asya/toml-rs
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Implement Value::lookup for empty path to return self

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This commit is contained in:
Kerhong 2015-09-25 19:26:47 +03:00
parent bb12015a8a
commit 547e202c15
1 changed files with 20 additions and 0 deletions
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20
src/lib.rs
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@ -155,6 +155,8 @@ impl Value {
/// ///
/// Note: arrays have zero-based indexes. /// Note: arrays have zero-based indexes.
/// ///
/// Note: empty path returns self.
///
/// ``` /// ```
/// # #![allow(unstable)] /// # #![allow(unstable)]
/// let toml = r#" /// let toml = r#"
@ -180,6 +182,10 @@ impl Value {
/// ``` /// ```
pub fn lookup<'a>(&'a self, path: &'a str) -> Option<&'a Value> { pub fn lookup<'a>(&'a self, path: &'a str) -> Option<&'a Value> {
let mut cur_value = self; let mut cur_value = self;
if path.len() == 0 {
return Some(cur_value)
}
for key in path.split('.') { for key in path.split('.') {
match cur_value { match cur_value {
&Value::Table(ref hm) => { &Value::Table(ref hm) => {
@ -260,4 +266,18 @@ mod tests {
let foo = value.lookup("values.str.foo"); let foo = value.lookup("values.str.foo");
assert!(foo.is_none()); assert!(foo.is_none());
} }
#[test]
fn lookup_self() {
let value: Value = r#"foo = "bar""#.parse().unwrap();
let foo = value.lookup("foo").unwrap();
assert_eq!(foo.as_str().unwrap(), "bar");
let foo = value.lookup("").unwrap();
assert!(foo.as_table().is_some());
let baz = foo.lookup("foo").unwrap();
assert_eq!(baz.as_str().unwrap(), "bar");
}
} }