99 lines
2.3 KiB
Rust
99 lines
2.3 KiB
Rust
use std::fmt;
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/// An immutable JSON source path.
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#[derive(Default, Clone, Debug, PartialEq)]
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pub struct Path(pub String);
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impl Path {
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/// Creates an empty JSON source path.
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///
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/// # Examples
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///
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/// Basic usage
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///
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/// ```rust
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/// # use gltf_json::Path;
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/// let path = Path::new();
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/// assert_eq!("", path.as_str());
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/// ```
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pub fn new() -> Self {
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Path(String::new())
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}
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/// Returns a new path ending with the given field.
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///
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/// # Examples
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///
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/// Basic usage
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///
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/// ```rust
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/// # use gltf_json::Path;
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/// let path = Path::new().field("foo");
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/// assert_eq!("foo", path.as_str());
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/// assert_eq!("foo.bar", path.field("bar").as_str());
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/// ```
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pub fn field(&self, name: &str) -> Self {
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if self.0.is_empty() {
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Path(name.to_string())
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} else {
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Path(format!("{}.{}", self.0, name))
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}
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}
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/// Returns a new path ending with the given array index.
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///
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/// # Examples
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///
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/// Basic usage
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///
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/// ```rust
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/// # use gltf_json::Path;
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/// let path = Path::new().field("foo");
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/// assert_eq!("foo[123]", path.index(123).as_str());
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/// ```
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pub fn index(&self, index: usize) -> Self {
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Path(format!("{}[{}]", self.0, index))
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}
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/// Returns a new path ending with the given object key.
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///
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/// # Examples
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///
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/// Basic usage
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///
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/// ```rust
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/// # use gltf_json::Path;
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/// let path = Path::new().field("foo");
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/// assert_eq!("foo[\"bar\"]", path.key("bar").as_str());
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/// ```
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pub fn key(&self, key: &str) -> Self {
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Path(format!("{}[\"{}\"]", self.0, key))
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}
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/// Provides a string value for a JSON path.
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///
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/// # Examples
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///
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/// Basic usage
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///
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/// ```rust
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/// # use gltf_json::Path;
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/// let path = Path::new().field("foo").index(0).value_str("baz");
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/// assert_eq!("foo[0] = \"baz\"", path.as_str());
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/// ```
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pub fn value_str(&self, value: &str) -> Self {
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Path(format!("{} = \"{}\"", self.0, value))
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}
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/// Returns a view into the internal representation.
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pub fn as_str(&self) -> &str {
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&self.0
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}
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}
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impl fmt::Display for Path {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}", self.0)
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}
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}
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