Improve TypeError messages from failed array conversions.

Source/bindings/scripts/code_generator_v8.pm

 # Copyright (C) 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
 # Copyright (C) 2006 Anders Carlsson <andersca@mac.com>
 # Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
 # Copyright (C) 2006 Alexey Proskuryakov <ap@webkit.org>
 # Copyright (C) 2006 Apple Computer, Inc.
 # Copyright (C) 2007, 2008, 2009, 2012 Google Inc.
 # Copyright (C) 2009 Cameron McCormack <cam@mcc.id.au>
 # Copyright (C) Research In Motion Limited 2010. All rights reserved.
 # Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
 # Copyright (C) 2012 Ericsson AB. All rights reserved.
@@ skipping 1890 matching lines @@
         }
     }
 
     my $nativeType = GetNativeType($attribute->type, $attribute->extendedAttributes, "parameter");
     if ($attribute->type eq "EventHandler") {
         if ($interface->name eq "Window") {
             $code .= "    if (!imp->document())\n";
             $code .= "        return;\n";
         }
     } else {
-        $code .= JSValueToNativeStatement($attribute->type, $attribute->extendedAttributes, "jsValue", "cppValue", "    ", "info.GetIsolate()");
+        my $asSetterValue = 0;
+        $code .= JSValueToNativeStatement($attribute->type, $attribute->extendedAttributes, $asSetterValue, "jsValue", "cppValue", "    ", "info.GetIsolate()");
     }
 
     if (IsEnumType($attrType)) {
         # setter ignores invalid enumeration values
         my @enumValues = ValidEnumValues($attrType);
         my @validEqualities = ();
         foreach my $enumValue (@enumValues) {
             push(@validEqualities, "string == \"$enumValue\"");
         }
         my $enumValidationExpression = join(" || ", @validEqualities);
@@ skipping 574 matching lines @@
             }
         } elsif ($nativeType =~ /^V8StringResource/) {
             my $default = defined $parameter->extendedAttributes->{"Default"} ? $parameter->extendedAttributes->{"Default"} : "";
             my $jsValue = $parameter->isOptional && $default eq "NullString" ? "argumentOrNull(args, $paramIndex)" : "args[$paramIndex]";
             my $stringResourceParameterName = $parameterName;
             my $isNullable = $parameter->isNullable && !IsRefPtrType($parameter->type);
             if ($isNullable) {
                 $parameterCheckString .= "    bool ${parameterName}IsNull = $jsValue->IsNull();\n";
                 $stringResourceParameterName .= "StringResource";
             }
-            $parameterCheckString .= JSValueToNativeStatement($parameter->type, $parameter->extendedAttributes, $jsValue, $stringResourceParameterName, "    ", "args.GetIsolate()");
+            $parameterCheckString .= JSValueToNativeStatement($parameter->type, $parameter->extendedAttributes, $humanFriendlyIndex, $jsValue, $stringResourceParameterName, "    ", "args.GetIsolate()");
             $parameterCheckString .= "    String $parameterName = $stringResourceParameterName;\n" if $isNullable;
             if (IsEnumType($parameter->type)) {
                 my @enumValues = ValidEnumValues($parameter->type);
                 my @validEqualities = ();
                 foreach my $enumValue (@enumValues) {
                     push(@validEqualities, "string == \"$enumValue\"");
                 }
                 my $enumValidationExpression = join(" || ", @validEqualities);
                 $parameterCheckString .=  "    String string = $parameterName;\n";
                 $parameterCheckString .= "    if (!($enumValidationExpression)) {\n";
@@ skipping 15 matching lines @@
                     $parameterCheckString .= "    if (args.Length() > $paramIndex && !isUndefinedOrNull($argValue) && !V8${argType}::HasInstance($argValue, args.GetIsolate(), worldType(args.GetIsolate()))) {\n";
                     $parameterCheckString .= "        throwTypeError(ExceptionMessages::failedToExecute(\"$functionName\", \"$interfaceName\", \"parameter $humanFriendlyIndex is not of type \'$argType\'.\"), args.GetIsolate());\n";
                     $parameterCheckString .= "        return;\n";
                     $parameterCheckString .= "    }\n";
                 }
             }
             my $default = defined $parameter->extendedAttributes->{"Default"} ? $parameter->extendedAttributes->{"Default"} : "";
             my $jsValue = $parameter->isOptional && $default eq "NullString" ? "argumentOrNull(args, $paramIndex)" : "args[$paramIndex]";
             my $isNullable = $parameter->isNullable && !IsRefPtrType($parameter->type);
             $parameterCheckString .= "    bool ${parameterName}IsNull = $jsValue->IsNull();\n" if $isNullable;
-            $parameterCheckString .= JSValueToNativeStatement($parameter->type, $parameter->extendedAttributes, $jsValue, $parameterName, "    ", "args.GetIsolate()");
+            $parameterCheckString .= JSValueToNativeStatement($parameter->type, $parameter->extendedAttributes, $humanFriendlyIndex, $jsValue, $parameterName, "    ", "args.GetIsolate()");
             if ($nativeType eq 'Dictionary' or $nativeType eq 'ScriptPromise') {
                 $parameterCheckString .= "    if (!$parameterName.isUndefinedOrNull() && !$parameterName.isObject()) {\n";
                 if ($functionName eq "Constructor") {
                     $parameterCheckString .= "        throwTypeError(ExceptionMessages::failedToConstruct(\"$interfaceName\", \"parameter ${humanFriendlyIndex} ('${parameterName}') is not an object.\"), args.GetIsolate());\n";
                 } else {
                     $parameterCheckString .= "        throwTypeError(ExceptionMessages::failedToExecute(\"$functionName\", \"$interfaceName\", \"parameter ${humanFriendlyIndex} ('${parameterName}') is not an object.\"), args.GetIsolate());\n";
                 }
                 $parameterCheckString .= "        return;\n";
                 $parameterCheckString .= "    }\n";
             }
@@ skipping 939 matching lines @@
     my $interface = shift;
     my $indexedSetterFunction = shift;
     my $implClassName = GetImplName($interface);
     my $v8ClassName = GetV8ClassName($interface);
     my $methodName = GetImplName($indexedSetterFunction);
 
