/// <summary>
/// 分析标签
/// </summary>
/// <param name="parser">TemplateParser</param>
/// <param name="tc">Token集合</param>
/// <returns></returns>
public Tag Parse(TemplateParser parser, TokenCollection tc)
{
if (tc != null &&
parser != null &&
tc.Count > 3 &&
Common.Utility.IsEqual(tc.First.Text, Field.KEY_ELSEIF))
{
if (tc[1].TokenKind == TokenKind.LeftParentheses &&
tc.Last.TokenKind == TokenKind.RightParentheses)
{
ElseifTag tag = new ElseifTag();
TokenCollection coll = new TokenCollection();
coll.Add(tc, 2, tc.Count - 2);
tag.Test = parser.Read(coll);
return(tag);
}
else
{
throw new Exception.ParseException(String.Concat("syntax error near if:", tc), tc.First.BeginLine, tc.First.BeginColumn);
}
}
return(null);
}
/// <summary>
///
/// </summary>
/// <param name="ctx"></param>
/// <param name="tag"></param>
/// <returns></returns>
internal static Type GuessIfType(this CompileContext ctx, ElseifTag tag)
{
var types = new List <Type>();
var hasVoid = false;
for (var i = 0; i < tag.Children.Count; i++)
{
var type = ctx.GuessType(tag.Children[i]);
if (type.FullName == "System.Void")
{
hasVoid = true;
}
else
{
types.Add(type);
}
}
if (types.Count == 1)
{
return(types[0]);
}
if (types.Count == 0 && hasVoid)
{
return(typeof(void));
}
return(typeof(string));
}
/// <inheritdoc />
public override Func <TemplateParser, TokenCollection, ITag> BuildParseMethod()
{
return((parser, tc) =>
{
if (tc != null &&
parser != null &&
tc.Count > 3 &&
Utility.IsEqual(tc.First.Text, Field.KEY_IF))
{
if (tc[1].TokenKind == TokenKind.LeftParentheses &&
tc.Last.TokenKind == TokenKind.RightParentheses)
{
var tag = new IfTag();
var t = new ElseifTag();
TokenCollection coll = tc[2, -1];
t.Condition = parser.Read(coll);
t.FirstToken = coll.First;
//t.LastToken = coll.Last;
tag.AddChild(t);
while (parser.MoveNext())
{
if (parser.Current is EndTag)
{
tag.AddChild(parser.Current);
return tag;
}
else if (parser.Current is ElseifTag ||
parser.Current is ElseTag)
{
tag.AddChild(parser.Current);
}
else
{
tag.Children[tag.Children.Count - 1].AddChild(parser.Current);
}
}
throw new Exception.ParseException(string.Concat("if is not properly closed by a end tag:", tc), tc.First.BeginLine, tc.First.BeginColumn);
}
else
{
throw new Exception.ParseException(string.Concat("syntax error near if:", tc), tc.First.BeginLine, tc.First.BeginColumn);
}
}
return null;
});
}
/// <summary>
/// 分析标签
/// </summary>
/// <param name="parser">TemplateParser</param>
/// <param name="tc">Token集合</param>
/// <returns></returns>
public Tag Parse(TemplateParser parser, TokenCollection tc)
{
if (tc != null &&
parser != null &&
tc.Count > 3 &&
Common.Utility.IsEqual(tc.First.Text, Field.KEY_IF))
{
if (tc[1].TokenKind == TokenKind.LeftParentheses &&
tc.Last.TokenKind == TokenKind.RightParentheses)
{
IfTag tag = new IfTag();
ElseifTag t = new ElseifTag();
TokenCollection coll = new TokenCollection();
coll.Add(tc, 2, tc.Count - 2);
t.Test = parser.Read(coll);
t.FirstToken = coll.First;
//t.LastToken = coll.Last;
tag.AddChild(t);
while (parser.MoveNext())
{
if (parser.Current is EndTag)
{
tag.AddChild(parser.Current);
return(tag);
}
else if (parser.Current is ElseifTag ||
parser.Current is ElseTag)
{
tag.AddChild(parser.Current);
}
else
{
tag.Children[tag.Children.Count - 1].AddChild(parser.Current);
}
}
throw new Exception.ParseException(String.Concat("if is not properly closed by a end tag:", tc), tc.First.BeginLine, tc.First.BeginColumn);
}
else
{
throw new Exception.ParseException(String.Concat("syntax error near if:", tc), tc.First.BeginLine, tc.First.BeginColumn);
}
}
return(null);
}
/// <summary>
/// 分析标签
/// </summary>
/// <param name="parser">TemplateParser</param>
/// <param name="tc">Token集合</param>
/// <returns></returns>
public ITag Parse(TemplateParser parser, TokenCollection tc)
{
if (tc != null &&
parser != null &&
tc.Count > 3 &&
(Utility.IsEqual(tc.First.Text, Field.KEY_ELSEIF) || Utility.IsEqual(tc.First.Text, Field.KEY_ELIF)) &&
tc[1].TokenKind == TokenKind.LeftParentheses &&
tc.Last.TokenKind == TokenKind.RightParentheses)
{
ElseifTag tag = new ElseifTag();
TokenCollection coll = new TokenCollection();
tag.Test = parser.Read(tc[2, -1]);
return(tag);
//}
//else
//{
// throw new Exception.ParseException(string.Concat("syntax error near if:", tc), tc.First.BeginLine, tc.First.BeginColumn);
//}
}
return(null);
}
