Add handling for 2-3 invalid overload candidates

internal/checker/checker.go

@@ -8990,6 +8990,7 @@ func (c *Checker) isSignatureApplicable(node *ast.Node, args []*ast.Node, signat
 			}
 		}
 	}
+
 	if restType != nil {
 		spreadType := c.getSpreadArgumentType(args, argCount, len(args), restType, nil /*context*/, checkMode)
 		restArgCount := len(args) - argCount
@@ -9330,22 +9331,94 @@ func (c *Checker) tryGetRestTypeOfSignature(signature *Signature) *Type {
 func (c *Checker) reportCallResolutionErrors(node *ast.Node, s *CallState, signatures []*Signature, headMessage *diagnostics.Message) {
 	switch {
 	case len(s.candidatesForArgumentError) != 0:
-		last := s.candidatesForArgumentError[len(s.candidatesForArgumentError)-1]
-		var diags []*ast.Diagnostic
-		c.isSignatureApplicable(s.node, s.args, last, c.assignableRelation, CheckModeNormal, true /*reportErrors*/, nil /*inferenceContext*/, &diags)
-		for _, diagnostic := range diags {
-			if len(s.candidatesForArgumentError) > 1 {
-				diagnostic = ast.NewDiagnosticChain(diagnostic, diagnostics.The_last_overload_gave_the_following_error)
-				diagnostic = ast.NewDiagnosticChain(diagnostic, diagnostics.No_overload_matches_this_call)
+		if len(s.candidatesForArgumentError) == 1 || len(s.candidatesForArgumentError) > 3 {
+			last := s.candidatesForArgumentError[len(s.candidatesForArgumentError)-1]
+			var diags []*ast.Diagnostic
+			c.isSignatureApplicable(s.node, s.args, last, c.assignableRelation, CheckModeNormal, true /*reportErrors*/, nil /*inferenceContext*/, &diags)
+			for _, diagnostic := range diags {
+				if len(s.candidatesForArgumentError) > 3 {
+					diagnostic = ast.NewDiagnosticChain(diagnostic, diagnostics.The_last_overload_gave_the_following_error)
+					diagnostic = ast.NewDiagnosticChain(diagnostic, diagnostics.No_overload_matches_this_call)
+				}
+				if headMessage != nil {
+					diagnostic = ast.NewDiagnosticChain(diagnostic, headMessage)
+				}
+				if last.declaration != nil && len(s.candidatesForArgumentError) > 3 {
+					diagnostic.AddRelatedInfo(NewDiagnosticForNode(last.declaration, diagnostics.The_last_overload_is_declared_here))
+				}
+				c.addImplementationSuccessElaboration(s, last, diagnostic)
+				c.diagnostics.Add(diagnostic)
 			}
-			if headMessage != nil {
-				diagnostic = ast.NewDiagnosticChain(diagnostic, headMessage)
+		} else {
+			// 2-3 candidates: show detailed errors for each individual overload
+			var allDiagnostics [][]*ast.Diagnostic
+			maxDiagCount := 0
+			minDiagCount := int(^uint(0) >> 1) // Max int value
+			minIndex := 0
+
+			for i, candidate := range s.candidatesForArgumentError {
+				var originalDiags []*ast.Diagnostic
+				c.isSignatureApplicable(s.node, s.args, candidate, c.assignableRelation, CheckModeNormal, true, nil, &originalDiags)
+
+				if len(originalDiags) > 0 {
+					chainedDiag := ast.NewDiagnosticChain(originalDiags[0], diagnostics.Overload_0_of_1_2_gave_the_following_error, i+1, len(s.candidates), c.signatureToString(candidate))
+					for j := 1; j < len(originalDiags); j++ {
+						chainedDiag.AddMessageChain(originalDiags[j])
+					}
+					diags := []*ast.Diagnostic{chainedDiag}
+
+					if len(originalDiags) <= minDiagCount {
+						minDiagCount = len(originalDiags)
+						minIndex = len(allDiagnostics)
+					}
+					maxDiagCount = max(maxDiagCount, len(originalDiags))
+					allDiagnostics = append(allDiagnostics, diags)
+				}
 			}
-			if last.declaration != nil && len(s.candidatesForArgumentError) > 1 {
-				diagnostic.AddRelatedInfo(NewDiagnosticForNode(last.declaration, diagnostics.The_last_overload_is_declared_here))
+
+			var diagsToShow []*ast.Diagnostic
+			if maxDiagCount > 1 {
+				diagsToShow = allDiagnostics[minIndex]
+			} else {
+				diagsToShow = core.Flatten(allDiagnostics)
+			}
+
+			if len(diagsToShow) > 0 {
+				var allRelatedInfo []*ast.Diagnostic
+				for _, diag := range diagsToShow {
+					allRelatedInfo = append(allRelatedInfo, diag.RelatedInformation()...)
+				}
+
+				mainDiag := ast.NewDiagnosticChain(diagsToShow[0], diagnostics.No_overload_matches_this_call)
+				for i := 1; i < len(diagsToShow); i++ {
+					mainDiag.AddMessageChain(diagsToShow[i])
+				}
+
+				if headMessage != nil {
+					mainDiag = ast.NewDiagnosticChain(mainDiag, headMessage)
+				}
+
+				allSameSpan := len(diagsToShow) > 0
+				if allSameSpan {
+					first := diagsToShow[0]
+					for i := 1; i < len(diagsToShow); i++ {
+						d := diagsToShow[i]
+						if d.File() != first.File() || d.Loc().Pos() != first.Loc().Pos() || d.Loc().Len() != first.Loc().Len() {
+							allSameSpan = false
+							break
+						}
+					}
+				}
+
+				if allSameSpan {
+					mainDiag.SetRelatedInfo(allRelatedInfo)
+				} else {
+					mainDiag = createDiagnosticForNodeFromMessageChain(ast.GetSourceFileOfNode(s.node), getErrorNodeForCallNode(s.node), mainDiag, allRelatedInfo)
+				}
+
+				c.addImplementationSuccessElaboration(s, s.candidatesForArgumentError[0], mainDiag)
+				c.diagnostics.Add(mainDiag)
 			}
-			c.addImplementationSuccessElaboration(s, last, diagnostic)
-			c.diagnostics.Add(diagnostic)
 		}
 	case s.candidateForArgumentArityError != nil:
 		c.diagnostics.Add(c.getArgumentArityError(s.node, []*Signature{s.candidateForArgumentArityError}, s.args, headMessage))

