added when statement (#6759)

lib/system/sysstr.nim

@@ -322,37 +322,40 @@ proc nimIntToStr(x: int): string {.compilerRtl.} =
   result.add x
 
 proc add*(result: var string; x: float) =
-  var buf: array[0..64, char]
-  when defined(nimNoArrayToCstringConversion):
-    var n: int = c_sprintf(addr buf, "%.16g", x)
+  when nimvm:
+    result.add $x
   else:
-    var n: int = c_sprintf(buf, "%.16g", x)
-  var hasDot = false
-  for i in 0..n-1:
-    if buf[i] == ',':
-      buf[i] = '.'
-      hasDot = true
-    elif buf[i] in {'a'..'z', 'A'..'Z', '.'}:
-      hasDot = true
-  if not hasDot:
-    buf[n] = '.'
-    buf[n+1] = '0'
-    buf[n+2] = '\0'
-  # On Windows nice numbers like '1.#INF', '-1.#INF' or '1.#NAN'
-  # of '-1.#IND' are produced.
-  # We want to get rid of these here:
-  if buf[n-1] in {'n', 'N', 'D', 'd'}:
-    result.add "nan"
-  elif buf[n-1] == 'F':
-    if buf[0] == '-':
-      result.add "-inf"
+    var buf: array[0..64, char]
+    when defined(nimNoArrayToCstringConversion):
+      var n: int = c_sprintf(addr buf, "%.16g", x)
     else:
-      result.add "inf"
-  else:
-    var i = 0
-    while buf[i] != '\0':
-      result.add buf[i]
-      inc i
+      var n: int = c_sprintf(buf, "%.16g", x)
+    var hasDot = false
+    for i in 0..n-1:
+      if buf[i] == ',':
+        buf[i] = '.'
+        hasDot = true
+      elif buf[i] in {'a'..'z', 'A'..'Z', '.'}:
+        hasDot = true
+    if not hasDot:
+      buf[n] = '.'
+      buf[n+1] = '0'
+      buf[n+2] = '\0'
+    # On Windows nice numbers like '1.#INF', '-1.#INF' or '1.#NAN'
+    # of '-1.#IND' are produced.
+    # We want to get rid of these here:
+    if buf[n-1] in {'n', 'N', 'D', 'd'}:
+      result.add "nan"
+    elif buf[n-1] == 'F':
+      if buf[0] == '-':
+        result.add "-inf"
+      else:
+        result.add "inf"
+    else:
+      var i = 0
+      while buf[i] != '\0':
+        result.add buf[i]
+        inc i
 
 proc nimFloatToStr(f: float): string {.compilerproc.} =
   result = newStringOfCap(8)