private DataSet RequirementsFilter(StructureToken structureToken, DataSet Followups)
{
return(Followups.Filter((x) => {
if (x.HasKey(StructureConsts.KEYWORD_FOLLOWEDBY, out DataValue followups))
{
if (followups.value != structureToken.StructType)
{
return false;
}
}
return true;
}));
}
private StructureToken ParseNext(DataSet allowedTokens)
{
Token token = m_TokenSet[m_Index++];
if (!CheckToken(allowedTokens, token, out DataSet potentials))
{
throw new System.Exception("I can't be anything.. T-T");
}
if (potentials.Length == 1)
{
// There is only one potential thing this token could be
// so we know exactly what we are without parsing the
// follow up tokens
StructureToken structureToken = new StructureToken(token);
structureToken.StructType = potentials[0].Name;
// How many types are there that are supposed to follow me?
DataSet Followups = GetFollowUps(potentials);
// If there is nothing that should follow me,
// then its the end of this tree structure
if (Followups.Length == 0)
{
return(structureToken);
}
// If this structure continues until another structure is found
// continue parsing children until the until value is met
if (potentials[0].HasKey(TokenConsts.KEYWORD_UNTIL, out DataValue until))
{
StructureToken structure;
do // EBIL
{
structure = ParseNext(Followups);
structureToken.Childs.Add(structure);
} while (structure.StructType != until.value);
// Return when we met the child ender
return(structureToken);
}
// Add the next token, leave
structureToken.Childs.Add(ParseNext(Followups));
return(structureToken);
}
// We can't be sure what we are, so we are going
// to parse the next token first.
StructureToken nextToken = ParseNext(GetFollowUps(potentials));
// When this token is parsed, check what I could have been with
// the type the next tokend became.
DataSet set = RequirementsFilter(nextToken, potentials);
// If we have only one thing we could have been at this point, hurray!
// we know what we are.
if (set.Length == 1)
{
StructureToken structureToken = new StructureToken(token);
structureToken.StructType = set[0].Name;
structureToken.Childs.Add(nextToken);
// If this structure continues until another structure is found
// continue parsing children until the until value is met
if (set[0].HasKey(TokenConsts.KEYWORD_UNTIL, out DataValue until))
{
StructureToken structure;
do // EBIL
{
structure = ParseNext(set);
structureToken.Childs.Add(structure);
} while (structure.StructType != until.value);
// Return when we met the child ender
return(structureToken);
}
return(structureToken);
}
throw new System.Exception("Parsed next token and I atill have no idea what I am T-T");
}