public Node AssignmentOrCallStatement() { var id_node = Node.fromToken(Expect(TokenCategory.IDENTIFIER)); Node node = null; if (Has(TokenCategory.PARENTHESIS_OPEN)) { node = new CallStatementNode() { AnchorToken = id_node.AnchorToken }; Expect(TokenCategory.PARENTHESIS_OPEN); node.Add(Optional(firstOfExpression, () => { var list = new List <Node>() { Expression() }; list.AddRange(ZeroOrMore(TokenCategory.COMMA, Expression, true)); return(list); })); Expect(TokenCategory.PARENTHESIS_CLOSE); } else if (Has(TokenCategory.BRACKET_OPEN) || Has(TokenCategory.COLON_EQUAL)) { node = new AssignmentNode(); if (Has(TokenCategory.BRACKET_OPEN)) { Expect(TokenCategory.BRACKET_OPEN); var expression_node = Expression(); Expect(TokenCategory.BRACKET_CLOSE); node.Add(new ListIndexNode() { id_node, expression_node }); } else { node.Add(id_node); } node.AnchorToken = Expect(TokenCategory.COLON_EQUAL); node.Add(Expression()); } else { throw new SyntaxError(firstOfAssignmentOrCallStatement, tokenStream.Current); } Expect(TokenCategory.SEMICOLON); return(node); }
public Node Stmt() { switch (CurrentToken) { case TokenCategory.IDENTIFIER: var idToken = Expect(TokenCategory.IDENTIFIER); switch (CurrentToken) { case TokenCategory.ASSIGN: Expect(TokenCategory.ASSIGN); var ass = new AssignmentNode() { AnchorToken = idToken }; ass.Add(Expr()); Expect(TokenCategory.SEMICOLON); return(ass); case TokenCategory.INCREMENT: Expect(TokenCategory.INCREMENT); var inc = new IncrementNode() { AnchorToken = idToken }; Expect(TokenCategory.SEMICOLON); return(inc); case TokenCategory.DECREMENT: Expect(TokenCategory.DECREMENT); var dec = new DecrementNode() { AnchorToken = idToken }; Expect(TokenCategory.SEMICOLON); return(dec); case TokenCategory.PARENTHESIS_OPEN: Expect(TokenCategory.PARENTHESIS_OPEN); var fun = new FunCallNode() { AnchorToken = idToken }; fun.Add(ExprList()); Expect(TokenCategory.PARENTHESIS_CLOSE); Expect(TokenCategory.SEMICOLON); return(fun); } break; case TokenCategory.IF: return(If()); case TokenCategory.WHILE: return(While()); case TokenCategory.BREAK: var bre = new StmtNode() { AnchorToken = Expect(TokenCategory.BREAK) }; Expect(TokenCategory.SEMICOLON); return(bre); case TokenCategory.RETURN: return(Return()); case TokenCategory.SEMICOLON: return(new StmtNode() { AnchorToken = Expect(TokenCategory.SEMICOLON) }); default: throw new SyntaxError(firstOfStmt, tokenStream.Current); } throw new SyntaxError(firstOfStmt, tokenStream.Current); }