pandalee99 commented on code in PR #2553:
URL: https://github.com/apache/fory/pull/2553#discussion_r2318191130


##########
go/fory/go.mod:
##########
@@ -22,5 +22,6 @@ go 1.13
 require (
        github.com/davecgh/go-spew v1.1.1 // indirect
        github.com/spaolacci/murmur3 v1.1.0
-       github.com/stretchr/testify v1.7.0
+       github.com/stretchr/testify v1.6.1

Review Comment:
   It seems that lowering the version makes no sense



##########
go/fory/codegen/forygen.go:
##########
@@ -0,0 +1,825 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package main
+
+import (
+       "bytes"
+       "crypto/md5"
+       "encoding/binary"
+       "flag"
+       "fmt"
+       "go/format"
+       "go/types"
+       "io/ioutil"
+       "log"
+       "path/filepath"
+       "sort"
+       "strings"
+       "time"
+       "unicode"
+
+       "golang.org/x/tools/go/packages"
+)
+
+var (
+       typeFlag = flag.String("type", "", "comma-separated list of types to 
generate code for")
+       pkgFlag  = flag.String("pkg", ".", "package directory to search for 
types")
+)
+
+// StructInfo contains metadata about a struct to generate code for
+type StructInfo struct {
+       Name   string
+       Fields []*FieldInfo
+}
+
+// FieldInfo contains metadata about a struct field
+type FieldInfo struct {
+       GoName        string     // Original Go field name
+       SnakeName     string     // snake_case field name for sorting
+       Type          types.Type // Go type information
+       Index         int        // Original field index in struct
+       IsPrimitive   bool       // Whether it's a Fory primitive type
+       IsPointer     bool       // Whether it's a pointer type
+       TypeID        string     // Fory TypeID for sorting
+       PrimitiveSize int        // Size for primitive type sorting
+}
+
+func main() {
+       flag.Parse()
+
+       if err := run(); err != nil {
+               log.Fatalf("forygen failed: %v", err)
+       }
+}
+
+func run() error {
+       // Load packages
+       cfg := &packages.Config{
+               Mode: packages.NeedTypes | packages.NeedSyntax | 
packages.NeedName | packages.NeedFiles | packages.NeedTypesInfo,
+       }
+
+       pkgs, err := packages.Load(cfg, *pkgFlag)
+       if err != nil {
+               return fmt.Errorf("loading packages: %w", err)
+       }
+
+       if len(pkgs) == 0 {
+               return fmt.Errorf("no packages found")
+       }
+
+       if packages.PrintErrors(pkgs) > 0 {
+               return fmt.Errorf("errors in packages")
+       }
+
+       // Process each package
+       for _, pkg := range pkgs {
+               if err := processPackage(pkg); err != nil {
+                       return fmt.Errorf("processing package %s: %w", 
pkg.PkgPath, err)
+               }
+       }
+
+       return nil
+}
+
+func processPackage(pkg *packages.Package) error {
+       // Find structs to generate code for
+       var targetTypes []string
+       if *typeFlag != "" {
+               targetTypes = strings.Split(*typeFlag, ",")
+       }
+
+       var structs []*StructInfo
+
+       // Check if package has types
+       if pkg.Types == nil {
+               return fmt.Errorf("package %s has no type information", 
pkg.PkgPath)
+       }
+
+       // Iterate through all types in the package
+       scope := pkg.Types.Scope()
+       allNames := scope.Names()
+
+       // Also check if there are any compilation errors
+       if len(pkg.Errors) > 0 {
+               for _, err := range pkg.Errors {
+                       log.Printf("package error: %s", err)
+               }
+       }
+
+       for _, name := range allNames {
+               obj := scope.Lookup(name)
+               if obj == nil {
+                       continue
+               }
+
+               // Check if it's a named type
+               named, ok := obj.Type().(*types.Named)
+               if !ok {
+                       continue
+               }
+
+               // Check if underlying type is struct
+               structType, ok := named.Underlying().(*types.Struct)
+               if !ok {
+                       continue
+               }
+
+               // Check if we should generate code for this type
+               shouldGenerate := false
+               if len(targetTypes) > 0 {
+                       for _, t := range targetTypes {
+                               if strings.TrimSpace(t) == name {
+                                       shouldGenerate = true
+                                       break
+                               }
+                       }
+               } else {
+                       // TODO: Check for fory:gen comment
+                       shouldGenerate = false
+               }
+
+               if !shouldGenerate {
+                       continue
+               }
+
+               // Extract struct information
+               structInfo, err := extractStructInfo(name, structType)
+               if err != nil {
+                       return fmt.Errorf("extracting struct info for %s: %w", 
name, err)
+               }
+
+               structs = append(structs, structInfo)
+       }
+
+       if len(structs) == 0 {
+               if len(targetTypes) > 0 {
+                       log.Printf("Warning: No matching structs found for 
target types: %v", targetTypes)
+                       log.Printf("Available types in package: %v", allNames)

Review Comment:
   Why was "log" only used in this file, and why is it not a good habit to mix 
"log" and "fmt".



##########
go/fory/codegen/forygen.go:
##########
@@ -0,0 +1,825 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package main

Review Comment:
   I still think this name is inappropriate



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