fixes nim-lang#21027; cast expressions need a type (nim-lang#21029)

* fixes nim-lang#21027; cast expressions need a type * Apply suggestions from code review Thanks to @beef331
survivorm · Feb 28, 2023 · 7e019a0 · 7e019a0
1 parent dcf104c
commit 7e019a0
Show file tree

Hide file tree

Showing 2 changed files with 7 additions and 0 deletions.
diff --git a/compiler/semexprs.nim b/compiler/semexprs.nim
@@ -394,6 +394,8 @@ proc semCast(c: PContext, n: PNode): PNode =
   let castedExpr = semExprWithType(c, n[1])
   if castedExpr.kind == nkClosedSymChoice:
     errorUseQualifier(c, n[1].info, castedExpr)
+  if targetType == nil:
+    localError(c.config, n.info, "Invalid usage of cast, cast requires a type to convert to, e.g., cast[int](0d).")
   if tfHasMeta in targetType.flags:
     localError(c.config, n[0].info, "cannot cast to a non concrete type: '$1'" % $targetType)
   if not isCastable(c, targetType, castedExpr.typ, n.info):

diff --git a/tests/types/t21027.nim b/tests/types/t21027.nim
@@ -0,0 +1,5 @@
+discard """
+  errormsg: "Invalid usage of cast, cast requires a type to convert to, e.g., cast[int](0d)."
+"""
+# bug #21027
+let x: uint64 = cast(5)