Function setLeftType

test/fixtures/snapshot/typescript.js:78978–78980

(state, type)

                return state.typeStack[state.stackIndex];
            }
            function setLeftType(state, type) {
                state.typeStack[state.stackIndex] = type;
            }
            function getLastResult(state) {
                return state.typeStack[state.stackIndex + 1];
            }