/// <summary>
/// Generate a string that represents this Syntax element.
/// </summary>
public static string ToTextPreserveFormatting(this SyntaxBase syntax)
{
var sb = new StringBuilder();
var printVisitor = new PrintVisitor(sb);
printVisitor.Visit(syntax);
return(sb.ToString());
}
public void VisitIdentifierExpr()
{
var target = new PrintVisitor();
var expression = new IdentifierExpr("test");
var actual = target.Visit(expression, scope);
Assert.AreEqual("test", actual);
}
public void VisitIntegerConstantExpr()
{
var target = new PrintVisitor();
var expression = new ConstantExpr(1234);
var actual = target.Visit(expression, scope);
Assert.AreEqual("1234", actual);
}
public void VisitBooleanNotExpr(bool a, string expected)
{
var target = new PrintVisitor();
var aExpression = new ConstantExpr(a);
var expr = new NotExpr(aExpression);
var actual = target.Visit(expr, scope);
Assert.AreEqual(expected, actual);
}
public void VisitDivExpr()
{
var target = new PrintVisitor();
var lhs = new ConstantExpr(1);
var rhs = new ConstantExpr(2);
var expression = new DivExpr(lhs, rhs);
var actual = target.Visit(expression, scope);
Assert.AreEqual("1/2", actual);
}
public void VisitBooleanOrExpr(object a, object b, string expected)
{
var target = new PrintVisitor();
var aExpression = new ConstantExpr(a);
var bExpression = new ConstantExpr(b);
var expr = new OrExpr(aExpression, bExpression);
var actual = target.Visit(expr, scope);
Assert.AreEqual(expected, actual);
}
private static void GrammarParsingTest()
{
var grammar = Grammar.Create();
var test = @"
INT := ""\b\d+\b"";
OP := ""[+\-*/]"";
OPAREN := ""\("";
CPAREN := ""\)"";
---
EXPR := OPAREN EXPR CPAREN OP EXPR;
EXPR := INT OP EXPR;
EXPR := OPAREN EXPR CPAREN;
EXPR := INT;
> EXPR;
";
var tokens = grammar.Tokenize(test);
Console.WriteLine(string.Join("\n", tokens));
var result = grammar.Parse(tokens);
if (result != null)
{
var printer = new PrintVisitor <GrammarToken, GrammarSymbol>();
printer.Visit(result);
}
Console.WriteLine("Now running the resultin grammar:");
var reader = new Reader();
var resultGrammar = reader.Read(result);
var test2 = "(4 + (2 * 8)) / (6 - 1)";
Console.WriteLine("Input: " + test2);
var tokens2 = resultGrammar.Tokenize(test2);
Console.WriteLine(string.Join("\n", tokens2));
var result2 = resultGrammar.Parse(tokens2);
if (result2 != null)
{
var printer = new PrintVisitor <string, string>();
printer.Visit(result2);
}
}
public void VisitConditionalExpr(bool condition, int thenValue, int elseValue, string expected)
{
var target = new PrintVisitor();
var conditionExpression = new ConstantExpr(condition);
var thenExpression = new ConstantExpr(thenValue);
var elseExpression = new ConstantExpr(elseValue);
var expr = new ConditionalExpr(conditionExpression, thenExpression, elseExpression);
var actual = target.Visit(expr, scope);
Assert.AreEqual(expected, actual);
}
public void VisitMassEnergyEquavalenceExpressionTree()
{
var target = new PrintVisitor();
var e = new IdentifierExpr("e");
var m = new IdentifierExpr("m");
var c = new IdentifierExpr("C");
var two = new ConstantExpr(2);
var expression = new AssignmentExpr(e, new MultExpr(m, new PowExpr(c, two)));
var actual = target.Visit(expression, scope);
Assert.AreEqual("e=m*C^2", actual);
}
public void VisitMathExpressionTree()
{
var target = new PrintVisitor();
var one = new ConstantExpr(1);
var two = new ConstantExpr(2);
var three = new ConstantExpr(3);
var four = new ConstantExpr(4);
var five = new ConstantExpr(5);
var six = new ConstantExpr(6);
var expression = new DivExpr(new MultExpr(three, six), new MultExpr(new MinusExpr(five, one), new PlusExpr(four, two)));
var actual = target.Visit(expression, scope);
Assert.AreEqual("3*6/5-1*4+2", actual);
}
