(x) # none, line 3:
    x ^ x
end
f (generic function with 1 method)

file> f(3)
27

file> println("Hello, World!")
Hello, World!

which is not quite a REPL but somewhat similar to what you're looking for.

Upvotes: 2

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