Editing Eval (section)

===Lua===
In [[Lua (programming language)|Lua]] 5.1, <code>loadstring</code> compiles Lua code into an anonymous function.

Example as an expression evaluator:
<syntaxhighlight lang="lua">
loadstring("print('Hello World!')")()
</syntaxhighlight>

Example to do the evaluation in two steps:
<syntaxhighlight lang="lua">
a = 1
f = loadstring("return a + 1") -- compile the expression to an anonymous function
print(f()) -- execute (and print the result '2')
</syntaxhighlight>

Lua 5.2 deprecates <code>loadstring</code> in favor of the existing <code>load</code> function, which has been augmented to accept strings. In addition, it allows providing the function's environment directly, as environments are now [[closure (computer science)|upvalues]].
<syntaxhighlight lang="lua">
load("print('Hello ' .. a)", "", "t", { a = "World!", print = print })()
</syntaxhighlight>