public void VisitAlgebraicExpressionTree()
{
var target = new PrintVisitor();
var a = new IdentifierExpr("a");
var b = new IdentifierExpr("b");
var c = new IdentifierExpr("c");
var one = new ConstantExpr(1);
var two = new ConstantExpr(2);
var three = new ConstantExpr(3);
var four = new ConstantExpr(4);
var five = new ConstantExpr(5);
var six = new ConstantExpr(6);
var expression = new DivExpr(new MultExpr(three, new MultExpr(a, two)), new MultExpr(new MinusExpr(new PowExpr(five, b), one), new PlusExpr(new MinusExpr(six, four), c)));
var actual = target.Visit(expression, scope);
Assert.AreEqual("3*a*2/5^b-1*6-4+c", actual);
}
public void VisitIntegerConstantExpr()
{
var target = new PrintVisitor();
var expression = new ConstantExpr(1234);
var actual = target.Visit(expression, scope);
Assert.AreEqual("1234", actual);
}
public void VisitConditionalExpr(bool condition, int thenValue, int elseValue, string expected)
{
var target = new PrintVisitor();
var conditionExpression = new ConstantExpr(condition);
var thenExpression = new ConstantExpr(thenValue);
var elseExpression = new ConstantExpr(elseValue);
var expr = new ConditionalExpr(conditionExpression, thenExpression, elseExpression);
var actual = target.Visit(expr, scope);
Assert.AreEqual(expected, actual);
}
public void VisitBooleanNotExpr(bool a, string expected)
{
var target = new PrintVisitor();
var aExpression = new ConstantExpr(a);
var expr = new NotExpr(aExpression);
var actual = target.Visit(expr, scope);
Assert.AreEqual(expected, actual);
}
public void VisitBooleanOrExpr(object a, object b, string expected)
{
var target = new PrintVisitor();
var aExpression = new ConstantExpr(a);
var bExpression = new ConstantExpr(b);
var expr = new OrExpr(aExpression, bExpression);
var actual = target.Visit(expr, scope);
Assert.AreEqual(expected, actual);
}
public void VisitMassEnergyEquavalenceExpressionTree()
{
var target = new PrintVisitor();
var e = new IdentifierExpr("e");
var m = new IdentifierExpr("m");
var c = new IdentifierExpr("C");
var two = new ConstantExpr(2);
var expression = new AssignmentExpr(e, new MultExpr(m, new PowExpr(c, two)));
var actual = target.Visit(expression, scope);
Assert.AreEqual("e=m*C^2", actual);
}
public void VisitAlgebraicExpressionTree()
{
var target = new PrintVisitor();
var a = new IdentifierExpr("a");
var b = new IdentifierExpr("b");
var c = new IdentifierExpr("c");
var one = new ConstantExpr(1);
var two = new ConstantExpr(2);
var three = new ConstantExpr(3);
var four = new ConstantExpr(4);
var five = new ConstantExpr(5);
var six = new ConstantExpr(6);
var expression = new DivExpr(new MultExpr(three,new MultExpr(a, two)), new MultExpr(new MinusExpr(new PowExpr(five,b), one), new PlusExpr(new MinusExpr(six, four), c)));
var actual = target.Visit(expression, scope);
Assert.AreEqual("3*a*2/5^b-1*6-4+c", actual);
}
public void VisitMathExpressionTree()
{
var target = new PrintVisitor();
var one = new ConstantExpr(1);
var two = new ConstantExpr(2);
var three = new ConstantExpr(3);
var four = new ConstantExpr(4);
var five = new ConstantExpr(5);
var six = new ConstantExpr(6);
var expression = new DivExpr(new MultExpr(three, six), new MultExpr(new MinusExpr(five, one), new PlusExpr(four, two)));
var actual = target.Visit(expression, scope);
Assert.AreEqual("3*6/5-1*4+2", actual);
}
public void VisitIdentifierExpr()
{
var target = new PrintVisitor();
var expression = new IdentifierExpr("test");
var actual = target.Visit(expression, scope);
Assert.AreEqual("test", actual);
}
public void VisitDivExpr()
{
var target = new PrintVisitor();
var lhs = new ConstantExpr(1);
var rhs = new ConstantExpr(2);
var expression = new DivExpr(lhs, rhs);
var actual = target.Visit(expression, scope);
Assert.AreEqual("1/2", actual);
}
