public static bool TryParse(string input, out RegisterSyntax registerSyntax, BracketExpectation bracketExpectation = BracketExpectation.NotPresent)
{
bool isSuccess;
bool isRegister = Regex.IsMatch(input, @"^\[?R[0-9A-F]\]?$");
bool isSurroundedByBrackets = input.StartsWith("[") && input.EndsWith("]");
if (bracketExpectation == BracketExpectation.Present)
{
isSuccess = isRegister && isSurroundedByBrackets;
}
else
{
isSuccess = isRegister && !isSurroundedByBrackets;
}
if (isSuccess)
{
registerSyntax = new RegisterSyntax(input.Trim('[', ']'));
}
else
{
registerSyntax = null;
}
return(isSuccess);
}
public static bool TryParseAddress(string input, out AddressSyntax addressSyntax, BracketExpectation bracketExpectation = BracketExpectation.NotPresent)
{
bool isSuccess;
byte address;
string undefinedLabel;
bool isAddress = IsAddress(input.Trim('[', ']'), out address, out undefinedLabel);
bool isSurroundedByBrackets = input.StartsWith("[") && input.EndsWith("]");
if (bracketExpectation == BracketExpectation.Present)
isSuccess = isAddress && isSurroundedByBrackets;
else
isSuccess = isAddress && !isSurroundedByBrackets;
if (isSuccess)
addressSyntax = new AddressSyntax(address, undefinedLabel);
else
addressSyntax = null;
return isSuccess;
}
public static bool TryParseRegister(string input, out RegisterSyntax registerSyntax, BracketExpectation bracketExpectation = BracketExpectation.NotPresent)
{
bool isSuccess;
bool isRegister = Regex.IsMatch(input, @"^\[?R[0-9A-F]\]?$");
bool isSurroundedByBrackets = input.StartsWith("[") && input.EndsWith("]");
if (bracketExpectation == BracketExpectation.Present)
isSuccess = isRegister && isSurroundedByBrackets;
else
isSuccess = isRegister && !isSurroundedByBrackets;
if (isSuccess)
registerSyntax = new RegisterSyntax(input.Trim('[', ']'));
else
registerSyntax = null;
return isSuccess;
}
public static bool TryParse(string input, SymbolTable symbolTable, out AddressSyntax addressSyntax, BracketExpectation bracketExpectation = BracketExpectation.NotPresent)
{
bool isSuccess;
bool isAddress = IsAddress(input.Trim('[', ']'), symbolTable, out byte address, out string undefinedLabel);
bool isSurroundedByBrackets = input.StartsWith("[") && input.EndsWith("]");
if (bracketExpectation == BracketExpectation.Present)
{
isSuccess = isAddress && isSurroundedByBrackets;
}
else
{
isSuccess = isAddress && !isSurroundedByBrackets;
}
if (isSuccess)
{
addressSyntax = new AddressSyntax(address, undefinedLabel);
}
else
{
addressSyntax = null;
}
return(isSuccess);
}
