public Ast.BaseComment _GetComment(FtlParserStream ps)
{
// 0 - comment
// 1 - group comment
// 2 - resource comment
int level = -1;
var content = new StringBuilder();
while (true)
{
int i = -1;
while (ps.CurrentIs('#') && (i < (level == -1 ? 2 : level)))
{
ps.Next();
i++;
}
if (level == -1)
{
level = i;
}
if (!ps.IsPeekNewLine())
{
ps.ExpectChar(' ');
int ch;
while ((ch = ps.TakeChar(x => x != '\r' && x != '\n')) != Eof)
{
content.Append((char)ch);
}
}
if (ps.IsPeekNextLineComment(level))
{
content.Append('\n');
ps.SkipNewLine();
}
else
{
break;
}
}
var text = content.ToString();
switch (level)
{
case 0:
return(new Ast.Comment(text));
case 1:
return(new Ast.GroupComment(text));
case 2:
return(new Ast.ResourceComment(text));
}
throw new InvalidOperationException($"Unknown level value '{level}'");
}
Ast.Pattern _GetPattern(FtlParserStream ps)
{
var elements = new List <Ast.SyntaxNode>();
ps.SkipInlineWs();
int ch;
while ((ch = ps.Current) != Eof)
{
// The end condition for GetPattern's while loop is a newline
// which is not followed by a valid pattern continuation.
if (ps.IsPeekNewLine() && !ps.IsPeekNextLineValue())
{
break;
}
if (ch == '{')
{
var element = GetPlaceable(ps);
elements.Add(element);
}
else
{
var element = GetTextElement(ps);
elements.Add(element);
}
}
// Trim trailing whitespace.
if (elements.Count > 0 &&
elements[elements.Count - 1] is Ast.TextElement te)
{
te.Value = TrimRight(te.Value);
}
return(new Ast.Pattern(elements));
}