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//! A YAML 1.2 parser using greedy parsing algorithm with PEG atoms. //! //! The major purpose of this crate is to let the user build their own YAML reader / builder / validator. //! //! This parser is not ensure about YAML spec but almost functions are well-implemented. //! (test case is [here](https://github.com/KmolYuan/yaml-peg-rs/blob/main/src/tests/test.yaml)) //! //! The buffer reader has also not implemented, but the chunks can be read by sub-parsers. //! //! Function [`parse`] is used to parse YAML string into [`Node`] data structure, //! which has a data holder [`Yaml`]. //! There also has multiple thread version corresponding to [`parse_arc`], [`ArcNode`], [`ArcYaml`]. //! To get back as string, please use [`dump`] function. //! //! There are also have some macros for building [`NodeBase`] structure from Rust data. //! Especially [`node!`] / [`node_arc!`] macro, almost data can be built by the macro literally. //! //! If you went to rise your own error message, [`indicated_msg`] might be a good choice. //! //! The anchor system [`AnchorBase`] is implemented by using [`alloc::rc::Rc`] and [`alloc::sync::Arc`] as inner handler. //! Additionally, [`anchors!`] macro can used to create anchor visitor by yourself. #![no_std] extern crate alloc; extern crate core; pub use crate::anchors::*; pub use crate::dumper::dump; pub use crate::indicator::*; pub use crate::node::*; pub use crate::parser::{parse, parse_arc}; pub use crate::yaml::*; /// Create [`Node`] items literally. /// /// Literals and expressions will be transformed to [`Yaml`] automatically by calling [`Into::into`]. /// /// ``` /// use yaml_peg::node; /// /// let k = "a"; /// assert_eq!(node!(k), node!("a")); /// ``` /// /// Arrays and maps can be created from this macro directly through brackets (`[]`, `{}`). /// /// ``` /// use yaml_peg::{node, yaml_array, yaml_map}; /// /// assert_eq!(node!([node!(1), node!(2)]), node!(yaml_array![node!(1), node!(2)])); /// assert_eq!(node!({node!(1) => node!(2)}), node!(yaml_map![node!(1) => node!(2)])); /// ``` /// /// The [`YamlBase::Null`] and the [`YamlBase::Null`] are also supported by the syntax: /// /// ``` /// use yaml_peg::{node, YamlBase}; /// /// assert_eq!(node!(YamlBase::Null), node!(null)); /// assert_eq!(node!(YamlBase::Anchor("x".into())), node!(*"x")); /// ``` /// /// For [`ArcNode`], please use [`node_arc!`], which has same API. #[macro_export] macro_rules! node { ([$($token:tt)*]) => { $crate::node!($crate::yaml_array![$($token)*]) }; ({$($token:tt)*}) => { $crate::node!($crate::yaml_map![$($token)*]) }; (null) => { $crate::node!($crate::Yaml::Null) }; (*$anchor:expr) => { $crate::node!($crate::Yaml::Anchor($anchor.into())) }; ($yaml:expr) => { $crate::Node::new($yaml.into(), 0, "", "") }; } /// Create [`ArcNode`] items literally. /// /// The API is same as [`node!`] macro. #[macro_export] macro_rules! node_arc { ([$($token:tt)*]) => { $crate::node_arc!($crate::yaml_array![$($token)*]) }; ({$($token:tt)*}) => { $crate::node_arc!($crate::yaml_map![$($token)*]) }; (null) => { $crate::node_arc!($crate::Yaml::Null) }; (*$anchor:expr) => { $crate::node_arc!($crate::Yaml::Anchor($anchor.into())) }; ($yaml:expr) => { $crate::ArcNode::new($yaml.into(), 0, "", "") }; } /// Create [`YamlBase::Array`] items literally. /// /// ``` /// use yaml_peg::{node, yaml_array}; /// /// yaml_array![node!("a"), node!("b"), node!("c")]; /// ``` #[macro_export] macro_rules! yaml_array { ($($token:tt)*) => { $crate::Yaml::Array(vec![$($token)*]) }; } /// Create [`YamlBase::Map`] items literally. /// /// ``` /// use yaml_peg::{node, yaml_map}; /// /// yaml_map!{ /// node!("a") => node!("b"), /// node!("c") => node!("d"), /// }; /// ``` #[macro_export] macro_rules! yaml_map { () => { $crate::Yaml::Map($crate::Map::new()) }; ($k1:expr => $v1:expr $(, $k2:expr => $v2:expr)* $(,)?) => {{ use core::iter::FromIterator; $crate::Yaml::from_iter(vec![($k1, $v1) $(, ($k2, $v2))*]) }}; } /// Create a custom anchor visitor. /// /// The anchor name should implement [`alloc::string::ToString`] trait. /// /// ``` /// use yaml_peg::{node, anchors}; /// /// let v = anchors![ /// "my-boss" => node!({node!("name") => node!("Henry")}), /// ]; /// assert_eq!(v["my-boss"]["name"], node!("Henry")); /// ``` #[macro_export] macro_rules! anchors { () => { $crate::AnchorBase::new() }; ($k1:expr => $v1:expr $(, $k2:expr => $v2:expr)* $(,)?) => {{ use core::iter::FromIterator; $crate::AnchorBase::from_iter(vec![($k1.to_string(), $v1) $(, ($k2.to_string(), $v2))*]) }}; } mod anchors; pub mod dumper; mod indicator; mod node; pub mod parser; pub mod repr; #[cfg(test)] mod tests; mod yaml;