hard-xml

基于xmlparser的强类型XML。

这是对 https://github.com/PoiScript/strong-xml 的分支，因为它已经不再维护。

快速开始

cargo add hard-xml

use std::borrow::Cow;
use hard_xml::{XmlRead, XmlWrite};

#[derive(XmlWrite, XmlRead, PartialEq, Debug)]
#[xml(tag = "parent")]
struct Parent<'a> {
    #[xml(attr = "attr1")]
    attr1: Cow<'a, str>,
    #[xml(attr = "attr2")]
    attr2: Option<Cow<'a, str>>,
    #[xml(child = "child")]
    child: Vec<Child<'a>>,
}

#[derive(XmlWrite, XmlRead, PartialEq, Debug)]
#[xml(tag = "child")]
struct Child<'a> {
    #[xml(text)]
    text: Cow<'a, str>,
}

assert_eq!(
    (Parent { attr1: "val".into(), attr2: None, child: vec![] }).to_string().unwrap(),
    r#"<parent attr1="val"/>"#
);

assert_eq!(
    Parent::from_str(r#"<parent attr1="val" attr2="val"><child></child></parent>"#).unwrap(),
    Parent { attr1: "val".into(), attr2: Some("val".into()), child: vec![Child { text: "".into() }] }
);

属性

#[xml(tag= "")]

指定结构体或枚举变体的XML标签。

#[derive(XmlWrite, XmlRead, PartialEq, Debug)]
#[xml(tag = "parent")]
struct Parent {}

assert_eq!(
    (Parent {}).to_string().unwrap(),
    r#"<parent/>"#
);

assert_eq!(
    Parent::from_str(r#"<parent/>"#).unwrap(),
    Parent {}
);

#[derive(XmlWrite, XmlRead, PartialEq, Debug)]
#[xml(tag = "tag1")]
struct Tag1 {}

#[derive(XmlWrite, XmlRead, PartialEq, Debug)]
#[xml(tag = "tag2")]
struct Tag2 {}

#[derive(XmlWrite, XmlRead, PartialEq, Debug)]
enum Tag {
    #[xml(tag = "tag1")]
    Tag1(Tag1),
    #[xml(tag = "tag2")]
    Tag2(Tag2),
}

assert_eq!(
    (Tag::Tag1(Tag1 {})).to_string().unwrap(),
    r#"<tag1/>"#
);

assert_eq!(
    Tag::from_str(r#"<tag2></tag2>"#).unwrap(),
    Tag::Tag2(Tag2 {})
);

#[xml(attr= "")]

指定结构体字段是属性。支持 Cow<str>，Option<Cow<str>>，T 和 Option<T> 其中 T: FromStr + Display。

use hard_xml::{XmlRead, XmlWrite};

#[derive(XmlWrite, XmlRead, PartialEq, Debug)]
#[xml(tag = "parent")]
struct Parent {
    #[xml(attr = "attr")]
    attr: usize
}

assert_eq!(
    (Parent { attr: 42 }).to_string().unwrap(),
    r#"<parent attr="42"/>"#
);

assert_eq!(
    Parent::from_str(r#"<parent attr="48"></parent>"#).unwrap(),
    Parent { attr: 48 }
);

#[xml(child= "")]

指定结构体字段是一个子元素。支持 T，Option<T>，Vec<T> 其中 T: XmlRead + XmlWrite。

use hard_xml::{XmlRead, XmlWrite};

#[derive(XmlWrite, XmlRead, PartialEq, Debug)]
#[xml(tag = "tag1")]
struct Tag1 {}

#[derive(XmlWrite, XmlRead, PartialEq, Debug)]
#[xml(tag = "tag2")]
struct Tag2 {}

#[derive(XmlWrite, XmlRead, PartialEq, Debug)]
#[xml(tag = "tag3")]
struct Tag3 {}

#[derive(XmlWrite, XmlRead, PartialEq, Debug)]
enum Tag12 {
    #[xml(tag = "tag1")]
    Tag1(Tag1),
    #[xml(tag = "tag2")]
    Tag2(Tag2),
}

#[derive(XmlWrite, XmlRead, PartialEq, Debug)]
#[xml(tag = "parent")]
struct Parent {
    #[xml(child = "tag3")]
    tag3: Vec<Tag3>,
    #[xml(child = "tag1", child = "tag2")]
    tag12: Option<Tag12>
}

assert_eq!(
    (Parent { tag3: vec![Tag3 {}], tag12: None }).to_string().unwrap(),
    r#"<parent><tag3/></parent>"#
);

assert_eq!(
    Parent::from_str(r#"<parent><tag2></tag2></parent>"#).unwrap(),
    Parent { tag3: vec![], tag12: Some(Tag12::Tag2(Tag2 {})) }
);

#[xml(text)]

指定结构体字段是文本内容。支持 Cow<str>，Vec<Cow<str>>，Option<Cow<str>>，T，Vec<T>，Option<T> 其中 T: FromStr + Display。

use std::borrow::Cow;
use hard_xml::{XmlRead, XmlWrite};

#[derive(XmlWrite, XmlRead, PartialEq, Debug)]
#[xml(tag = "parent")]
struct Parent<'a> {
    #[xml(text)]
    content: Cow<'a, str>,
}

assert_eq!(
    (Parent { content: "content".into() }).to_string().unwrap(),
    r#"<parent>content</parent>"#
);

assert_eq!(
    Parent::from_str(r#"<parent></parent>"#).unwrap(),
    Parent { content: "".into() }
);

use std::borrow::Cow;
use hard_xml::{XmlRead, XmlWrite};

#[derive(XmlWrite, XmlRead, PartialEq, Debug)]
#[xml(tag = "parent")]
struct Parent<'a> {
    #[xml(flatten_text = "child")]
    content: Cow<'a, str>,
}

assert_eq!(
    (Parent { content: "content".into() }).to_string().unwrap(),
    r#"<parent><child>content</child></parent>"#
);

assert_eq!(
    Parent::from_str(r#"<parent><child></child></parent>"#).unwrap(),
    Parent { content: "".into() }
);

use std::borrow::Cow;
use hard_xml::{XmlRead, XmlWrite};

#[derive(XmlWrite, XmlRead, PartialEq, Debug)]
#[xml(tag = "parent")]
struct Parent<'a> {
    #[xml(text, cdata)]
    content: Cow<'a, str>,
}

assert_eq!(
    (Parent { content: "content".into() }).to_string().unwrap(),
    r#"<parent><![CDATA[content]]></parent>"#
);

use std::borrow::Cow;
use hard_xml::{XmlRead, XmlWrite};

#[derive(XmlWrite, XmlRead, PartialEq, Debug)]
#[xml(tag = "parent")]
struct Parent<'a> {
    #[xml(flatten_text = "code", cdata)]
    content: Cow<'a, str>,
}

assert_eq!(
    (Parent { content: r#"hello("deities!");"#.into() }).to_string().unwrap(),
    r#"<parent><code><![CDATA[hello("deities!");]]></code></parent>"#
);

use std::borrow::Cow;
use hard_xml::XmlRead;

#[derive(XmlRead, PartialEq, Debug)]
#[xml(tag = "root")]
struct Root {
    #[xml(default, attr = "attr")]
    attr: bool,
}

assert_eq!(
    Root::from_str(r#"<root/>"#).unwrap(),
    Root { attr: false }
);

assert_eq!(
    Root::from_str(r#"<root attr="1"/>"#).unwrap(),
    Root { attr: true }
);