A struct (short for "structure") is a collection of data fields with declared data types. Field tags are part of the struct's field definition and allow nice and easy way to store meta data about fields for many use cases (field mapping, data validation, ORM, etc). Parse and modify Go struct field tags. Golang tool to modify/update field tags in structs. func (Kind) String ¶ func (k Kind) String() string. Golang Custom Struct Tags Example. type MapIter struct { // contains filtered or unexported fields} func (*MapIter) Key ¶ 1.12 func (it *MapIter) Key() Value Key returns the key of the iterator's current map entry. type PodStatus struct { Status string `json: ",status"` } Contribute to fatih/structtag development by creating an account on GitHub. Golang has the ability to declare and create own data types by combining one or more types, including both built-in and user-defined types. Tags are a way to attach additional information to a struct field. Each data field in a struct is declared with a known type, which could be a built-in type or another user-defined type.
In golang while using struct tag, the spaces make a lot of difference. gomodifytags makes it easy to update, add or delete the tags in a struct field.You can easily add new tags, update existing tags (such as appending a new key, i.e: db, xml, etc..) or remove existing tags.It also allows you to add and remove tag options. See Value.MapRange.
A field declaration may be followed by an optional string literal tag, which becomes an attribute for all the fields in the corresponding field declaration. String returns the name of k. type MapIter ¶ 1.12. The Go spec in the Struct types definition defines tags as. For example look at the following code. GitHub Gist: instantly share code, notes, and snippets. An empty tag string is equivalent to an absent tag. Structs in Golang represent one of the most common variable types and used practically everywhere, from dealing with configuration options to marshaling of JSON or XML documents using encoding/json or encoding/xml packages. A MapIter is an iterator for ranging over a map.
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