internal/checker/utilities.go

@@ -35,6 +35,25 @@ func NewDiagnosticChainForNode(chain *ast.Diagnostic, node *ast.Node, message *d
 	return NewDiagnosticForNode(node, message, args...)
 }
 
+func createDiagnosticForNodeFromMessageChain(sourceFile *ast.SourceFile, node *ast.Node, messageChain *ast.Diagnostic, relatedInformation []*ast.Diagnostic) *ast.Diagnostic {
+	if node == nil || messageChain == nil {
+		return messageChain
+	}
+
+	loc := binder.GetErrorRangeForNode(sourceFile, node)
+
+	diagnostic := &ast.Diagnostic{}
+	*diagnostic = *messageChain
+	diagnostic.SetFile(sourceFile)
+	diagnostic.SetLocation(loc)
+
+	if relatedInformation != nil {
+		diagnostic.SetRelatedInfo(relatedInformation)
+	}
+
+	return diagnostic
+}
+
 func findInMap[K comparable, V any](m map[K]V, predicate func(V) bool) V {
 	for _, value := range m {
 		if predicate(value) {

testdata/baselines/reference/submodule/compiler/constructorOverloads1.errors.txt

@@ -3,10 +3,14 @@ constructorOverloads1.ts(3,5): error TS2392: Multiple constructor implementation
 constructorOverloads1.ts(4,5): error TS2392: Multiple constructor implementations are not allowed.
 constructorOverloads1.ts(7,5): error TS2392: Multiple constructor implementations are not allowed.
 constructorOverloads1.ts(16,18): error TS2769: No overload matches this call.
-  The last overload gave the following error.
+  Overload 1 of 2, 'new (s: string): Foo', gave the following error.
+    Argument of type 'Foo' is not assignable to parameter of type 'string'.
+  Overload 2 of 2, 'new (n: number): Foo', gave the following error.
     Argument of type 'Foo' is not assignable to parameter of type 'number'.
 constructorOverloads1.ts(17,18): error TS2769: No overload matches this call.
-  The last overload gave the following error.
+  Overload 1 of 2, 'new (s: string): Foo', gave the following error.
+    Argument of type 'Foo[]' is not assignable to parameter of type 'string'.
+  Overload 2 of 2, 'new (n: number): Foo', gave the following error.
     Argument of type 'Foo[]' is not assignable to parameter of type 'number'.
 
