From b3d9f2053b2e60d8a0fa04f01e496dd64cc2406b Mon Sep 17 00:00:00 2001
From: tserg <8017125+tserg@users.noreply.github.com>
Date: Fri, 29 Dec 2023 16:04:57 +0800
Subject: [PATCH] remove _is_prefoldable

---
 vyper/ast/nodes.py                        |  9 ---------
 vyper/semantics/analysis/pre_typecheck.py | 13 ++++++-------
 2 files changed, 6 insertions(+), 16 deletions(-)

diff --git a/vyper/ast/nodes.py b/vyper/ast/nodes.py
index 5712cb8f2b..209816247e 100644
--- a/vyper/ast/nodes.py
+++ b/vyper/ast/nodes.py
@@ -225,8 +225,6 @@ class VyperNode:
     _description : str, optional
         A human-readable description of the node. Used to give more verbose error
         messages.
-    _is_prefoldable : str, optional
-        If `True`, indicates that pre-folding should be attempted on the node.
     _only_empty_fields : Tuple, optional
         Field names that, if present, must be set to None or a `SyntaxException`
         is raised. This attribute is used to exclude syntax that is valid in Python
@@ -924,7 +922,6 @@ def s(self):
 
 class List(ExprNode):
     __slots__ = ("elements",)
-    _is_prefoldable = True
     _translated_fields = {"elts": "elements"}
 
     @property
@@ -938,7 +935,6 @@ def fold(self) -> Optional[ExprNode]:
 
 class Tuple(ExprNode):
     __slots__ = ("elements",)
-    _is_prefoldable = True
     _translated_fields = {"elts": "elements"}
 
     @property
@@ -972,7 +968,6 @@ class Name(ExprNode):
 
 class UnaryOp(ExprNode):
     __slots__ = ("op", "operand")
-    _is_prefoldable = True
 
     def fold(self) -> ExprNode:
         """
@@ -1022,7 +1017,6 @@ def _op(self, value):
 
 class BinOp(ExprNode):
     __slots__ = ("left", "op", "right")
-    _is_prefoldable = True
 
     def fold(self) -> ExprNode:
         """
@@ -1172,7 +1166,6 @@ class RShift(Operator):
 
 class BoolOp(ExprNode):
     __slots__ = ("op", "values")
-    _is_prefoldable = True
 
     def fold(self) -> ExprNode:
         """
@@ -1220,7 +1213,6 @@ class Compare(ExprNode):
     """
 
     __slots__ = ("left", "op", "right")
-    _is_prefoldable = True
 
     def __init__(self, *args, **kwargs):
         if len(kwargs["ops"]) > 1 or len(kwargs["comparators"]) > 1:
@@ -1331,7 +1323,6 @@ class Attribute(ExprNode):
 
 class Subscript(ExprNode):
     __slots__ = ("slice", "value")
-    _is_prefoldable = True
 
     def fold(self) -> ExprNode:
         """
diff --git a/vyper/semantics/analysis/pre_typecheck.py b/vyper/semantics/analysis/pre_typecheck.py
index a846f354ff..b0e900a76c 100644
--- a/vyper/semantics/analysis/pre_typecheck.py
+++ b/vyper/semantics/analysis/pre_typecheck.py
@@ -69,10 +69,9 @@ def prefold(node: vy_ast.VyperNode, constants: dict[str, vy_ast.VyperNode]):
                 except UnfoldableNode:
                     pass
 
-    if getattr(node, "_is_prefoldable", None):
-        # call `get_folded_value` for its side effects and allow all
-        # exceptions other than `UnfoldableNode` to raise
-        try:
-            node.get_folded_value()
-        except UnfoldableNode:
-            pass
+    # call `get_folded_value` for its side effects and allow all
+    # exceptions other than `UnfoldableNode` to raise
+    try:
+        node.get_folded_value()
+    except UnfoldableNode:
+        pass