Antlr4目标C#误差

Question

我已经将我的C#项目设置为使用Antlr4构建目标和扩展来编译g4语法。但是，当我构建时，我会得到以下错误。有什么想法吗？

Error   1   The name 'HIDDEN' does not exist in the current context C:\gNOSIS\Oracle\Software\oracle\oracle\obj\x64\Debug\Verilog2001Lexer.cs   131 22  oracle
Error   2   The name 'HIDDEN' does not exist in the current context C:\gNOSIS\Oracle\Software\oracle\oracle\obj\x64\Debug\Verilog2001Lexer.cs   136 22  oracle
Error   4   The name 'HIDDEN' does not exist in the current context C:\gNOSIS\Oracle\Software\oracle\oracle\obj\x64\Debug\Verilog2001Lexer.cs   145 22  oracle
Error   5   'Antlr4.Runtime.ICharStream' does not contain a definition for 'LA' and no extension method 'LA' accepting a first argument of type 'Antlr4.Runtime.ICharStream' could be found (are you missing a using directive or an assembly reference?)   C:\gNOSIS\Oracle\Software\oracle\oracle\obj\x64\Debug\Verilog2001Lexer.cs   156 25  oracle
Error   6   'Antlr4.Runtime.ICharStream' does not contain a definition for 'LA' and no extension method 'LA' accepting a first argument of type 'Antlr4.Runtime.ICharStream' could be found (are you missing a using directive or an assembly reference?)   C:\gNOSIS\Oracle\Software\oracle\oracle\obj\x64\Debug\Verilog2001Lexer.cs   156 44  oracle
Error   7   'Antlr4.Runtime.ICharStream' does not contain a definition for 'LA' and no extension method 'LA' accepting a first argument of type 'Antlr4.Runtime.ICharStream' could be found (are you missing a using directive or an assembly reference?)   C:\gNOSIS\Oracle\Software\oracle\oracle\obj\x64\Debug\Verilog2001Lexer.cs   156 64  oracle
Error   8   'Antlr4.Runtime.ICharStream' does not contain a definition for 'LA' and no extension method 'LA' accepting a first argument of type 'Antlr4.Runtime.ICharStream' could be found (are you missing a using directive or an assembly reference?)   C:\gNOSIS\Oracle\Software\oracle\oracle\obj\x64\Debug\Verilog2001Lexer.cs   156 84  oracle
Error   9   The name 'EOF' does not exist in the current context    C:\gNOSIS\Oracle\Software\oracle\oracle\obj\x64\Debug\Verilog2001Parser.cs  920 23  oracle
Error   10  'oracle.Verilog2001Parser' does not contain a definition for 'EOF'  C:\gNOSIS\Oracle\Software\oracle\oracle\obj\x64\Debug\Verilog2001Parser.cs  875 66  oracle

Answer 1

在最近的一系列承诺中，这一问题以及其他一些相关问题得到了解决：

https://github.com/sharwell/antlr4cs/compare/2ac3c964...c0aa59cb

这些更改将包含在下一个版本中。在此之前，您可以在词汇语法中使用以下内容(对于组合语法，可以使用@lexer::members)：

@members {
    public const int EOF = Eof;
    public const int HIDDEN = Hidden;
}

错误5-8与语法中的语义谓词有关。在C#目标中，查找方法是La，而不是LA。

Answer 2

对于"La“/ "LA”部分，可以添加一些扩展方法来修复它：

namespace Antlr4.Runtime
{
    public static class AntlrCsCompatability
    {
        public static int LA(this ICharStream self, int i)
        {
            return self.La(i: i);
        }
    }
}

对于Lexer来说，情况也是如此：

namespace GeneratedCode.ANTLR4
{
    public partial class STLexer
    {
        public const int EOF = Eof;
        public const int HIDDEN = Hidden;
    }

}