private void _VisitVarNode(ASTVarNode node)
{
if (_Tables.Lookup(node.Value.Value) == null)
{
throw new Exception("Variable " + node.Value.Value + " is undefined!");
}
}
private ASTNode _DeclareStatement()
{
var type = _CurrentToken;
if (_CurrentToken.Type == TokenType.INT ||
_CurrentToken.Type == TokenType.FLOAT)
{
_Eat(_CurrentToken.Type);
}
else
{
throw new Exception("Unexpected token: " + type.Value + ". Expected a type.");
}
//Parse the current token as a variable
ASTVarNode name = _Variable();
ASTDeclareNode node = new ASTDeclareNode(name, new ASTTypeNode(type));
_Eat(TokenType.SEMI);
return(node);
//TODO: Support assigning to a just-declared variable
}