added tests/tclosure2

tests/run/tclosure2.nim

@@ -0,0 +1,78 @@
+discard """
+  output: '''1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+11
+py
+py
+py
+py'''
+"""
+
+when true:
+  proc ax =
+    var i = 0
+    proc bx =
+      if i > 10: return
+      i += 1
+      for j in 0 .. 0: echo i
+      bx()
+    
+    bx()
+
+  ax()
+
+when true:
+  proc accumulator(start: int): (proc(): int {.closure.}) =
+    var x = start-1
+    #let dummy = proc =
+    #  discard start
+    
+    result = proc (): int = 
+      #var x = 9
+      for i in 0 .. 0: x = x + 1
+      
+      return x
+
+  var a = accumulator(3)
+  let b = accumulator(4)
+  echo a() + b() + a()
+
+
+  proc outer =
+
+    proc py() =
+      # no closure here:
+      for i in 0..3: echo "py"
+
+    py()
+    
+  outer()
+
+
+when false:
+  proc outer =
+    proc px() {.closure.} =
+      echo "px"
+
+    proc py() {.closure.} =
+      echo "py"
+
+    const
+      mapping = {
+        "abc": px,
+        "xyz": py
+      }
+    mapping[0][1]()
+
+
+  outer()
+