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type Field struct {
	Name       string // original Go field name
	GoType     string // e.g., string, int32, int64, time.Time, map[string]int64
	CType      string // e.g., const char*, int32_t, int64_t, double
	ExportName string // C field name (may add suffix like JSON/Unix)
}

type Func struct {
	Name       string   // Go name, e.g., Add
	CName      string   // C name without prefix, same as Name
	Params     []string // parameter names
	ParamTypes []string // Go types (int32|int64)
	HasValue   bool     // true if function returns a value before error
	RetType    string   // value type ("int32"|"int64") when HasValue=true
}

type Struct struct {
	Name   string
	Fields []Field
}