     my $type = $indexedSetterFunction->parameters->[1]->type;
     my $raisesExceptions = $indexedSetterFunction->extendedAttributes->{"RaisesException"};
     my $treatNullAs = $indexedSetterFunction->parameters->[1]->extendedAttributes->{"TreatNullAs"};
     my $treatUndefinedAs = $indexedSetterFunction->parameters->[1]->extendedAttributes->{"TreatUndefinedAs"};
+    my $asSetterValue = 0;
+
     my $code = "static void indexedPropertySetter(uint32_t index, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<v8::Value>& info)\n";
     $code .= "{\n";
     $code .= "    ${implClassName}* collection = ${v8ClassName}::toNative(info.Holder());\n";
-    $code .= JSValueToNativeStatement($indexedSetterFunction->parameters->[1]->type, $indexedSetterFunction->extendedAttributes, "jsValue", "propertyValue", "    ", "info.GetIsolate()");
+    $code .= JSValueToNativeStatement($indexedSetterFunction->parameters->[1]->type, $indexedSetterFunction->extendedAttributes, $asSetterValue, "jsValue", "propertyValue", "    ", "info.GetIsolate()");
 
     my $extraArguments = "";
     if ($raisesExceptions) {
         $code .= "    ExceptionState es(info.GetIsolate());\n";
         $extraArguments = ", es";
     }
     my @conditions = ();
     my @statements = ();
     if ($treatNullAs && $treatNullAs ne "NullString") {
         push @conditions, "jsValue->IsNull()";
@@ skipping 278 matching lines @@
 {
     my $interface = shift;
     my $namedSetterFunction = shift;
     my $implClassName = GetImplName($interface);
     my $v8ClassName = GetV8ClassName($interface);
     my $methodName = GetImplName($namedSetterFunction);
 
     my $raisesExceptions = $namedSetterFunction->extendedAttributes->{"RaisesException"};
     my $treatNullAs = $namedSetterFunction->parameters->[1]->extendedAttributes->{"TreatNullAs"};
     my $treatUndefinedAs = $namedSetterFunction->parameters->[1]->extendedAttributes->{"TreatUndefinedAs"};
+    my $asSetterValue = 0;
 
     my $code = "static void namedPropertySetter(v8::Local<v8::String> name, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<v8::Value>& info)\n";
     $code .= "{\n";
     if (!$namedSetterFunction->extendedAttributes->{"OverrideBuiltins"}) {
         $code .= "    if (!info.Holder()->GetRealNamedPropertyInPrototypeChain(name).IsEmpty())\n";
         $code .= "        return;\n";
         $code .= "    if (info.Holder()->HasRealNamedCallbackProperty(name))\n";
         $code .= "        return;\n";
         $code .= "    if (info.Holder()->HasRealNamedProperty(name))\n";
         $code .= "        return;\n";
     }
     $code .= "    ${implClassName}* collection = ${v8ClassName}::toNative(info.Holder());\n";
-    $code .= JSValueToNativeStatement($namedSetterFunction->parameters->[0]->type, $namedSetterFunction->extendedAttributes, "name", "propertyName", "    ", "info.GetIsolate()");
-    $code .= JSValueToNativeStatement($namedSetterFunction->parameters->[1]->type, $namedSetterFunction->extendedAttributes, "jsValue", "propertyValue", "    ", "info.GetIsolate()");
+    $code .= JSValueToNativeStatement($namedSetterFunction->parameters->[0]->type, $namedSetterFunction->extendedAttributes, $asSetterValue, "name", "propertyName", "    ", "info.GetIsolate()");
+    $code .= JSValueToNativeStatement($namedSetterFunction->parameters->[1]->type, $namedSetterFunction->extendedAttributes, $asSetterValue, "jsValue", "propertyValue", "    ", "info.GetIsolate()");
     my $extraArguments = "";
     if ($raisesExceptions) {
         $code .= "    ExceptionState es(info.GetIsolate());\n";
         $extraArguments = ", es";
     }
 
