/// <summary>
/// This can not handle all idtoken based expressions.
/// </summary>
/// <param name="current"></param>
/// <returns></returns>
public override bool CanHandle(Token current)
{
if (!(current.Kind == TokenKind.Ident)) return false;
var next = _tokenIt.Peek(1, false);
if (!(next.Token.Kind == TokenKind.Ident)) return false;
// Check if multi-word function name.
// e.g. "refill inventory"
// 1. Is it a function call?
var tokens = _tokenIt.PeekConsequetiveIdsAppendedWithTokenCounts(true, _tokenIt.LLK);
_result = FluentHelper.MatchFunctionName(_parser.Context, tokens);
// Validate.
// 1. The function must exist.
if (!_result.Exists) return false;
// 2. Only fluentscript functions support wildcard.
if (_result.FunctionMode != MemberMode.FunctionScript) return false;
// 3. Has wildcard flag must be turned on.
var sym = _parser.Context.Symbols.GetSymbol(_result.Name) as SymbolFunction;
var func = sym.FuncExpr as FunctionExpr;
//var func = _parser.Context.Functions.GetByName(_result.Name);
if (!func.Meta.HasWildCard) return false;
return true;
}
/// <summary>
/// This can not handle all idtoken based expressions.
/// </summary>
/// <param name="current"></param>
/// <returns></returns>
public override bool CanHandle(Token current)
{
if (!(current.Kind == TokenKind.Ident)) return false;
var next = _tokenIt.Peek(1, false);
if (!(next.Token.Kind == TokenKind.Ident)) return false;
// Check if multi-word function name.
var ids = _tokenIt.PeekConsequetiveIdsAppendedWithTokenCounts(true, _tokenIt.LLK);
_result = FluentHelper.MatchFunctionName(_parser.Context, ids);
return _result.Exists;
}
private bool CheckIfSingleIdentWildCard(List<Tuple<string, int>> tokens)
{
var first = tokens[0].Item1;
var isfunc = _parser.Context.Symbols.IsFunc(first);
if (isfunc)
{
var sym = _parser.Context.Symbols.GetSymbol(_result.Name) as SymbolFunction;
var func = sym.FuncExpr as FunctionExpr;
//var func = _parser.Context.Functions.GetByName(first);
if (func.Meta.HasWildCard)
{
_result = new FunctionLookupResult(true, first, MemberMode.FunctionScript) { TokenCount = 1 };
return true;
}
}
return false;
}
/// <summary>
/// Finds a matching script function name from the list of strings representing identifiers.
/// </summary>
/// <param name="ctx">The context of the script</param>
/// <param name="ids">List of strings representing identifier tokens</param>
/// <returns></returns>
public static FunctionLookupResult MatchFunctionName(Context ctx, List<Tuple<string,int>> ids)
{
var names = ids;
var foundFuncName = string.Empty;
var found = false;
var tokenCount = 0;
var memberMode = MemberMode.FunctionScript;
for( int ndx = ids.Count - 1; ndx >=0; ndx-- )
{
// "refill inventory"
var possible = ids[ndx];
string funcName = possible.Item1;
string funcNameWithUnderScores = funcName.Replace(' ', '_');
// Case 1: "refill inventory" - exists with spaces
if (ctx.Symbols.IsFunc(funcName))
{
foundFuncName = funcName;
}
// Case 2: "refill_inventory" - replace space with underscore.
else if (ctx.Symbols.IsFunc(funcNameWithUnderScores))
{
foundFuncName = funcNameWithUnderScores;
}
// Case 3: Check external functions
else if (ctx.ExternalFunctions.Contains(funcName))
{
memberMode = MemberMode.FunctionExternal;
foundFuncName = funcName;
}
if (!string.IsNullOrEmpty(foundFuncName))
{
found = true;
tokenCount = possible.Item2;
break;
}
}
// CASE 1: Not found
if (!found ) return FunctionLookupResult.False;
// CASE 2: Single word function
if ((found && tokenCount == 1) && memberMode == MemberMode.FunctionScript)
{
var sym = ctx.Symbols.GetSymbol(foundFuncName) as SymbolFunction;
var func = sym.FuncExpr as FunctionExpr;
//var func = ctx.Functions.GetByName(foundFuncName);
// If wildcard return true;
if (func.Meta.HasWildCard)
return new FunctionLookupResult(true, foundFuncName, memberMode) { TokenCount = tokenCount };
else
return FunctionLookupResult.False;
}
var result = new FunctionLookupResult()
{
Exists = found,
Name = foundFuncName,
FunctionMode = memberMode,
TokenCount = tokenCount
};
return result;
}