Method addExpression

src/binder/binder_scope.cpp:6–10

namespace binder {

void BinderScope::addExpression(const std::string& varName,
    std::shared_ptr<Expression> expression) {
    nameToExprIdx.insert({varName, expressions.size()});
    expressions.push_back(std::move(expression));
}

void BinderScope::replaceExpression(const std::string& oldName, const std::string& newName,
    std::shared_ptr<Expression> expression) {