Struct evalexpr::HashMapContext [−][src]
pub struct HashMapContext { /* fields omitted */ }
Expand description
A context that stores its mappings in hash maps.
Value and function mappings are stored independently, meaning that there can be a function and a value with the same identifier.
This context is type-safe, meaning that an identifier that is assigned a value of some type once cannot be assigned a value of another type.
Implementations
impl HashMapContext
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impl HashMapContext
[src]Trait Implementations
impl Context for HashMapContext
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impl Context for HashMapContext
[src]fn get_value(&self, identifier: &str) -> Option<&Value>
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fn get_value(&self, identifier: &str) -> Option<&Value>
[src]Returns the value that is linked to the given identifier.
fn call_function(
&self,
identifier: &str,
argument: &Value
) -> EvalexprResult<Value>
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fn call_function(
&self,
identifier: &str,
argument: &Value
) -> EvalexprResult<Value>
[src]Calls the function that is linked to the given identifier with the given argument.
If no function with the given identifier is found, this method returns EvalexprError::FunctionIdentifierNotFound
. Read more
impl ContextWithMutableFunctions for HashMapContext
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impl ContextWithMutableFunctions for HashMapContext
[src]fn set_function(
&mut self,
identifier: String,
function: Function
) -> EvalexprResult<()>
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fn set_function(
&mut self,
identifier: String,
function: Function
) -> EvalexprResult<()>
[src]Sets the function with the given identifier to the given function.
impl Debug for HashMapContext
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impl Debug for HashMapContext
[src]impl Default for HashMapContext
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impl Default for HashMapContext
[src]fn default() -> HashMapContext
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fn default() -> HashMapContext
[src]Returns the “default value” for a type. Read more