• PHP

function foo(): void
{
    include 'foobody.txt';
}

• C

void foo()
{
#include "foobody.txt"
}

• Clojure

(def foo (load-file "foobody.txt"))

• C++

void _foo() {
#include "foobody.txt"
}

• D

void foo()
{
    mixin(import("foobody.txt"));
}

• Fortran

function foo()
include "foobody.txt"
end function foo

• Go

//go:embed foobody.txt
var s string

• JS

const foo = new Function(await readFile('foobody.txt'));

• Pascal

procedure foo;
begin
  {$I foobody.txt}
end;

• Perl

sub foo {
    do './foobody.txt';
}

• Python

foo = imp.load_module('foobody', 'foobody.txt').foo

• Ruby

def foo
  eval File.read "foobody.txt"
end

• Rust

fn main() {
    include!("foobody.txt");
}