Description

The ExpressionCalculator class allows you to create an expression calculator.

Constructors

Constructs this class with default parameters.

public ExpressionCalculator()

Constructs this class and assigns a expression string.

public ExpressionCalculator(string expression)

• expression: string - expression string.

Properties

AutoVariables

Gets and Sets the flag to turn on auto-creation of variables for a specified expression.

public Boolean AutoVariables { get; set; }

defaultFunctions

List with default functions.

public IFunctionCollection DefaultFunctions { get; }

DefaultVariables

List with default variables.

public IVariableCollection DefaultVariables

Expression

Expression string.

public string Expression { get; set; }

InitialTokens

List of original expression tokens.

public IList<ExpressionToken> InitialTokens { get; }

OriginalTokens

List of expression tokens.

public IList<Token> OriginalTokens { get; set; }

ResultTokens

List of processed expression tokens.

public IList<ExpressionToken> ResultTokens { get; }

VariantOperations

Gets and sets the manager for operations on variant values.

public IVariantOperations VariantOperations { get; set; }

Instance methods

Clear

Cleans up this calculator from all data.

public void Clear()

CreateVariables

Cleans up this calculator from all data.

public void CreateVariables(IVariantOperations variables)

• variables: IVariantOperations - list of variables to be populated.

Evaluate

Evaluates this expression using default variables and functions.

public Task<Variant> EvaluateAsync()

• returns: Task<Variant> - evaluation result.

EvaluateUsingVariablesAsync

Evaluates this expression using specified variables.

public Task<Variant> EvaluateUsingVariablesAsync(IVariantOperations variables)

• variables: IVariantOperations - list of variables.
• returns: Task<Variant> - evaluation result.

EvaluateUsingVariablesAndFunctionsAsync

Evaluates this expression using specified variables and functions.

public Task<Variant> EvaluateUsingVariablesAndFunctionsAsync(IVariantOperations variables, IFunctionCollection functions)

• variables: IVariantOperations - list of variables.
• functions: IFunctionCollection - list of functions
• returns: Task<Variant> - evaluation result.