make parser public (#39)

* make parser public

* add v

* change methods to tryFrom

* correct formatting

* add next formatting

CHANGELOG.md

@@ -25,3 +25,5 @@
   * add ..*
 * **`0.2.5`**
   * build for tags  
+* **`0.2.6`**
+  * make parser mod public  

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "jsonpath-rust"
 description = "The library provides the basic functionality to find the set of the data according to the filtering query."
-version = "0.2.5"
+version = "0.2.6"
 authors = ["BorisZhguchev <zhguchev@gmail.com>"]
 edition = "2018"
 license-file = "LICENSE"

src/lib.rs

@@ -116,11 +116,12 @@ use crate::parser::model::JsonPath;
 use crate::parser::parser::parse_json_path;
 use crate::path::{json_path_instance, PathInstance};
 use serde_json::Value;
+use std::convert::TryInto;
 use std::fmt::Debug;
 use std::str::FromStr;
 
-mod parser;
-mod path;
+pub mod parser;
+pub mod path;
 
 #[macro_use]
 extern crate pest_derive;
@@ -169,7 +170,9 @@ impl FromStr for JsonPathInst {
     type Err = String;
 
     fn from_str(s: &str) -> Result<Self, Self::Err> {
-        JsonPath::from_str(s).map(|inner| JsonPathInst { inner })
+        Ok(JsonPathInst {
+            inner: s.try_into()?,
+        })
     }
 }
 

src/parser/mod.rs

@@ -2,6 +2,6 @@
 //! The module grammar denotes the structure of the parsing grammar
 
 mod macros;
-pub(crate) mod model;
+pub mod model;
 #[allow(clippy::module_inception)]
-pub(crate) mod parser;
+pub mod parser;

src/parser/model.rs

@@ -1,5 +1,6 @@
 use crate::parse_json_path;
 use serde_json::Value;
+use std::convert::TryFrom;
 
 /// The basic structures for parsing json paths.
 /// The common logic of the structures pursues to correspond the internal parsing structure.
@@ -27,12 +28,14 @@ pub enum JsonPath {
     Fn(Function),
 }
 
-impl JsonPath {
-    /// allows to create an JsonPath from string
-    pub fn from_str(v: &str) -> Result<JsonPath, String> {
-        parse_json_path(v).map_err(|e| e.to_string())
+impl TryFrom<&str> for JsonPath {
+    type Error = String;
+
+    fn try_from(value: &str) -> Result<Self, Self::Error> {
+        parse_json_path(value).map_err(|e| e.to_string())
     }
 }
+
 #[derive(Debug, PartialEq, Clone)]
 pub enum Function {
     /// length()