Пример #1
0
        public void addElseIf(ElseIfExpression elseIfExp)
        {
            if (elseIfList == null)
            {
                elseIfList = new List<ElseIfExpression>();
            }

            elseIfList.Add(elseIfExp);
        }
Пример #2
0
        public void addElseIf(ElseIfExpression elseIfExp)
        {
            if (elseIfList == null)
            {
                elseIfList = new List <ElseIfExpression>();
            }

            elseIfList.Add(elseIfExp);
        }
Пример #3
0
        public IfExpression parseIfExpression()
        {
            IfExpression ifExp = new IfExpression();
            ElseIfExpression elseIfExp;
            ElseExpression elseExp;

            nextTokenIfEquals(Token.TokenValue.IF);
            nextTokenIfEquals(Token.TokenValue.LPAR);

            if (currentTokenEquals(Token.TokenValue.RPAR))
            {
                throw new EmptyExpression(lineNumber, colNumber);
            }

            ifExp.condition = parseSimpleExpression();

            if (ifExp.condition.getExpressionType() != ObjectType.booleanType)
            {
                throw new IncompatibleTypesException(lineNumber, colNumber, ObjectType.booleanType, ifExp.condition.getExpressionType());
            }

            nextTokenIfEquals(Token.TokenValue.RPAR);
            nextTokenIfEquals(Token.TokenValue.LBRACE);

            //if(e){}
            if (currentTokenEquals(Token.TokenValue.RBRACE))
            {
                ifExp.body = null;
                nextToken();
            }
            //if(e){ e }
            else
            {
                ifExp.body = parseExpression();
                nextTokenIfEquals(Token.TokenValue.RBRACE);
            }

            while (currentTokenEquals(Token.TokenValue.ELSEIF))
            {
                elseIfExp = new ElseIfExpression();

                nextToken();
                nextTokenIfEquals(Token.TokenValue.LPAR);

                if (currentTokenEquals(Token.TokenValue.RPAR))
                {
                    throw new EmptyExpression(lineNumber, colNumber);
                }

                elseIfExp.condition = parseSimpleExpression();

                if (elseIfExp.condition.getExpressionType() != ObjectType.booleanType)
                {
                    throw new IncompatibleTypesException(lineNumber, colNumber, ObjectType.booleanType, elseIfExp.condition.getExpressionType());
                }

                nextTokenIfEquals(Token.TokenValue.RPAR);
                nextTokenIfEquals(Token.TokenValue.LBRACE);

                //else if(e){}
                if (currentTokenEquals(Token.TokenValue.RBRACE))
                {
                    elseIfExp.corps = null;
                    nextToken();
                }
                //else if(e){ e }
                else
                {
                    elseIfExp.corps = parseExpression();
                    nextTokenIfEquals(Token.TokenValue.RBRACE);
                }

                ifExp.addElseIf(elseIfExp);
            }

            if (currentTokenEquals(Token.TokenValue.ELSE))
            {
                elseExp = new ElseExpression();

                nextToken();
                nextTokenIfEquals(Token.TokenValue.LBRACE);

                //else{}
                if (currentTokenEquals(Token.TokenValue.RBRACE))
                {
                    elseExp.body = null;
                    nextToken();
                }
                //else{ e }
                else
                {
                    elseExp.body = parseExpression();
                    nextTokenIfEquals(Token.TokenValue.RBRACE);
                }

                ifExp.addElse(elseExp);

            }

            return ifExp;
        }