/// <summary>
/// Checks a type to determine whether it should use one of the built-in types.
/// </summary>
/// <param name="type">The type to check.</param>
/// <param name="parentElement">The parent element.</param>
private void CheckBuiltInType(TypeToken type, Element parentElement)
{
Param.AssertNotNull(type, "type");
Param.AssertNotNull(parentElement, "parentElement");
if (!type.IsGeneric)
{
for (int i = 0; i < this.builtInTypes.Length; ++i)
{
string[] builtInType = this.builtInTypes[i];
if (type.MatchTokens(builtInType[ShortNameIndex]) ||
type.MatchTokens("System", ".", builtInType[ShortNameIndex]))
{
// If the previous token is an equals sign, then this is a using alias directive. For example:
// using SomeAlias = System.String;
bool usingAliasDirective = false;
for (LexicalElement previous = type.FindPreviousLexicalElement(); previous != null; previous = previous.FindPreviousLexicalElement())
{
if (previous.LexicalElementType != LexicalElementType.Comment &&
previous.LexicalElementType != LexicalElementType.WhiteSpace &&
previous.LexicalElementType != LexicalElementType.EndOfLine)
{
if (previous.Text == "=")
{
usingAliasDirective = true;
}
break;
}
}
if (!usingAliasDirective)
{
this.Violation(
Rules.UseBuiltInTypeAlias,
new ViolationContext(parentElement, type.LineNumber, builtInType[AliasIndex], builtInType[ShortNameIndex], builtInType[LongNameIndex]),
(c, o) =>
{
// Insert a new type token with the correct aliased version of the type.
CsDocument document = type.Document;
TypeToken aliasType = document.CreateTypeToken(document.CreateLiteralToken(builtInType[AliasIndex]));
document.Replace(type, aliasType);
});
}
break;
}
}
}
}
