Peek() 개인적인 메소드

private Peek ( ) : TokenType
리턴 TokenType
예제 #1
0
        // A map literal.
        private static void Map(Compiler c, bool allowAssignment)
        {
            // Load the Map class.
            c.LoadCoreVariable("Map");

            // Instantiate a new map.
            c.CallMethod(0, "new()");

            // Compile the map elements. Each one is compiled to just invoke the
            // subscript setter on the map.
            if (c.Peek() != TokenType.RightBrace)
            {
                do
                {
                    c.IgnoreNewlines();

                    if (c.Peek() == TokenType.RightBrace)
                        break;

                    // Push a copy of the map since the subscript call will consume it.
                    c.Emit(Instruction.DUP);

                    // The key.
                    c.ParsePrecedence(false, Precedence.Primary);
                    c.Consume(TokenType.Colon, "Expect ':' after map key.");
                    c.IgnoreNewlines();

                    // The value.
                    c.Expression();
                    c.CallMethod(2, "[_]=(_)");

                    // Discard the result of the setter call.
                    c.Emit(Instruction.POP);
                } while (c.Match(TokenType.Comma));
            }

            // Allow newlines before the closing '}'.
            c.IgnoreNewlines();
            c.Consume(TokenType.RightBrace, "Expect '}' after map entries.");
        }
예제 #2
0
        // A map literal.
        private static void Map(Compiler c, bool allowAssignment)
        {
            // Load the Map class.
            int mapClassSymbol = c.parser.module.Variables.FindIndex(v => v.Name == "Map");
            c.EmitShortArg(Instruction.LOAD_MODULE_VAR, mapClassSymbol);

            // Instantiate a new map.
            c.CallMethod(0, "<instantiate>");

            // Compile the map elements. Each one is compiled to just invoke the
            // subscript setter on the map.
            if (c.Peek() != TokenType.TOKEN_RIGHT_BRACE)
            {
                do
                {
                    c.IgnoreNewlines();

                    // Push a copy of the map since the subscript call will consume it.
                    c.Emit(Instruction.DUP);

                    // The key.
                    c.ParsePrecedence(false, Precedence.PREC_PRIMARY);
                    c.Consume(TokenType.TOKEN_COLON, "Expect ':' after map key.");

                    // The value.
                    c.Expression();

                    c.CallMethod(2, "[_]=(_)");

                    // Discard the result of the setter call.
                    c.Emit(Instruction.POP);
                } while (c.Match(TokenType.TOKEN_COMMA));
            }

            // Allow newlines before the closing '}'.
            c.IgnoreNewlines();
            c.Consume(TokenType.TOKEN_RIGHT_BRACE, "Expect '}' after map entries.");
        }
예제 #3
0
        // A list literal.
        private static void List(Compiler c, bool allowAssignment)
        {
            // Load the List class.
            c.LoadCoreVariable("List");

            // Instantiate a new list.
            c.CallMethod(0, "new()");

            // Compile the list elements. Each one compiles to a ".add()" call.
            if (c.Peek() != TokenType.RightBracket)
            {
                do
                {
                    c.IgnoreNewlines();

                    if (c.Peek() == TokenType.RightBracket)
                        break;

                    // Push a copy of the list since the add() call will consume it.
                    c.Emit(Instruction.DUP);

                    // The element.
                    c.Expression();
                    c.CallMethod(1, "add(_)");

                    // Discard the result of the add() call.
                    c.Emit(Instruction.POP);
                } while (c.Match(TokenType.Comma));
            }

            // Allow newlines before the closing ']'.
            c.IgnoreNewlines();
            c.Consume(TokenType.RightBracket, "Expect ']' after list elements.");
        }
예제 #4
0
        // A list literal.
        private static void List(Compiler c, bool allowAssignment)
        {
            // Load the List class.
            int listClassSymbol = c.parser.module.Variables.FindIndex(v => v.Name == "List");
            //ASSERT(listClassSymbol != -1, "Should have already defined 'List' variable.");
            c.EmitShortArg(Instruction.LOAD_MODULE_VAR, listClassSymbol);

            // Instantiate a new list.
            c.CallMethod(0, "<instantiate>");

            // Compile the list elements. Each one compiles to a ".add()" call.
            if (c.Peek() != TokenType.TOKEN_RIGHT_BRACKET)
            {
                do
                {
                    c.IgnoreNewlines();

                    // Push a copy of the list since the add() call will consume it.
                    c.Emit(Instruction.DUP);

                    // The element.
                    c.Expression();
                    c.CallMethod(1, "add(_)");

                    // Discard the result of the add() call.
                    c.Emit(Instruction.POP);
                } while (c.Match(TokenType.TOKEN_COMMA));
            }

            // Allow newlines before the closing ']'.
            c.IgnoreNewlines();
            c.Consume(TokenType.TOKEN_RIGHT_BRACKET, "Expect ']' after list elements.");
        }