 
@@ -37,16 +41,18 @@ constructorOverloads1.ts(17,18): error TS2769: No overload matches this call.
     var f3 = new Foo(f1);
                      ~~
 !!! error TS2769: No overload matches this call.
-!!! error TS2769:   The last overload gave the following error.
+!!! error TS2769:   Overload 1 of 2, 'new (s: string): Foo', gave the following error.
+!!! error TS2769:     Argument of type 'Foo' is not assignable to parameter of type 'string'.
+!!! error TS2769:   Overload 2 of 2, 'new (n: number): Foo', gave the following error.
 !!! error TS2769:     Argument of type 'Foo' is not assignable to parameter of type 'number'.
-!!! related TS2771 constructorOverloads1.ts:3:5: The last overload is declared here.
 !!! related TS2793 constructorOverloads1.ts:4:5: The call would have succeeded against this implementation, but implementation signatures of overloads are not externally visible.
     var f4 = new Foo([f1,f2,f3]);
                      ~~~~~~~~~~
 !!! error TS2769: No overload matches this call.
-!!! error TS2769:   The last overload gave the following error.
+!!! error TS2769:   Overload 1 of 2, 'new (s: string): Foo', gave the following error.
+!!! error TS2769:     Argument of type 'Foo[]' is not assignable to parameter of type 'string'.
+!!! error TS2769:   Overload 2 of 2, 'new (n: number): Foo', gave the following error.
 !!! error TS2769:     Argument of type 'Foo[]' is not assignable to parameter of type 'number'.
-!!! related TS2771 constructorOverloads1.ts:3:5: The last overload is declared here.
 !!! related TS2793 constructorOverloads1.ts:4:5: The call would have succeeded against this implementation, but implementation signatures of overloads are not externally visible.
 
     f1.bar1();

testdata/baselines/reference/submodule/compiler/constructorOverloads1.errors.txt.diff

@@ -5,38 +5,39 @@
  constructorOverloads1.ts(7,5): error TS2392: Multiple constructor implementations are not allowed.
  constructorOverloads1.ts(16,18): error TS2769: No overload matches this call.
 -  Overload 1 of 2, '(s: string): Foo', gave the following error.
--    Argument of type 'Foo' is not assignable to parameter of type 'string'.
++  Overload 1 of 2, 'new (s: string): Foo', gave the following error.
+     Argument of type 'Foo' is not assignable to parameter of type 'string'.
 -  Overload 2 of 2, '(n: number): Foo', gave the following error.
-+  The last overload gave the following error.
++  Overload 2 of 2, 'new (n: number): Foo', gave the following error.
      Argument of type 'Foo' is not assignable to parameter of type 'number'.
  constructorOverloads1.ts(17,18): error TS2769: No overload matches this call.
 -  Overload 1 of 2, '(s: string): Foo', gave the following error.
--    Argument of type 'Foo[]' is not assignable to parameter of type 'string'.
++  Overload 1 of 2, 'new (s: string): Foo', gave the following error.
+     Argument of type 'Foo[]' is not assignable to parameter of type 'string'.
 -  Overload 2 of 2, '(n: number): Foo', gave the following error.
-+  The last overload gave the following error.
++  Overload 2 of 2, 'new (n: number): Foo', gave the following error.
      Argument of type 'Foo[]' is not assignable to parameter of type 'number'.
 
