fix: remove all constexpr

Signed-off-by: syaojun <libevent@yeah.net>

Author: SYaoJun

cpp/src/graphar/status.h

@@ -233,31 +233,31 @@ class Status {
   }
 
   /** Return true iff the status indicates success. */
-  constexpr bool ok() const { return (state_.get() == nullptr); }
+  bool ok() const { return (state_.get() == nullptr); }
 
   /** Return true iff the status indicates a key lookup error. */
-  constexpr bool IsKeyError() const { return code() == StatusCode::kKeyError; }
+  bool IsKeyError() const { return code() == StatusCode::kKeyError; }
   /** Return true iff the status indicates a type match error. */
-  constexpr bool IsTypeError() const {
+  bool IsTypeError() const {
     return code() == StatusCode::kTypeError;
   }
   /** Return true iff the status indicates invalid data. */
-  constexpr bool IsInvalid() const { return code() == StatusCode::kInvalid; }
+  bool IsInvalid() const { return code() == StatusCode::kInvalid; }
   /** Return true iff the status indicates an index out of bounds. */
-  constexpr bool IsIndexError() const {
+  bool IsIndexError() const {
     return code() == StatusCode::kIndexError;
   }
   /** Return true iff the status indicates an yaml parse related failure. */
-  constexpr bool IsYamlError() const {
+  bool IsYamlError() const {
     return code() == StatusCode::kYamlError;
   }
   /** Return true iff the status indicates an arrow-related failure. */
-  constexpr bool IsArrowError() const {
+  bool IsArrowError() const {
     return code() == StatusCode::kArrowError;
   }
 
   /** Return the StatusCode value attached to this status. */
-  constexpr StatusCode code() const {
+  StatusCode code() const {
     return ok() ? StatusCode::kOK : state_->code;
   }