Struct qoqo_calculator::Calculator

pub struct Calculator {
    pub variables: HashMap<String, f64>,
}

Struct for parsing string expressions to floats.

Fields

variables: HashMap<String, f64>

HashMap of variables in current Calculator

Implementations

impl Calculator

pub fn new() -> Self

Create new Calculator.

pub fn set_variable(&mut self, name: &str, value: f64)

Set variable for Calculator.

Arguments

• name - Name of the variable
• value - Float value of the variable

pub fn get_variable(&self, name: &str) -> Result<f64, CalculatorError>

Get variable for Calculator.

Arguments

• name - Name of the variable

Returns

value - Result

pub fn parse_str(&self, expression: &str) -> Result<f64, CalculatorError>

Parse a string expression.

Arguments

• expression - Expression that is parsed

pub fn parse_str_assign( &mut self, expression: &str ) -> Result<f64, CalculatorError>

Parse a string expression allowing variable assignments.

Arguments

• expression - Expression that is parsed

pub fn parse_get( &self, parse_variable: CalculatorFloat ) -> Result<f64, CalculatorError>

Parse a CalculatorFloat to float.

Arguments

• parse_variable - Parsed string CalculatorFloat or returns float value

Trait Implementations

impl Clone for Calculator

fn clone(&self) -> Calculator

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Calculator

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Calculator

Define the default value of Calculator.

fn default() -> Self

Returns the “default value” for a type.