 
-@@= skipped -38, +34 lines =@@
+@@= skipped -38, +38 lines =@@
      var f3 = new Foo(f1);
                       ~~
  !!! error TS2769: No overload matches this call.
 -!!! error TS2769:   Overload 1 of 2, '(s: string): Foo', gave the following error.
--!!! error TS2769:     Argument of type 'Foo' is not assignable to parameter of type 'string'.
++!!! error TS2769:   Overload 1 of 2, 'new (s: string): Foo', gave the following error.
+ !!! error TS2769:     Argument of type 'Foo' is not assignable to parameter of type 'string'.
 -!!! error TS2769:   Overload 2 of 2, '(n: number): Foo', gave the following error.
-+!!! error TS2769:   The last overload gave the following error.
++!!! error TS2769:   Overload 2 of 2, 'new (n: number): Foo', gave the following error.
  !!! error TS2769:     Argument of type 'Foo' is not assignable to parameter of type 'number'.
-+!!! related TS2771 constructorOverloads1.ts:3:5: The last overload is declared here.
  !!! related TS2793 constructorOverloads1.ts:4:5: The call would have succeeded against this implementation, but implementation signatures of overloads are not externally visible.
      var f4 = new Foo([f1,f2,f3]);
                       ~~~~~~~~~~
  !!! error TS2769: No overload matches this call.
 -!!! error TS2769:   Overload 1 of 2, '(s: string): Foo', gave the following error.
--!!! error TS2769:     Argument of type 'Foo[]' is not assignable to parameter of type 'string'.
++!!! error TS2769:   Overload 1 of 2, 'new (s: string): Foo', gave the following error.
+ !!! error TS2769:     Argument of type 'Foo[]' is not assignable to parameter of type 'string'.
 -!!! error TS2769:   Overload 2 of 2, '(n: number): Foo', gave the following error.
-+!!! error TS2769:   The last overload gave the following error.
++!!! error TS2769:   Overload 2 of 2, 'new (n: number): Foo', gave the following error.
  !!! error TS2769:     Argument of type 'Foo[]' is not assignable to parameter of type 'number'.
-+!!! related TS2771 constructorOverloads1.ts:3:5: The last overload is declared here.
  !!! related TS2793 constructorOverloads1.ts:4:5: The call would have succeeded against this implementation, but implementation signatures of overloads are not externally visible.
-
-     f1.bar1();
+

testdata/baselines/reference/submodule/compiler/destructuringTuple.errors.txt

@@ -1,10 +1,14 @@
 destructuringTuple.ts(11,7): error TS2461: Type 'number' is not an array type.
 destructuringTuple.ts(11,48): error TS2769: No overload matches this call.
-  The last overload gave the following error.
+  Overload 1 of 3, '(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: number[]) => number, initialValue: number): number', gave the following error.
+    Type 'never[]' is not assignable to type 'number'.
+  Overload 2 of 3, '(callbackfn: (previousValue: [], currentValue: number, currentIndex: number, array: number[]) => [], initialValue: []): []', gave the following error.
     Type 'never[]' is not assignable to type '[]'.
       Target allows only 0 element(s) but source may have more.
 destructuringTuple.ts(11,60): error TS2769: No overload matches this call.
-  The last overload gave the following error.
+  Overload 1 of 2, '(...items: ConcatArray<never>[]): never[]', gave the following error.
+    Argument of type 'number' is not assignable to parameter of type 'ConcatArray<never>'.
+  Overload 2 of 2, '(...items: ConcatArray<never>[]): never[]', gave the following error.
     Argument of type 'number' is not assignable to parameter of type 'ConcatArray<never>'.
 
 
@@ -24,16 +28,19 @@ destructuringTuple.ts(11,60): error TS2769: No overload matches this call.
 !!! error TS2461: Type 'number' is not an array type.
                                                    ~~~~~~~~~~~~~~~
 !!! error TS2769: No overload matches this call.
-!!! error TS2769:   The last overload gave the following error.
+!!! error TS2769:   Overload 1 of 3, '(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: number[]) => number, initialValue: number): number', gave the following error.
+!!! error TS2769:     Type 'never[]' is not assignable to type 'number'.
+!!! error TS2769:   Overload 2 of 3, '(callbackfn: (previousValue: [], currentValue: number, currentIndex: number, array: number[]) => [], initialValue: []): []', gave the following error.
 !!! error TS2769:     Type 'never[]' is not assignable to type '[]'.
 !!! error TS2769:       Target allows only 0 element(s) but source may have more.
 !!! related TS6502 lib.es5.d.ts:--:--: The expected type comes from the return type of this signature.
-!!! related TS2771 lib.es5.d.ts:--:--: The last overload is declared here.
+!!! related TS6502 lib.es5.d.ts:--:--: The expected type comes from the return type of this signature.
                                                                ~~
 !!! error TS2769: No overload matches this call.
-!!! error TS2769:   The last overload gave the following error.
+!!! error TS2769:   Overload 1 of 2, '(...items: ConcatArray<never>[]): never[]', gave the following error.
+!!! error TS2769:     Argument of type 'number' is not assignable to parameter of type 'ConcatArray<never>'.
+!!! error TS2769:   Overload 2 of 2, '(...items: ConcatArray<never>[]): never[]', gave the following error.
 !!! error TS2769:     Argument of type 'number' is not assignable to parameter of type 'ConcatArray<never>'.
-!!! related TS2771 lib.es5.d.ts:--:--: The last overload is declared here.
 
     const [oops2] = [1, 2, 3].reduce((acc: number[], e) => acc.concat(e), []);