oakes · October 19, 2022 13:35 · May 4, 2021
diff --git a/evaling_with_nim.md b/evaling_with_nim.md
@@ -0,0 +1,15 @@
+Did you know nim can eval itself at runtime like a frickin scripting language?
+
+Clone this gist and do...
+
+```
+nimble install compiler
+nim c -r nimeval.nim
+```
+
+...and you should see:
+
+```
+Hello, dude!
+The square of 10 is 100
+```
diff --git a/myscript.nim b/myscript.nim
@@ -0,0 +1,5 @@
+proc sayHello*(name: string) =
+  echo "Hello, " & name & "!"
+
+proc square*(n: int): int =
+  n * n
diff --git a/nimeval.nim b/nimeval.nim
@@ -0,0 +1,18 @@
+import compiler/nimeval
+from compiler/ast import nil
+import os
+
+let std = findNimStdLibCompileTime()
+let intr = createInterpreter("myscript.nim", [std, parentDir(currentSourcePath),
+  std / "pure", std / "core"])
+intr.evalScript()
+
+let helloProc = intr.selectRoutine("sayHello")
+discard intr.callRoutine(helloProc, [ast.newStrNode(ast.nkStrLit, "dude")])
+
+let squareProc = intr.selectRoutine("square")
+let n = 10
+let nSquared = intr.callRoutine(squareProc, [ast.newIntNode(ast.nkIntLit, n)]).intVal
+echo "The square of " & $n & " is " & $nSquared
+
+intr.destroyInterpreter()