     my @conditions = ();
     my @statements = ();
     if ($treatNullAs && $treatNullAs ne "NullString") {
         push @conditions, "jsValue->IsNull()";
@@ skipping 1411 matching lines @@
     # Callbacks use raw pointers, so pass isParameter = 1
     my $nativeType = GetNativeType($type, {}, "parameter");
     return "const $nativeType&" if $nativeType =~ /^Vector/;
     return $nativeType;
 }
 
 sub JSValueToNativeStatement
 {
     my $type = shift;
     my $extendedAttributes = shift;
+    my $argIndexOrZero = shift;
     my $jsValue = shift;
     my $variableName = shift;
     my $indent = shift;
     my $getIsolate = shift;
 
     my $nativeType = GetNativeType($type, $extendedAttributes, "parameter");
-    my $native_value = JSValueToNative($type, $extendedAttributes, $jsValue, $getIsolate);
+    my $native_value = JSValueToNative($type, $extendedAttributes, $argIndexOrZero, $jsValue, $getIsolate);
     my $code = "";
     if ($type eq "DOMString" || IsEnumType($type)) {
         die "Wrong native type passed: $nativeType" unless $nativeType =~ /^V8StringResource/;
         if ($type eq "DOMString" or IsEnumType($type)) {
             $code .= $indent . "V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID($nativeType, $variableName, $native_value);\n"
         } else {
             $code .= $indent . "$nativeType $variableName($native_value, true);\n";
         }
     } elsif ($extendedAttributes->{"EnforceRange"}) {
         $code .= $indent . "V8TRYCATCH_WITH_TYPECHECK_VOID($nativeType, $variableName, $native_value, $getIsolate);\n";
     } else {
         $code .= $indent . "V8TRYCATCH_VOID($nativeType, $variableName, $native_value);\n";
     }
     return $code;
 }
 
 
 sub JSValueToNative
 {
     my $type = shift;
     my $extendedAttributes = shift;
+    # Argument position (1-indexed) or 0 if for a setter's value.
+    my $argIndexOrZero = shift;
     my $value = shift;
     my $getIsolate = shift;
 
     my $intConversion = $extendedAttributes->{"EnforceRange"} ? "EnforceRange" : "NormalConversion";
 
     return "$value->BooleanValue()" if $type eq "boolean";
     return "static_cast<$type>($value->NumberValue())" if $type eq "float" or $type eq "double";
 
     if ($intConversion ne "NormalConversion") {
         return "toInt8($value, $intConversion, ok)" if $type eq "byte";
@@ skipping 58 matching lines @@
 
     if ($type eq "XPathNSResolver") {
         return "toXPathNSResolver($value, $getIsolate)";
     }
 
     my $arrayOrSequenceType = GetArrayOrSequenceType($type);
 
     if ($arrayOrSequenceType) {
         if (IsRefPtrType($arrayOrSequenceType)) {
             AddToImplIncludes("V8${arrayOrSequenceType}.h");
-            return "(toRefPtrNativeArray<${arrayOrSequenceType}, V8${arrayOrSequenceType}>($value, $getIsolate))";
+            return "(toRefPtrNativeArray<${arrayOrSequenceType}, V8${arrayOrSequenceType}>($value, $argIndexOrZero, $getIsolate))";
         }
-        return "toNativeArray<" . GetNativeType($arrayOrSequenceType) . ">($value, $getIsolate)";
+        return "toNativeArray<" . GetNativeType($arrayOrSequenceType) . ">($value, $argIndexOrZero, $getIsolate)";
     }
 
     AddIncludesForType($type);
 
     AddToImplIncludes("V8${type}.h");
     return "V8${type}::HasInstance($value, $getIsolate, worldType($getIsolate)) ? V8${type}::toNative(v8::Handle<v8::Object>::Cast($value)) : 0";
 }
 
 sub CreateCustomSignature
 {
@@ skipping 828 matching lines @@
     my $interface = shift;
 
     return 1 if $interface->extendedAttributes->{"CustomToV8"};
     return 1 if $interface->extendedAttributes->{"SpecialWrapFor"};
     return 1 if InheritsInterface($interface, "Document");
 
     return 0;
 }
 
 1;