//------------------------------------------------------------
// CNameManager.IsValidIdentifier (1)
//
/// <summary>
/// <para>Checks for a valid identifier.
/// The definition of a valid identifier can change depending on what flags are passed.</para>
/// <para>Specifically,
/// <list type="bullet">
/// <item>If AllowAtIdentifiers is set in flags, '@' in the beginning is valid.</item>
/// <item>Determine if an invalid character is in.</item>
/// <item>Determine if the name is of a keyword.</item>
/// </list>
/// </para>
/// </summary>
/// <param name="name"></param>
/// <param name="langVer">Specifiy whether according to ECMA standard or not.</param>
/// <param name="flags"></param>
/// <returns></returns>
//------------------------------------------------------------
internal bool IsValidIdentifier(
string name,
LangVersionEnum langVer,
CheckIdentifierFlagsEnum flags)
{
if (name == null || name.Length == 0)
{
return(false);
}
int idx = 0;
bool atKeyword = false;
if (name[idx] == '@')
{
if ((flags & CheckIdentifierFlagsEnum.AllowAtIdentifiers) == 0)
{
return(false);
}
atKeyword = true;
if (name.Length <= 1)
{
return(false);
}
++idx;
}
for (; idx < name.Length; ++idx)
{
if (!CharUtil.IsIdentifierCharOrDigit(name[idx]))
{
return(false);
}
}
if ((flags & CheckIdentifierFlagsEnum.CheckKeywords) == 0 || atKeyword)
{
return(true);
}
int dummy;
return(!IsKeyword(name, langVer, out dummy));
}