|
public Append ( char value ) : |
||
| value | char | |
| Résultat | ||
public string Resolve()
{
var currentState = States.CopyingLiterals;
_Result = new Result();
StringBuilder currentExpression = null;
foreach (var character in _template.ToCharArray())
{
switch (currentState)
{
case States.CopyingLiterals:
if (character == '{')
{
currentState = States.ParsingExpression;
currentExpression = new StringBuilder();
}
else if (character == '}')
{
throw new ArgumentException("Malformed template, unexpected } : " + _Result.ToString());
}
else
{
_Result.Append(character);
}
break;
case States.ParsingExpression:
if (character == '}')
{
ProcessExpression(currentExpression);
currentState = States.CopyingLiterals;
}
else
{
currentExpression.Append(character);
}
break;
}
}
if (currentState == States.ParsingExpression)
{
_Result.Append("{");
_Result.Append(currentExpression.ToString());
throw new ArgumentException("Malformed template, missing } : " + _Result.ToString());
}
if (_ErrorDetected)
{
throw new ArgumentException("Malformed template : " + _Result.ToString());
}
return _Result.ToString();
}
private void ProcessExpression(StringBuilder currentExpression)
{
if (currentExpression.Length == 0)
{
_ErrorDetected = true;
_Result.Append("{}");
return;
}
OperatorInfo op = GetOperator(currentExpression[0]);
var firstChar = op.Default ? 0 : 1;
bool multivariableExpression = false;
var varSpec = new VarSpec(op);
for (int i = firstChar; i < currentExpression.Length; i++)
{
char currentChar = currentExpression[i];
switch (currentChar)
{
case '*':
varSpec.Explode = true;
break;
case ':': // Parse Prefix Modifier
var prefixText = new StringBuilder();
currentChar = currentExpression[++i];
while (currentChar >= '0' && currentChar <= '9' && i < currentExpression.Length)
{
prefixText.Append(currentChar);
i++;
if (i < currentExpression.Length)
{
currentChar = currentExpression[i];
}
}
varSpec.PrefixLength = int.Parse(prefixText.ToString());
i--;
break;
case ',':
multivariableExpression = true;
var success = ProcessVariable(varSpec, multivariableExpression);
bool isFirst = varSpec.First;
// Reset for new variable
varSpec = new VarSpec(op);
if (success || !isFirst || _resolvePartially)
{
varSpec.First = false;
}
if (!success && _resolvePartially)
{
_Result.Append(",");
}
break;
default:
if (IsVarNameChar(currentChar))
{
varSpec.VarName.Append(currentChar);
}
else
{
_ErrorDetected = true;
}
break;
}
}
ProcessVariable(varSpec, multivariableExpression);
if (multivariableExpression && _resolvePartially)
{
_Result.Append("}");
}
}
