Maven XTEXT 2.10 外部词法分析器答案

【问题标题】：Maven XTEXT 2.10 external LexerMaven XTEXT 2.10 外部词法分析器
【发布时间】：2016-06-30 14:41:25
【问题描述】：

首先：对不起我的英语不好......

我有一个带有类似外部词法分析器的 2.4 Xtext 项目：

// In order to separate lexer and parser (both are managed in the same time by default)
        fragment = org.eclipse.xtext.generator.parser.antlr.ex.rt.AntlrGeneratorFragment {
            antlrParam = "-Xconversiontimeout"
            antlrParam = "30000"
            options = {
                backtrack = true
                backtrackLexer = false
            }
        }

        // Uses ANTLR Tools to compile a custom lexer and will also add a binding in the runtime module to use the Lexer
        fragment = parser.antlr.ex.ExternalAntlrLexerFragment {
            // A grammar file with .g will be expected in this package (should be stored in src folder)
            lexerGrammar = "com.group.xxx.xtext.customlexer.CustomEditorLexer"
            runtime = true
            antlrParam = "-lib"
            // This is the folder where the lexer will be created
            antlrParam = "${runtimeProject}/src-gen/com/group/xxx/xtext/customlexer"
        }

现在我尝试将此项目迁移到 maven xtext 2.10，但我不知道如何使用新的 xtext 生成器来做到这一点。（该项目运行没有问题，但我的外部 lexar 没有）。

我尝试做这样的事情：

language = StandardLanguage {
        name = "com.group.xxx.xtext.Editor"
        fileExtensions = "xxx"

        serializer = {
            generateStub = false
        }

        parserGenerator = {

            combinedGrammar = false
            antlrParam = "com.group.xxx.xtext/src/com/group/xxx/xtext/customlexer"
            options = {
                backtrack = true
                backtrackLexer = false
            }

词法分析器和解析器被分为 gen 文件夹，但 xtext 继续使用生成的词法分析器而不是我的。

请您给我建议吗？

【问题讨论】：

标签： maven generator xtext

【解决方案1】：

您可以使用 FragmentAdapter 来包含 IGeneratorFragments，例如 ExternalAntlrParserFragment：

parserGenerator = {
    antlrParam = "-Xconversiontimeout"
    antlrParam = "30000"
    options = {
        backtrack = true
        backtrackLexer = false
    }
}
fragment = org.eclipse.xtext.generator.adapter.FragmentAdapter {
    fragment = org.eclipse.xtext.generator.parser.antlr.ex.ExternalAntlrLexerFragment {
    // A grammar file with .g will be expected in this package (should be stored in src folder)
        lexerGrammar = "com.group.xxx.xtext.customlexer.CustomEditorLexer"
        runtime = true
        antlrParam = "-lib"// This is the folder where the lexer will be created
        antlrParam = "${rootPath}/${basename}/src-gen/com/group/xxx/xtext/customlexer"
    }
}

【讨论】：