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Context

Struct Context 

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pub struct Context {
    pub values: HashMap<String, Option<String>>,
}
Expand description

Accumulated context passed through a chain of optional commands.

Each entry maps the command name to its string output (None if the command produced no output). The context is serialized to JSON and passed as the stdin input to the first non-optional command that terminates the chain.

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§values: HashMap<String, Option<String>>

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impl Context

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pub fn new() -> Self

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pub fn insert(&mut self, key: impl Into<String>, value: Option<String>)

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pub fn to_json(&self) -> String

Serialize to a minimal JSON object. Values are string-escaped but this is not a full JSON encoder — keep values simple (no embedded quotes).

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impl Default for Context

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fn default() -> Self

Returns the “default value” for a type. Read more

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.