Updated for PR

dsymbol/src/dsymbol/conversion/second.d

@@ -146,7 +146,8 @@ do
 	{
 		if (moduleSymbol is null)
 		{
-			DeferredSymbol* deferred = DeferredSymbolsAllocator.instance.make!DeferredSymbol(acSymbol);
+			DeferredSymbol* deferred = DeferredSymbolsAllocator.instance.make!DeferredSymbol(
+				acSymbol);
 			cache.deferredSymbols.insert(deferred);
 		}
 		else
@@ -188,8 +189,8 @@ do
 		}
 		if (!isArr && !isAssoc && !isFunction)
 			break;
-		immutable qualifier = isAssoc ? SymbolQualifier.assocArray :
-			(isFunction ? SymbolQualifier.func : SymbolQualifier.array);
+		immutable qualifier = isAssoc ? SymbolQualifier.assocArray
+			: (isFunction ? SymbolQualifier.func : SymbolQualifier.array);
 		lastSuffix = GCAllocator.instance.make!DSymbol(back, CompletionKind.dummy, lastSuffix);
 		lastSuffix.qualifier = qualifier;
 		lastSuffix.ownType = true;
@@ -355,6 +356,7 @@ void resolveAliasThis(DSymbol* symbol,
 	ref TypeLookups typeLookups, Scope* moduleScope, ref ModuleCache cache)
 {
 	import std.algorithm : filter;
+	import std.array : array;
 
 	foreach (aliasThis; typeLookups[].filter!(a => a.kind == TypeLookupKind.aliasThis))
 	{
@@ -363,7 +365,7 @@ void resolveAliasThis(DSymbol* symbol,
 		if (parts.length == 0 || parts[0].type is null)
 			continue;
 
-		symbol.aliasThisSymbol = parts[0];
+		symbol.aliasThisSymbols ~= parts;
 
 		DSymbol* s = GCAllocator.instance.make!DSymbol(IMPORT_SYMBOL_NAME,
 			CompletionKind.importSymbol, parts[0].type);
@@ -430,7 +432,6 @@ void resolveType(DSymbol* symbol, ref TypeLookups typeLookups,
 		assert(false, "How did this happen?");
 }
 
-
 void resolveTypeFromInitializer(DSymbol* symbol, TypeLookup* lookup,
 	Scope* moduleScope, ref ModuleCache cache)
 {
@@ -450,8 +451,7 @@ void resolveTypeFromInitializer(DSymbol* symbol, TypeLookup* lookup,
 			if (currentSymbol is null)
 				return;
 		}
-		else
-		if (crumb == ARRAY_LITERAL_SYMBOL_NAME)
+		else if (crumb == ARRAY_LITERAL_SYMBOL_NAME)
 		{
 			auto arr = GCAllocator.instance.make!(DSymbol)(ARRAY_LITERAL_SYMBOL_NAME, CompletionKind.dummy, currentSymbol);
 			arr.qualifier = SymbolQualifier.array;

dsymbol/src/dsymbol/symbol.d

@@ -375,8 +375,8 @@ struct DSymbol
 	// TODO: assert that the type is not a function
 	DSymbol* type;
 
-	// Is using alias this
-	DSymbol* aliasThisSymbol;
+	// Is alias this symbols
+	DSymbol*[] aliasThisSymbols;
 	/**
 	 * Names of function arguments
 	 */

src/dcd/server/autocomplete/ufcs.d

@@ -129,13 +129,18 @@ bool willImplicitBeUpcasted(string from, string to)
     return INTEGER_PROMOTIONS[from] == to;
 }
 
-bool matchAliasThis(const(DSymbol)* aliasThisSymbol, const(DSymbol)* incomingSymbol)
+bool matchAliasThis(const(DSymbol)* beforeDotType, const(DSymbol)* incomingSymbol)
+{
+    // For now we are only resolving the first alias this symbol
+    // when multiple alias this are supported, we can rethink another solution
+    if (!beforeDotType.aliasThisSymbols
+        || !beforeDotType.aliasThisSymbols.front
+        || beforeDotType.aliasThisSymbols.front == beforeDotType)
     {
-    if(aliasThisSymbol) {
-        return isCallableWithArg(incomingSymbol, aliasThisSymbol.type);
-    }
         return false;
     }
+    return isCallableWithArg(incomingSymbol, beforeDotType.aliasThisSymbols.front.type);
+}
 
 /**
  * Params:
@@ -158,8 +163,9 @@ bool isCallableWithArg(const(DSymbol)* incomingSymbol, const(DSymbol)* beforeDot
         .functionParameters.empty)
     {
         return beforeDotType is incomingSymbol.functionParameters.front.type
-            || willImplicitBeUpcasted(beforeDotType.name, incomingSymbol.functionParameters.front.type.name) 
-            || matchAliasThis(beforeDotType.aliasThisSymbol, incomingSymbol);
+            || willImplicitBeUpcasted(beforeDotType.name, incomingSymbol
+                    .functionParameters.front.type.name)
+            || matchAliasThis(beforeDotType, incomingSymbol);
 
     }
 
@@ -208,12 +214,14 @@ bool doUFCSSearch(string beforeToken, string lastToken)
 
 void getUFCSParenCompletion(ref DSymbol*[] symbols, Scope* completionScope, istring firstToken, istring nextToken, size_t cursorPosition)
 {
-    DSymbol* firstSymbol = completionScope.getFirstSymbolByNameAndCursor(firstToken, cursorPosition);
+    DSymbol* firstSymbol = completionScope.getFirstSymbolByNameAndCursor(
+        firstToken, cursorPosition);
 
     if (firstSymbol is null)
         return;
 
-    DSymbol*[] possibleUFCSSymbol = completionScope.getSymbolsByNameAndCursor(nextToken, cursorPosition);
+    DSymbol*[] possibleUFCSSymbol = completionScope.getSymbolsByNameAndCursor(
+        nextToken, cursorPosition);
     foreach (nextSymbol; possibleUFCSSymbol)
     {
         if (nextSymbol && nextSymbol.functionParameters)

tests/tc_ufcs_struct_completion/expected_aliased_struct_test.txt

@@ -7,6 +7,7 @@ min	k
 sizeof	k
 stringof	k
 tupleof	k
+ufcsExactAliasedType	F
 ufcsSomeInt	F
 ufcsSomeShort	F
 x	v

tests/tc_ufcs_struct_completion/fooutils/fooutils.d

@@ -20,4 +20,5 @@ void ufcsBarScope(ref scope Foo foo, string mama) {}
 void ufcsBarReturnScope(return scope Foo foo, string mama) {}
 void ufcsSomeInt(int x) {}
 void ufcsSomeShort(short x) {}
+void ufcsExactAliasedType(IntAliased x) {}
 private void ufcsBarPrivate(Foo foo, string message) {}