public Node CallStatement(Token identifier)
{
var callStatement = new Call_Statement()
{
AnchorToken = identifier
};
Expect(TokenCategory.PARENTHESIS_OPEN);
if (CurrentToken != TokenCategory.PARENTHESIS_CLOSE)
{
var expr1 = Expression();
while (CurrentToken == TokenCategory.COMMA)
{
var expr2 = new Identifier()
{
AnchorToken = Expect(TokenCategory.COMMA)
};
expr2.Add(expr1);
expr2.Add(Expression());
expr1 = expr2;
}
Expect(TokenCategory.PARENTHESIS_CLOSE);
Expect(TokenCategory.EOL);
callStatement.Add(expr1);
}
else
{
Expect(TokenCategory.PARENTHESIS_CLOSE);
Expect(TokenCategory.EOL);
}
return(callStatement);
}
public Node AssignmentOrCallStatement()
{
var id_node = Node.fromToken(Expect(TokenCategory.IDENTIFIER));
Node node = null;
if (Has(TokenCategory.PARENTHESIS_OPEN))
{
node = new Call_Statement()
{
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 Assignment_Statement();
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;
}