使用 CSharpSyntaxTree.ParseText 时如何编码双引号 (Roslyn)

Question

我正在尝试使用 Roslyn 编译器动态生成程序集 & class。

当我调用 Emit 时，我得到以下关于基本构造函数中双引号值的错误：

我应该如何对传递给 ParseText 的字符串中的双引号进行编码？

var syntaxTree = CSharpSyntaxTree.ParseText(@"using System;
            using System.Linq;
            using Xxx.Operators;

            namespace Xxx.Operators
            {
                public sealed class DuplicateOperator : Operator
                {
                    public DuplicateOperator() : base(\""Sub\"")
                    {
                    }

                    public override long Execute(params Func<long>[] operands)
                    {
                        var firstValue = operands.First()() * 2;
                        return operands.Aggregate(firstValue, (a, b) => a - b());
                    }
                }
            }");

在下面的代码中调用 Emit 时会产生错误，如果我将上面的引号 (Sub) 替换为 String.Empty 之类的东西，那么 Emit 就会成功。

var references = AppDomain.CurrentDomain.GetAssemblies().Where(a => !a.IsDynamic)
                .Select(a => a.Location)
                .Distinct()
                .Select(l => MetadataReference.CreateFromFile(l))
                .ToArray();

            var compilation = CSharpCompilation.Create("Xxx.DynamicOperator", new []{syntaxTree}, references,  new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary));

            using var ms = new MemoryStream();
            var result = compilation.Emit(ms);
            if (result.Success)
            {
                ms.Seek(0, SeekOrigin.Begin);
                Assembly assembly = Assembly.Load(ms.ToArray());
            }

Answer 1

双引号用于表示verbatim string中的双引号:

Only a quote escape sequence ("") is not interpreted literally; it produces one double quotation mark

所以你应该删除 \:

@"
....
public DuplicateOperator() : base(""Sub"")
...
"

使用 CSharpSyntaxTree.ParseText 时如何编码双引号 (Roslyn)

How to encode doube quotes when using CSharpSyntaxTree.ParseText (Roslyn)

c#

verbatim-string