public static TomlTable TryApply(TomlTable current, TomlTable.RootTable root, TokenBuffer tokens)
{
tokens.ConsumeAllNewlines();
var preComments = CommentProduction.TryParsePreExpressionCommenst(tokens);
var expressionToken = tokens.Peek();
tokens.ConsumeAllNewlines();
var arrayKeyChain = TomlArrayTableProduction.TryApply(tokens);
if (arrayKeyChain != null)
{
var addTo = GetTargetTable(root, arrayKeyChain, CreateImplicitelyType.Table);
var arr = GetExistingOrCreateAndAdd(addTo, arrayKeyChain.Last(), errorPosition: expressionToken);
arr.Comments.AddRange(preComments);
arr.Comments.AddRange(CommentProduction.TryParseAppendExpressionComments(expressionToken, tokens));
var newArrayEntry = new TomlTable(root);
arr.Add(newArrayEntry);
return(newArrayEntry);
}
var tableKeyChain = TomlTableProduction.TryApply(tokens);
if (tableKeyChain != null)
{
var newTable = new TomlTable(root)
{
IsDefined = true
};
newTable.Comments.AddRange(preComments);
newTable.Comments.AddRange(CommentProduction.TryParseAppendExpressionComments(expressionToken, tokens));
var addTo = GetTargetTable(root, tableKeyChain, CreateImplicitelyType.Table);
var key = tableKeyChain.Last();
var existingRow = addTo.TryGetValue(key);
if (existingRow == null)
{
addTo.AddRow(key, newTable);
}
else
{
var tbl = existingRow as TomlTable;
if (tbl.IsDefined)
{
throw new Exception($"Failed to add new table because the target table already contains a row with the key '{key}' of type '{existingRow.ReadableTypeName}'.");
}
else
{
tbl.IsDefined = true;
return(tbl);
}
}
return(newTable);
}
if (!tokens.End)
{
var kvp = KeyValuePairProduction.Apply(root, tokens);
if (kvp != null)
{
kvp.Item2.Comments.AddRange(preComments);
kvp.Item2.Comments.AddRange(CommentProduction.TryParseAppendExpressionComments(expressionToken, tokens));
current.AddRow(kvp.Item1, kvp.Item2);
return(current);
}
}
root.Comments.AddRange(preComments);
return(null);
}
private static TomlArray ParseTomlArray(ITomlRoot root, TokenBuffer tokens)
{
TomlArray a;
var prep = CommentProduction.TryParseComments(tokens, CommentLocation.Prepend).ToList();
tokens.ExpectAndConsume(TokenType.LBrac);
using (tokens.UseIgnoreNewlinesContext())
{
prep.AddRange(CommentProduction.TryParseComments(tokens, CommentLocation.Prepend));
if (tokens.TryExpect(TokenType.RBrac))
{
// Empty array handled inside this if, else part can assume the array has values
// Comments in an empty array are moved before the array at the moment.
// There currently does not exist a comment location that will allow to write this comments correctly
// => Parse the real items correctly and do not create a parse error, but the comment will get lost
// on the next write.
tokens.Consume();
a = new TomlArray(root);
a.Comments.AddRange(prep);
return(a);
}
else
{
List <TomlValue> values = new List <TomlValue>();
// Parse first !required! array value
var v = ParseArrayValue();
v.Comments.AddRange(prep);
values.Add(v);
while (!tokens.TryExpect(TokenType.RBrac))
{
if (!tokens.TryExpectAndConsume(TokenType.Comma))
{
throw Parser.CreateParseError(tokens.Peek(), "Array not closed.");
}
// This comment is misplaced as we simply append it to the last value, but it does not belong to it
// Comments processing needs some tweaking/redesign in the future.
v.Comments.AddRange(CommentProduction.TryParseComments(tokens, CommentLocation.Append));
if (!tokens.TryExpect(TokenType.RBrac))
{
var et = tokens.Peek();
v = ParseArrayValue();
if (v.GetType() != values[0].GetType())
{
throw Parser.CreateParseError(et, $"Expected array value of type '{values[0].ReadableTypeName}' but value of type '{v.ReadableTypeName}' was found.");
}
values.Add(v);
}
}
a = new TomlArray(root, values.ToArray());
}
a.Last().Comments.AddRange(CommentProduction.TryParseComments(tokens, CommentLocation.Append));
tokens.ExpectAndConsume(TokenType.RBrac);
a.Comments.AddRange(CommentProduction.TryParseComments(tokens, CommentLocation.Append));
TomlValue ParseArrayValue()
{
var prepComments = CommentProduction.TryParseComments(tokens, CommentLocation.Prepend);
var valueParseErrorPos = tokens.Peek();
var value = ParseTomlValue(root, tokens);
if (value == null)
{
throw Parser.CreateParseError(valueParseErrorPos, $"Array value is missing.");
}
value.Comments.AddRange(prepComments);
value.Comments.AddRange(CommentProduction.TryParseComments(tokens, CommentLocation.Append));
return(value);
}
}
return(a);
}