Class Left

Namespace

Albatross.Expression.Prefix

Assembly

Albatross.Expression.dll

Prefix operation that return the substring of the input text with the specified length and start index of 0

Operand Count: 2

Operands

1. input: string
2. count: double

Output Type: string

Usage: Left("test", 1) should return "t"

public class Left : PrefixExpression, IPrefixExpression, IExpression, IToken

Inheritance

object

PrefixExpression

Left

Implements

IPrefixExpression

IExpression

IToken

Inherited Members

PrefixExpression.Name

PrefixExpression.Token

PrefixExpression.MinOperandCount

PrefixExpression.MaxOperandCount

PrefixExpression.Operands

PrefixExpression.Text()

PrefixExpression.Eval(Func<string, object>)

PrefixExpression.EvalAsync(Func<string, Task<object>>)

PrefixExpression.ValidateOperands()

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Extension Methods

PrefixExpressionExtensions.GetRequiredStringValue(IPrefixExpression, int, Func<string, object>)

PrefixExpressionExtensions.GetRequiredStringValueAsync(IPrefixExpression, int, Func<string, Task<object>>)

PrefixExpressionExtensions.GetStringValue(IPrefixExpression, int, Func<string, object>)

PrefixExpressionExtensions.GetStringValueAsync(IPrefixExpression, int, Func<string, Task<object>>)

PrefixExpressionExtensions.GetValue(IPrefixExpression, int, Func<string, object>)

PrefixExpressionExtensions.GetValueAsync(IPrefixExpression, int, Func<string, Task<object>>)

PrefixExpressionExtensions.GetValues(IPrefixExpression, Func<string, object>)

PrefixExpressionExtensions.GetValuesAsync(IPrefixExpression, Func<string, Task<object>>)

ControlTokenExtensions.IsComma(IToken)

ControlTokenExtensions.IsFuncParamStart(IToken, bool)

ControlTokenExtensions.IsLeftParenthesis(IToken, bool)

ControlTokenExtensions.IsRightParenthesis(IToken)

Extensions.ConvertToBoolean(object)

Extensions.ConvertToDateTime(object)

Extensions.ConvertToDouble(object)

Extensions.ConvertToInt(object)

Extensions.ConvertToJsonElement(object)

Extensions.ConvertToString(object)

Constructors

Left()

public Left()

Methods

Run(List<object>)

Executes the prefix function with the evaluated operand values. Derived classes should override this method to implement specific function logic.

protected override object Run(List<object> operands)

Parameters

operands List<object>

The list of evaluated operand values.

Returns

object

The result of the function.