1 files changed, 15 insertions, 0 deletions
diff --git a/lib/system/indexerrors.nim b/lib/system/indexerrors.nim
new file mode 100644
index 000000000..6a8cb8a0a
--- /dev/null
+++ b/lib/system/indexerrors.nim
@@ -0,0 +1,15 @@
+# imported by other modules, unlike helpers.nim which is included
+# xxx this is now included instead of imported, we should import instead
+
+template formatErrorIndexBound*[T](i, a, b: T): string =
+  when defined(standalone):
+    "indexOutOfBounds"
+  else:
+    if b < a: "index out of bounds, the container is empty"
+    else: "index " & $i & " not in " & $a & " .. " & $b
+
+template formatErrorIndexBound*[T](i, n: T): string =
+  formatErrorIndexBound(i, 0, n)
+
+template formatFieldDefect*(f, discVal): string =
+  f & discVal & "'"