Add redis parser + test

server/resp_expr.cc

@@ -0,0 +1,74 @@
+// Copyright 2021, Beeri 15.  All rights reserved.
+// Author: Roman Gershman (romange@gmail.com)
+//
+
+#include "server/resp_expr.h"
+
+#include "base/logging.h"
+
+namespace dfly {
+
+const char* RespExpr::TypeName(Type t) {
+  switch (t) {
+    case STRING:
+      return "string";
+    case INT64:
+      return "int";
+    case ARRAY:
+      return "array";
+    case NIL_ARRAY:
+      return "nil-array";
+    case NIL:
+      return "nil";
+    case ERROR:
+      return "error";
+  }
+  ABSL_INTERNAL_UNREACHABLE;
+}
+
+}  // namespace dfly
+
+namespace std {
+
+ostream& operator<<(ostream& os, const dfly::RespExpr& e) {
+  using dfly::RespExpr;
+  using dfly::ToAbsl;
+
+  switch (e.type) {
+    case RespExpr::INT64:
+      os << "i" << get<int64_t>(e.u);
+      break;
+    case RespExpr::STRING:
+      os << "'" << ToAbsl(get<RespExpr::Buffer>(e.u)) << "'";
+      break;
+    case RespExpr::NIL:
+      os << "nil";
+      break;
+    case RespExpr::NIL_ARRAY:
+      os << "[]";
+      break;
+    case RespExpr::ARRAY:
+      os << dfly::RespSpan{*get<RespExpr::Vec*>(e.u)};
+      break;
+    case RespExpr::ERROR:
+      os << "e(" << ToAbsl(get<RespExpr::Buffer>(e.u)) << ")";
+      break;
+  }
+
+  return os;
+}
+
+ostream& operator<<(ostream& os, dfly::RespSpan ras) {
+  os << "[";
+  if (!ras.empty()) {
+    for (size_t i = 0; i < ras.size() - 1; ++i) {
+      os << ras[i] << ",";
+    }
+    os << ras.back();
+  }
+  os << "]";
+
+  return os;
+}
+
+}  // namespace std