protected override MatchContext Match(Ust ust, MatchContext context)
{
var matchedTextSpans = new List <TextSpan>();
bool success = false;
foreach (PatternUst pattern in Patterns)
{
var altContext = MatchContext.CreateWithInputParamsAndVars(context);
MatchContext match = pattern.MatchUst(ust, altContext);
if (match.Success)
{
success = true;
matchedTextSpans.AddRange(match.Locations);
if (!context.FindAllAlternatives)
{
break;
}
}
}
return(success
? context.AddMatches(matchedTextSpans)
: context.Fail());
}
private MatchContext EnumerateVarsOrFields(List <AssignmentExpression> variables, MatchContext context)
{
var matchedTextSpans = new List <TextSpan>();
bool success = false;
foreach (AssignmentExpression variable in variables)
{
var altContext = MatchContext.CreateWithInputParamsAndVars(context);
MatchContext match;
if (Assignment.Right != null)
{
match = Assignment.MatchUst(variable, altContext);
}
else
{
match = Assignment.Left.MatchUst(variable.Left, altContext);
}
if (match.Success)
{
success = true;
matchedTextSpans.AddRange(match.Locations);
if (!context.FindAllAlternatives)
{
break;
}
}
}
if (success)
{
context = context.AddMatches(matchedTextSpans);
}
else
{
context = context.Fail();
}
return(context);
}
public override MatchContext Match(Ust ust, MatchContext context)
{
var blockStatement = ust as BlockStatement;
if (blockStatement == null ||
(!(blockStatement.Parent is MethodDeclaration) &&
!(blockStatement.Parent is ConstructorDeclaration) &&
!(blockStatement.Parent is NamespaceDeclaration) &&
!(blockStatement.Parent is RootUst)))
{
return(context.Fail());
}
MatchContext newContext = MatchContext.CreateWithInputParamsAndVars(context);
if (Statements == null || Statements.Count == 0)
{
if (blockStatement.Statements == null || blockStatement.Statements.Count == 0)
{
newContext = newContext.AddMatch(blockStatement);
}
else
{
return(context.Fail());
}
}
else
{
IEnumerable <Statement> statements = blockStatement.Statements
.Where(statement =>
!(statement is TypeDeclarationStatement) &&
!(statement is WrapperStatement));
Expression[] expressions = statements.SelectMany(statement =>
statement
.WhereDescendants(descendant =>
descendant is Expression expressionDescendant &&
!(expressionDescendant is Token)))
.Cast <Expression>()
.ToArray();
var matchedTextSpans = new List <TextSpan>();
int patternStatementInd = 0;
bool success = false;
for (int i = 0; i < expressions.Length; i++)
{
newContext = MatchContext.CreateWithInputParamsAndVars(newContext);
newContext = Statements[patternStatementInd].MatchUst(expressions[i], newContext);
if (newContext.Success)
{
matchedTextSpans.AddRange(newContext.Locations);
patternStatementInd += 1;
if (patternStatementInd == Statements.Count)
{
success = true;
patternStatementInd = 0;
}
}
}
if (success)
{
context = context.AddMatches(matchedTextSpans);
}
else
{
context = context.Fail();
}
}
return(context);
}
protected override MatchContext Match(Ust ust, MatchContext context)
{
var argsUst = ust as ArgsUst;
if (argsUst == null)
{
return(context.Fail());
}
List <Expression> args = argsUst.Collection;
MatchContext newContext = MatchContext.CreateWithInputParamsAndVars(context);
var matchedTextSpans = new List <TextSpan>();
int patternArgInd = 0;
int argInd = 0;
while (argInd < args.Count)
{
if (patternArgInd >= Args.Count)
{
break;
}
newContext = MatchContext.CreateWithInputParamsAndVars(newContext);
if (Args[patternArgInd] is PatternMultipleExpressions)
{
if (patternArgInd + 1 < Args.Count)
{
Expression arg = UstUtils.GetArgWithoutModifier(args[argInd]);
newContext = Args[patternArgInd + 1].MatchUst(arg, newContext);
matchedTextSpans.AddRange(newContext.Locations);
if (newContext.Success)
{
patternArgInd += 2;
}
}
else
{
matchedTextSpans.AddRange(newContext.Locations);
}
argInd += 1;
}
else
{
Expression arg = UstUtils.GetArgWithoutModifier(args[argInd]);
newContext = Args[patternArgInd].MatchUst(arg, newContext);
if (!newContext.Success)
{
break;
}
matchedTextSpans.AddRange(newContext.Locations);
patternArgInd += 1;
argInd += 1;
}
}
if (patternArgInd < Args.Count && Args[patternArgInd] is PatternMultipleExpressions)
{
patternArgInd += 1;
}
newContext = argInd != args.Count || patternArgInd != Args.Count
? context.Fail()
: context.AddMatches(matchedTextSpans);
return(newContext.AddUstIfSuccess(argsUst));
}
public override MatchContext Match(ArgsUst argsUst, MatchContext context)
{
MatchContext newContext;
List <Expression> args = argsUst.Collection;
newContext = MatchContext.CreateWithInputParamsAndVars(context);
var matchedTextSpans = new List <TextSpan>();
int patternArgInd = 0;
int argInd = 0;
while (argInd < args.Count)
{
if (patternArgInd >= Args.Count)
{
break;
}
newContext = MatchContext.CreateWithInputParamsAndVars(newContext);
if (Args[patternArgInd] is PatternMultipleExpressions multiExprArg)
{
if (patternArgInd + 1 < Args.Count)
{
newContext = Args[patternArgInd + 1].MatchUst(args[argInd], newContext);
matchedTextSpans.AddRange(newContext.Locations);
if (newContext.Success)
{
patternArgInd += 2;
}
}
else
{
matchedTextSpans.AddRange(newContext.Locations);
}
argInd += 1;
}
else
{
newContext = Args[patternArgInd].MatchUst(args[argInd], newContext);
if (!newContext.Success)
{
break;
}
else
{
matchedTextSpans.AddRange(newContext.Locations);
}
patternArgInd += 1;
argInd += 1;
}
}
if (patternArgInd < Args.Count && Args[patternArgInd] is PatternMultipleExpressions)
{
patternArgInd += 1;
}
if (argInd != args.Count || patternArgInd != Args.Count)
{
newContext = context.Fail();
}
else
{
newContext = context.AddMatches(matchedTextSpans);
}
return(newContext.AddUstIfSuccess(argsUst));
}