public static Token Create(ContinueQueue parsingObject)
{
Label label = Label.Create(parsingObject);
Token token = null;
string content = parsingObject.Dequeue();
if (!char.IsLetterOrDigit(content[0]))
{
char character = content[0];
switch (character)
{
case '(':
break;
case '{':
break;
case '\"':
token = FormatString.Create(parsingObject);
break;
// # Pre-interpretation option. eg. #include <stdlib>
case '#':
token = PreInterpretationStatement.Create(parsingObject);
break;
// // Comment. eg. // Comment
case '/':
if (parsingObject.Peek()[0] == '/')
{
parsingObject.Dequeue();
token = Comment.Create(parsingObject);
}
break;
default:
break;
}
}
else
{
switch (content)
{
case "if":
token = If_Procedure.Create(parsingObject);
break;
default:
break;
}
}
token.Label = label;
return(token);
}
public static Expression Create(ContinueQueue parsingObject, File definitionFile = null)
{
string termContent = parsingObject.Dequeue();
Expression prefab = null;
if (char.IsLetterOrDigit(termContent[0]))
// It is a not a meta character
{
if (char.IsLetter(termContent[0]))
// It is a variable or function
{
if (parsingObject.Peek() == "(")
// It is a function
{
parsingObject.Dequeue();
prefab = new Expression();
prefab.Name = termContent;
string next = parsingObject.Peek();
while (next != ")")
{
Label paramLabel = Label.Create(parsingObject);
var exp = Expression.Create(parsingObject);
exp.Label = paramLabel;
prefab.parameters.Add(exp);
next = parsingObject.Peek();
if (next == ",")
{
parsingObject.Dequeue();
}
}
if (next == ")")
{
parsingObject.Dequeue();
return(prefab);
}
}
else
// It is a variable (declared)
{
switch (termContent)
{
case "true":
case "false":
prefab = Variable.Create(termContent, new SmlBool(true));
break;
default:
break;
}
}
}
}
else
{
switch (termContent)
{
case "(":
// It is a term in the form of (Expression())
Label termLabel = Label.Create(parsingObject);
prefab = Expression.Create(parsingObject, null);
prefab.Label = termLabel;
// Next char should be `)`
parsingObject.Dequeue();
break;
case "\"":
Label stringLabel = Label.Create(parsingObject);
prefab = FormatString.Create(parsingObject);
prefab.Label = stringLabel;
break;
default:
break;
}
}
return(prefab);
}
