Make view and pure functions virtual (#2473)

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>
2021-01-26 17:23:23 +01:00
parent 0931062a3f
commit 18c7efe800
24 changed files with 122 additions and 112 deletions
--- a/contracts/proxy/UpgradeableProxy.sol
+++ b/contracts/proxy/UpgradeableProxy.sol
@ -44,7 +44,7 @@ contract UpgradeableProxy is Proxy {
    /**
     * @dev Returns the current implementation address.
     */
-    function _implementation() internal view override returns (address impl) {
+    function _implementation() internal view virtual override returns (address impl) {
        bytes32 slot = _IMPLEMENTATION_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {