如何更新对读取文件完成的转换？

Question

如何更新文件的内容，"teste.java" 例如转换结果？

loc s =  |project://java-sample/teste.java|;
content = readFile(s);
CompilationUnit cUnit = parse(#CompilationUnit, content);
visit(cUnit) {
   case (Statement) `if (<Expression cond>) { return true; } else { return false; }` =>  
        (Statement) `return <Expression cond>;`
}

Answer 1

visit returns 新树。您可以使用 writeFile 将该树保存到文件中，这将对其进行解析并保存文件：

loc s =  |project://java-sample/teste.java|;
content = readFile(s);
CompilationUnit cUnit = parse(#CompilationUnit, content);
cUnitNew = visit(cUnit) { // note the assignment!
   case (Statement) `if (<Expression cond>) { return true; } else { return false; }` =>  
        (Statement) `return <Expression cond>;`
}
writeFile(s, cUnitNew); // write the new string to disk