/// <summary>
/// Add Delimiters Lex items, and recomand to add composite delimiters first.
/// </summary>
/// <param name="name">Name of Lex items</param>
/// <param name="formatCapTextDelegate">The delegate of formatting the result of regExprs</param>
/// <param name="regexOptions">Regular Expression Options</param>
/// <param name="regExprs">Regular Expressions of Lex items</param>
public void AddDelimiters(string name = "Delimiter", FormatCapTextDelegate formatCapTextDelegate = null, RegexOptions regexOptions = RegexOptions.None, params string[] regExprs)
{
for (int i = 0; i < regExprs.Length; i++)
{
AddLexItem(name, regExprs[i], formatCapTextDelegate, regexOptions, CurrentAddGroupNumber);
}
}
/// <summary>
/// Construct method
/// </summary>
/// <param name="name">Name of Lex Item</param>
/// <param name="formatCapText">The delegate of formatting the result of RegExpr</param>
/// <exception cref="IlleagalNameException">if name start with '@'</exception>
public LexItem(string name, FormatCapTextDelegate formatCapText)
{
if (Regex.Match(name, "^@.+").Success)
{
throw new IlleagalNameException(name, "Illeagal Name: " + name + ". Name cannot start with '@'.");
}
Name = name;
FormatCapText = formatCapText;
Regex = null;
}
/// <summary>
/// Add Constants Lex items, and recomand to add composite constants first.
/// </summary>
/// <param name="name">Name of Lex items</param>
/// <param name="formatCapTextDelegate">The delegate of formatting the result of regExprs</param>
/// <param name="regexOptions">Regular Expression Options</param>
/// <param name="isAddZeroWidthAssertion">Is auto add <c>(?=\w|$)</c> to the end of RegExprs</param>
/// <param name="regExprs">Regular Expressions of Lex items</param>
public void AddConstants(string name = "Constant", FormatCapTextDelegate formatCapTextDelegate = null, RegexOptions regexOptions = RegexOptions.None, bool isAddZeroWidthAssertion = true, params string[] regExprs)
{
for (int i = 0; i < regExprs.Length; i++)
{
if (!regExprs[i].EndsWith(@"(?=\W|$)") && isAddZeroWidthAssertion)
{
regExprs[i] += @"(?=\W|$)";
}
AddLexItem(name, regExprs[i], formatCapTextDelegate, regexOptions, CurrentAddGroupNumber);
}
}
/// <summary>
/// Add reserved words Lex items, and recomand to do this before add indentifier Lex item.
/// </summary>
/// <param name="name">Name of Lex items</param>
/// <param name="formatCapTextDelegate">The delegate of formatting the result of regExprs</param>
/// <param name="regexOptions">Regular Expression Options</param>
/// <param name="regExprs">Regular Expressions of Lex items, and auto add <c>(?=\W|$)</c> to the end</param>
public void AddResWords(string name = "ResWord", FormatCapTextDelegate formatCapTextDelegate = null, RegexOptions regexOptions = RegexOptions.None, params string[] regExprs)
{
for (int i = 0; i < regExprs.Length; i++)
{
if (!regExprs[i].EndsWith(@"(?=\W|$)"))
{
regExprs[i] += @"(?=\W|$)";
}
AddLexItem(name, regExprs[i], formatCapTextDelegate, regexOptions, CurrentAddGroupNumber);
}
}
public void Setup()
{
Lexeresults = new List <KeyValuePair <string, object> >();
LexerFramework = new LexerFramework();
formatNullDelegate = FormatNull;
LexerFramework.AddLexItem("Null", @"[\s]", formatNullDelegate);
LexerFramework.AddLexItem("Type", "int");
LexerFramework.AddLexItem("Operator", "=");
LexerFramework.AddLexItem("Delimiter", ";");
formatDigitDelegate = FormateDigit;
LexerFramework.AddLexItem("Digit", "[0-9]+", formatDigitDelegate);
LexerFramework.AddLexItem("Identifier", "[A-Za-z][A-Za-z0-9_]*");
LexerFramework.OnLexedEventHandler += OnLexd;
}
/// <summary>
/// Add a Lex item, and Lex with this order.
/// </summary>
/// <param name="name">Name of item</param>
/// <param name="regExpr">Regular Expression of Lex, and automately add "^" at head</param>
/// <param name="regexOptions">Regular Expression Options</param>
/// <param name="formatCapTextDelegate">The delegate of formatting the result of regExpr</param>
/// <param name="group">LexGroup for advanced usage</param>
/// <exception cref="GroupNumException">if Lex group number is out of limite or under zero</exception>
public void AddLexItem(string name, string regExpr, FormatCapTextDelegate formatCapTextDelegate = null, RegexOptions regexOptions = RegexOptions.None, int group = 0)
{
if (name.Length == 0)
{
return;
}
if (regExpr.Length == 0)
{
return;
}
LexItem LexItem = new LexItem(name, formatCapTextDelegate);
if (!regExpr.StartsWith('^'))
{
regExpr = '^' + regExpr; // reg expr must start from head of string
}
LexItem.SetRegex(regExpr, regexOptions);
if (group >= LexGroupCount || group < 0)
{
throw new GroupNumException(group, "AddLexItem Error: illeagal Lex group number: " + group);
}
LexItems[group].Add(LexItem);
}
/// <summary>
/// Add identifier Lex item, and recomand to do this after add reserved words Lex item.
/// </summary>
/// <param name="name">Name of Lex item</param>
/// <param name="formatCapTextDelegate">The delegate of formatting the result of regExprs</param>
/// <param name="regexOptions">Regular Expression Options</param>
/// <param name="regExpr">Regular Expression of Lex item</param>
public void AddIdentifier(string name = "Identifier", FormatCapTextDelegate formatCapTextDelegate = null, RegexOptions regexOptions = RegexOptions.None, string regExpr = @"[A-Za-z]\w*")
{
AddLexItem(name, regExpr, formatCapTextDelegate, regexOptions, CurrentAddGroupNumber);
}
/// <summary>
/// Add a Lex item in group of AddCurrentGroupNumber, and Lex with this order.
/// </summary>
/// <param name="name">Name of item</param>
/// <param name="regExpr">Regular Expression of Lex, and automately add "^" at head</param>
/// <param name="regexOptions">Regular Expression Options</param>
/// <param name="formatCapTextDelegate">The delegate of formatting the result of regExpr</param>
public void AddLexItem(string name, string regExpr, FormatCapTextDelegate formatCapTextDelegate = null, RegexOptions regexOptions = RegexOptions.None)
{
AddLexItem(name, regExpr, formatCapTextDelegate, regexOptions, CurrentAddGroupNumber);
}
