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Added variable delete command

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Mark
2023-08-02 17:37:29 -07:00
parent ef408ff181
commit da31fc43e5
2 changed files with 60 additions and 3 deletions
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11
src/context.rs
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@ -19,7 +19,6 @@ impl Context {
return Ok(());
} else { return Err(()); }
}
pub fn del_var(&mut self, s: &String) { self.variables.remove(s); }
pub fn get_variable(&self, s: &String) -> Option<Expression> {
let v: Option<&Expression>;
@ -31,6 +30,12 @@ impl Context {
if v.is_some() { Some(v.unwrap().clone()) } else { None }
}
pub fn delete_variable(&mut self, s: &String) -> Result<(), ()> {
if !self.is_varible(s) { return Err(()) };
self.variables.remove(s);
return Ok(());
}
pub fn valid_varible(&self, s: &str) -> bool {
return match s {
"ans" => false,
@ -38,6 +43,10 @@ impl Context {
}
}
pub fn is_varible(&self, s: &str) -> bool {
return self.valid_varible(s) && self.variables.contains_key(s);
}
pub fn get_variables(&self) -> &HashMap<String, Expression> {
return &self.variables
}