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Runtime evaluation/In an environment: Difference between revisions
Runtime evaluation/In an environment (view source)
Revision as of 12:37, 15 December 2017
, 6 years agoAdded Julia language
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(Added Julia language) |
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Line 560:
@evalwithx(:(2 ^ x), 3, 5) # quoted expression (AST)
@evalwithx("2 ^ x", 3, 5) # expression to parse (String)</lang>
One can even perform the task without using macros:
<lang julia>function evalwithx(expr::Expr, a, b)
a = eval(quote let x = $a; return $expr end end)
b = eval(quote let x = $b; return $expr end end)
return b - a
end
evalwithx(expr::String, a, b) = evalwithx(parse(expr), a, b)
evalwithx(:(2 ^ x), 3, 5)
evalwithx("2 ^ x", 3, 5)</lang>
=={{header|Kotlin}}==
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