/// <summary>
/// Converts the specified expression into an enumerable of expressions by walking the expression tree
/// </summary>
/// <param name="expression">The expression to enumerate</param>
/// <returns>An enumerable containing all expressions in the input expression</returns>
public static IEnumerable <Expression> AsEnumerable(this Expression expression)
{
var walker = new ExpressionWalker();
walker.Visit(expression);
return(walker.Expressions);
}
private EvaluationResult AnalyzeExpression([NotNull] IOperation expression)
{
Guard.NotNull(expression, nameof(expression));
context.CancellationToken.ThrowIfCancellationRequested();
var walker = new ExpressionWalker(this);
walker.Visit(expression);
return(walker.Result);
}
public void TraverseAllExpressionsInASyntaxTreeUsingAWalker()
{
var tree = SyntaxFactory.ParseSyntaxTree(@"
using System;
class Program
{
static void Main()
{
var i = 0.0;
i += 1 + 2L;
}
}");
var compilation = CSharpCompilation.Create("MyCompilation")
.AddReferences(Mscorlib)
.AddSyntaxTrees(tree);
var model = compilation.GetSemanticModel(tree);
var walker = new ExpressionWalker() { SemanticModel = model };
walker.Visit(tree.GetRoot());
Assert.Equal(@"
PredefinedTypeSyntax void has type void
IdentifierNameSyntax var has type double
LiteralExpressionSyntax 0.0 has type double
AssignmentExpressionSyntax i += 1 + 2L has type double
IdentifierNameSyntax i has type double
BinaryExpressionSyntax 1 + 2L has type long
LiteralExpressionSyntax 1 has type int
LiteralExpressionSyntax 2L has type long", walker.Results.ToString());
}
