public int Run(string input)
{
var tokens = _lexer.Scan(input);
var ast = new AST(tokens);
ast.EvaluationCallBack = (token) => { _printer.Print(token); };
var result = ast.Evaluate() ?? 0;
_printer.Print(result);
//_printer.Print(tokens, result);
return(result);
}
public SpecificationAbstractSyntaxTree Parse(string source)
{
var result = new SpecificationAbstractSyntaxTree();
Header1Node currentHeader1 = null;
Header2Node currentHeader2 = null;
ExampleNode currentExample = null;
foreach (var token in _lexer.Scan(source))
{
// Example section
if (currentExample != null)
{
switch (token.TokenType)
{
case TokenType.ExampleMarkdownLine:
currentExample.MarkdownNodes.Add(new MarkdownExampleNode(token.Lexeme));
continue;
case TokenType.ExampleHtmlLine:
currentExample.HtmlNodes.Add(new HtmlExampleNode(token.Lexeme));
continue;
case TokenType.ExampleDelim:
continue;
case TokenType.ExampleEnd:
currentExample = null;
continue;
default:
throw new CompilationException();
}
}
// Header2 section
if (currentHeader2 != null)
{
switch (token.TokenType)
{
case TokenType.TextLine:
currentHeader2.ChildNodes.Add(new TextNode(token.Lexeme));
continue;
case TokenType.Header1:
currentHeader2 = null;
currentHeader1 = new Header1Node(token.Lexeme, token.Value);
result.ChildNodes.Add(currentHeader1);
continue;
case TokenType.Header2:
currentHeader2 = new Header2Node(token.Lexeme, token.Value);
currentHeader1.ChildNodes.Add(currentHeader2);
continue;
case TokenType.ExampleStart:
currentExample = new ExampleNode();
currentHeader2.ChildNodes.Add(currentExample);
continue;
default:
throw new CompilationException();
}
}
// Header1 section
if (currentHeader1 != null)
{
switch (token.TokenType)
{
case TokenType.TextLine:
currentHeader1.ChildNodes.Add(new TextNode(token.Lexeme));
continue;
case TokenType.Header1:
currentHeader1 = new Header1Node(token.Lexeme, token.Value);
result.ChildNodes.Add(currentHeader1);
continue;
case TokenType.Header2:
currentHeader2 = new Header2Node(token.Lexeme, token.Value);
currentHeader1.ChildNodes.Add(currentHeader2);
continue;
case TokenType.ExampleStart:
currentExample = new ExampleNode();
currentHeader1.ChildNodes.Add(currentExample);
continue;
default:
throw new CompilationException();
}
}
// Root section
switch (token.TokenType)
{
case TokenType.TextLine:
result.ChildNodes.Add(new TextNode(token.Lexeme));
continue;
case TokenType.Header1:
currentHeader1 = new Header1Node(token.Lexeme, token.Value);
result.ChildNodes.Add(currentHeader1);
continue;
case TokenType.ExampleStart:
currentExample = new ExampleNode();
result.ChildNodes.Add(currentExample);
continue;
default:
throw new CompilationException();
}
}
return(result);
}
public virtual void LookAhead() => LookAheadToken = _lexer.Scan();
