NextToken() private method

private NextToken ( ) : void
return void
コード例 #1
0
ファイル: Compiler.cs プロジェクト: robotii/Wren.NET
        public static ObjFn Compile(WrenVM vm, ObjModule module, string sourcePath, string source, bool printErrors)
        {
            Parser parser = new Parser
            {
                vm = vm,
                Module = module,
                SourcePath = sourcePath,
                Source = source,
                TokenStart = 0,
                CurrentChar = 0,
                CurrentLine = 1,
                Current = { Type = TokenType.Error, Start = 0, Length = 0, Line = 0 },
                SkipNewlines = true,
                PrintErrors = printErrors,
                HasError = false,
                Raw = ""
            };

            Compiler compiler = new Compiler(parser, null, true);

            // Read the first token.
            compiler.NextToken();

            compiler.IgnoreNewlines();

            while (!compiler.Match(TokenType.Eof))
            {
                compiler.Definition();

                // If there is no newline, it must be the end of the block on the same line.
                if (!compiler.MatchLine())
                {
                    compiler.Consume(TokenType.Eof, "Expect end of file.");
                    break;
                }
            }

            compiler.Emit(Instruction.NULL);
            compiler.Emit(Instruction.RETURN);

            // See if there are any implicitly declared module-level variables that never
            // got an explicit definition.
            // TODO: It would be nice if the error was on the line where it was used.
            for (int i = 0; i < parser.Module.Variables.Count; i++)
            {
                ModuleVariable t = parser.Module.Variables[i];
                if (t.Container == Obj.Undefined)
                {
                    compiler.Error(string.Format("Variable '{0}' is used but not defined.", t.Name));
                }
            }

            return compiler.EndCompiler("(script)");
        }