Bug Fix

• Fix bug for operator mapping not replacing "!abc" to "NOT abc" when there is no preceding white space

Operator Mapping

Support operator mapping.

Example:

ExpressionEvaluator.SetOperatorMap(new Dictionary<string, string>
{
    {"+", "plus"},
    {"*", "times"},
    {"/", "divideBy"},
});

// Returns 6
int result = ExpressionEvaluator.Evaluate<int>("(1 plus 2) times 2");

Initial Release

ExpressionEvaluator

Simple expression evaluator for C#

Getting Started

1. Install via nuget: ExpressionEvaluatorCs https://www.nuget.org/packages/ExpressionEvaluatorCs/
2. Sample code

// Returns 6
object result1 = ExpressionEvaluator.Evaluate("(1 + 2) * 2");

// Returns false
object result2 = ExpressionEvaluator.Evaluate("false and true");

.NET Support

• Current Release: .NET Framework 4
• Future release: .NET Core (.NET Standard Library)

Expression Support

• And
• False
• Not
• Or
• True

Operator Support

• <
• >
• <=
• >=
• <>
• =
• +
• -
• *
• /
• %

Options

Specify Return Type

Sample code

// Returns 6
int result1 = ExpressionEvaluator.Evaluate<int>("(1 + 2) * 2");

// Returns false
bool result2 = ExpressionEvaluator.Evaluate<bool>("false and true");

Specify Operator Mapping

TBD