pub struct Variable { /* private fields */ }
Expand description
Config files can define a sequence of variables that are iteratively calculated. Variables can reference other variables in their Tree, Garden, and Configuration scopes.
The config values can contain either plain values, string ${expressions} that resolve against other Variables, or exec expressions that evaluate to a command whose stdout is captured and placed into the value of the variable.
An exec expression can use shell-like ${variable} references as which are substituted when evaluating the command, just like a regular string expression. An exec expression is denoted by using a “$ “ (dollar-sign followed by space) before the value. For example, using “$ echo foo” will place the value “foo” in the variable.
Implementations
sourceimpl Variable
impl Variable
pub fn new(expr: String, value: Option<String>) -> Self
pub fn get_expr(&self) -> &String
pub fn get_expr_mut(&mut self) -> &mut String
pub fn set_expr(&mut self, expr: String)
pub fn set_value(&self, value: String)
sourcepub fn get_value(&self) -> Option<&String>
pub fn get_value(&self) -> Option<&String>
Transform the RefCell<Option
pub fn reset(&self)
Trait Implementations
Auto Trait Implementations
impl !RefUnwindSafe for Variable
impl Send for Variable
impl !Sync for Variable
impl Unpin for Variable
impl UnwindSafe for Variable
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more