diff --git a/Cython/Compiler/Optimize.py b/Cython/Compiler/Optimize.py index b73e115de2bb42a6bcf1587ef5c18aaea2fe2950..1b4e41b4d93263a66eecffbaa7c930b0d65b4066 100644 --- a/Cython/Compiler/Optimize.py +++ b/Cython/Compiler/Optimize.py @@ -3969,6 +3969,9 @@ class ConstantFolding(Visitor.VisitorTransform, SkipDeclarations): node = ExprNodes.UnicodeNode(node.pos, value=EncodedString('')) elif len(values) == 1: node = values[0] + elif len(values) == 2: + # reduce to string concatenation + node = ExprNodes.binop_node(node.pos, '+', *values) else: node.values = values return node