public void ThePowerOperatorIsLeftAssociative()
{
// There is no unique standard:
// https://codeplea.com/exponentiation-associativity-options
var parseTree = _parser.Parse("2^2^3");
var calculator = new CalculateVisitor();
parseTree.Accept(calculator);
// Left Associative
Assert.Equal(64, calculator.Result);
// Right Associative
Assert.NotEqual(256, calculator.Result);
var fullParenthesisVisitor = new FullParenthesisVisitor();
parseTree.Accept(fullParenthesisVisitor);
Assert.Equal("((2^2)^3)", fullParenthesisVisitor.Result);
var minimalParenthesisVisitor = new MinimalParenthesisVisitor();
parseTree.Accept(minimalParenthesisVisitor);
Assert.Equal("2^2^3", minimalParenthesisVisitor.Result);
}
public void ParseComplexArithmeticExampleCorrectly()
{
var parseTree = _parser.Parse("145.2/3+7-(8*45+22*(2-19))-88/8 + 17");
var calculator = new CalculateVisitor();
parseTree.Accept(calculator);
Assert.Equal(75.4, calculator.Result);
var parenthesisVisitor = new FullParenthesisVisitor();
parseTree.Accept(parenthesisVisitor);
Assert.Equal("(((((145.2/3)+7)-((8*45)+(22*(2-19))))-(88/8))+17)", parenthesisVisitor.Result);
}
public void ParseSimpleFloatCorrectly()
{
var parseTree = _parser.Parse("3.14159265");
var number = parseTree as NumberNode;
Assert.NotNull(number);
Assert.Equal(3.14159265, number?.Number);
var calculator = new CalculateVisitor();
parseTree.Accept(calculator);
Assert.Equal(3.14159265, calculator.Result);
var parenthesisVisitor = new FullParenthesisVisitor();
parseTree.Accept(parenthesisVisitor);
Assert.Equal("3.14159265", parenthesisVisitor.Result);
}
public void ParseSingleNumberCorrectly()
{
var parseTree = _parser.Parse("22");
var number = parseTree as NumberNode;
Assert.NotNull(number);
Assert.Equal(22.0, number?.Number);
var calculator = new CalculateVisitor();
parseTree.Accept(calculator);
Assert.Equal(22.0, calculator.Result);
var parenthesisVisitor = new FullParenthesisVisitor();
parseTree.Accept(parenthesisVisitor);
Assert.Equal("22", parenthesisVisitor.Result);
}
