private CustomTree AssignmentStatement()
{
CustomTree node = AssignmentExpression();
ExpectedToken((uint)TokenTable.Code.Semicolon); // ';'
return(node);
}
public void AddChild(CustomTree node)
{
if (children == null)
{
children = new List <CustomTree>();
}
children.Add(node);
}
CustomTree LogicalExpression()
{
CustomTree node = new CustomTree("logic_expression");
node.AddChild(Expression()); // Expression
node.AddChild(new CustomTree(ExpectLogicalOp().Lexeme));
node.AddChild(Expression());
return(node);
}
private CustomTree OutputStatement()
{
CustomTree node = new CustomTree("output");
ExpectedToken((uint)TokenTable.Code.Print); // 'print'
node.AddChild(Expression());
ExpectedToken((uint)TokenTable.Code.Semicolon); // ';'
return(node);
}
CustomTree _Program()
{
CustomTree node = new CustomTree("test");
while (tokenListNode != null)
{
node.AddChild(Statement());
}
return(node);
}
CustomTree AssignmentExpression()
{
CustomTree node = new CustomTree("assignment");
var token = ExpectedToken((uint)TokenTable.Code.Id); // identifier
node.AddChild(new CustomTree("identifier", token.ForeignId));
ExpectedToken((uint)TokenTable.Code.Assign); // '='
node.AddChild(Expression(token.Lexeme));
return(node);
}
private CustomTree ConditionStatement()
{
CustomTree node = new CustomTree("if");
ExpectedToken((uint)TokenTable.Code.If); // 'if'
ExpectedToken((uint)TokenTable.Code.OpenBrackets); // '('
node.AddChild(LogicalExpression());
TransitToNextToken();
ExpectedToken((uint)TokenTable.Code.CloseBrackets); // ')'
node.AddChild(Statement());
return(node);
}
private CustomTree LoopStatement()
{
CustomTree node = new CustomTree("for");
ExpectedToken((uint)TokenTable.Code.For); // 'for'
ExpectedToken((uint)TokenTable.Code.OpenBrackets); // '('
node.AddChild(AssignmentExpression());
ExpectedToken((uint)TokenTable.Code.Semicolon); // ';'
node.AddChild(LogicalExpression());
ExpectedToken((uint)TokenTable.Code.Semicolon); // ';'
ExpectedToken((uint)TokenTable.Code.CloseBrackets); // ')'
node.AddChild(Statement());
return(node);
}
CustomTree Expression(string idName = null, POLIZBuilder builder = null)
{
CustomTree node = new CustomTree("expression");
builder = new POLIZBuilder();
while (GetTokenCode() != (uint)TokenTable.Code.Semicolon && !TokenTable.LogicOpCodes.Contains(GetTokenCode()))
{
builder.Append(GetCurrent());
TransitToNextToken();
}
var tokens = builder.End();
if (idName != null)
{
CustomTree st = new CustomTree(idName);
st.AddChild(new CustomTree(idName));
foreach (var token in tokens)
{
st.AddChild(token.Code == (uint)TokenTable.Code.Id
? new CustomTree("identifier", token.ForeignId)
: new CustomTree(token.Lexeme));
node.AddChild(token.Code == (uint)TokenTable.Code.Id
? new CustomTree("identifier", token.ForeignId)
: new CustomTree(token.Lexeme));
}
st.AddChild(new CustomTree("="));
Console.Write("POLIZ: ");
foreach (var child in st.GetChildren())
{
Console.Write(child.Name + " ");
}
Console.WriteLine();
}
else
{
foreach (var token in tokens)
{
node.AddChild(token.Code == (uint)TokenTable.Code.Id
? new CustomTree("identifier", token.ForeignId)
: new CustomTree(token.Lexeme));
}
}
return(node);
}
private CustomTree DeclarationStatement()
{
CustomTree node = new CustomTree("declaration");
//"int" | "float"
var token = ExpectedOneOfTokens("TypeSpecifier", (uint)TokenTable.Code.Int, 100);
node.AddChild(new CustomTree(TokenTable.GetLexemeName(token.Code)));
// identifier
token = ExpectedToken((uint)TokenTable.Code.Id);
node.AddChild(new CustomTree("identifier", token.ForeignId));
ExpectedToken((uint)TokenTable.Code.Semicolon); // ';'
return(node);
}
static void PrintSyntaxTree(TokenTable tokensTable, CustomTree node, int level = 0)
{
Console.Write($"{new string('\t', level)} {node.Name}");
if (node.Id != 0)
{
Console.Write(node.Name == "identifier"
? $"\"{tokensTable.IdentifiersTable[node.Id]}\""
: $"\"{tokensTable.LiteralsTable[node.Id]}\"");
Console.Write($" ({node.Id})");
}
Console.WriteLine();
if (node.GetChildren() == null)
{
return;
}
foreach (var child in node.GetChildren())
{
PrintSyntaxTree(tokensTable, child, level + 1);
}
}
