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-rw-r--r--compiler/semexprs.nim4
1 files changed, 4 insertions, 0 deletions
diff --git a/compiler/semexprs.nim b/compiler/semexprs.nim
index 03730f30c..fba028a46 100644
--- a/compiler/semexprs.nim
+++ b/compiler/semexprs.nim
@@ -1441,6 +1441,10 @@ proc semMagic(c: PContext, n: PNode, s: PSym, flags: TExprFlags): PNode =
   of mShallowCopy: result = semShallowCopy(c, n, flags)
   of mExpandToAst: result = semExpandToAst(c, n, s, flags)
   of mQuoteAst: result = semQuoteAst(c, n)
+  of mAstToStr:
+    checkSonsLen(n, 2)
+    result = newStrNodeT(renderTree(n[1], {renderNoComments}), n)
+    result.typ = getSysType(tyString)
   else: result = semDirectOp(c, n, flags)
 
 proc semWhen(c: PContext, n: PNode, semCheck = true): PNode =