1216630 - Rename preludeStart and postludeEnd to toStringStart and toStringEnd and misc fixes.

5 files changed, 68 insertions, 62 deletions

diff --git a/js/src/frontend/BytecodeCompiler.cpp b/js/src/frontend/BytecodeCompiler.cpp
index e0bb64e05..a1abbfeda 100644
--- a/js/src/frontend/BytecodeCompiler.cpp
+++ b/js/src/frontend/BytecodeCompiler.cpp
@@ -248,11 +248,17 @@ BytecodeCompiler::createSourceAndParser(Maybe<uint32_t> parameterListEnd /* = No
 }
 
 bool
-BytecodeCompiler::createScript(uint32_t preludeStart /* = 0 */, uint32_t postludeEnd /* = 0 */)
+BytecodeCompiler::createScript()
+{
+    return createScript(0, sourceBuffer.length());
+}
+
+bool
+BytecodeCompiler::createScript(uint32_t toStringStart, uint32_t toStringEnd)
 {
     script = JSScript::Create(cx, options,
                               sourceObject, /* sourceStart = */ 0, sourceBuffer.length(),
-                              preludeStart, postludeEnd);
+                              toStringStart, toStringEnd);
     return script != nullptr;
 }
 
@@ -464,7 +470,7 @@ BytecodeCompiler::compileStandaloneFunction(MutableHandleFunction fun,
     if (fn->pn_funbox->function()->isInterpreted()) {
         MOZ_ASSERT(fun == fn->pn_funbox->function());
 
-        if (!createScript(fn->pn_funbox->preludeStart, fn->pn_funbox->postludeEnd))
+        if (!createScript(fn->pn_funbox->toStringStart, fn->pn_funbox->toStringEnd))
             return false;
 
         Maybe<BytecodeEmitter> emitter;
@@ -659,7 +665,7 @@ frontend::CompileLazyFunction(JSContext* cx, Handle<LazyScript*> lazy, const cha
 
     Rooted<JSScript*> script(cx, JSScript::Create(cx, options, sourceObject,
                                                   lazy->begin(), lazy->end(),
-                                                  lazy->preludeStart(), lazy->postludeEnd()));
+                                                  lazy->toStringStart(), lazy->toStringEnd()));
     if (!script)
         return false;
 
diff --git a/js/src/frontend/BytecodeEmitter.cpp b/js/src/frontend/BytecodeEmitter.cpp
index c788e0086..7582e8df1 100644
--- a/js/src/frontend/BytecodeEmitter.cpp
+++ b/js/src/frontend/BytecodeEmitter.cpp
@@ -7846,8 +7846,8 @@ BytecodeEmitter::emitFunction(ParseNode* pn, bool needsProto)
             Rooted<JSObject*> sourceObject(cx, script->sourceObject());
             Rooted<JSScript*> script(cx, JSScript::Create(cx, options, sourceObject,
                                                           funbox->bufStart, funbox->bufEnd,
-                                                          funbox->preludeStart,
-                                                          funbox->postludeEnd));
+                                                          funbox->toStringStart,
+                                                          funbox->toStringEnd));
             if (!script)
                 return false;
 
diff --git a/js/src/frontend/Parser.cpp b/js/src/frontend/Parser.cpp
index 299b8b93a..1be57f8f5 100644
--- a/js/src/frontend/Parser.cpp
+++ b/js/src/frontend/Parser.cpp
@@ -458,7 +458,7 @@ UsedNameTracker::rewind(RewindToken token)
 }
 
 FunctionBox::FunctionBox(ExclusiveContext* cx, LifoAlloc& alloc, ObjectBox* traceListHead,
-                         JSFunction* fun, uint32_t preludeStart,
+                         JSFunction* fun, uint32_t toStringStart,
                          Directives directives, bool extraWarnings,
                          GeneratorKind generatorKind, FunctionAsyncKind asyncKind)
   : ObjectBox(fun, traceListHead),
@@ -472,8 +472,8 @@ FunctionBox::FunctionBox(ExclusiveContext* cx, LifoAlloc& alloc, ObjectBox* trac
     bufEnd(0),
     startLine(1),
     startColumn(0),
-    preludeStart(preludeStart),
-    postludeEnd(0),
+    toStringStart(toStringStart),
+    toStringEnd(0),
     length(0),
     generatorKindBits_(GeneratorKindAsBits(generatorKind)),
     asyncKindBits_(AsyncKindAsBits(asyncKind)),
@@ -888,7 +888,7 @@ Parser<ParseHandler>::newObjectBox(JSObject* obj)
 
 template <typename ParseHandler>
 FunctionBox*
-Parser<ParseHandler>::newFunctionBox(Node fn, JSFunction* fun, uint32_t preludeStart,
+Parser<ParseHandler>::newFunctionBox(Node fn, JSFunction* fun, uint32_t toStringStart,
                                      Directives inheritedDirectives,
                                      GeneratorKind generatorKind, FunctionAsyncKind asyncKind,
                                      bool tryAnnexB)
@@ -904,7 +904,7 @@ Parser<ParseHandler>::newFunctionBox(Node fn, JSFunction* fun, uint32_t preludeS
      * function.
      */
     FunctionBox* funbox =
-        alloc.new_<FunctionBox>(context, alloc, traceListHead, fun, preludeStart,
+        alloc.new_<FunctionBox>(context, alloc, traceListHead, fun, toStringStart,
                                 inheritedDirectives, options().extraWarningsOption,
                                 generatorKind, asyncKind);
     if (!funbox) {
@@ -2404,7 +2404,7 @@ Parser<SyntaxParseHandler>::finishFunction(bool isStandaloneFunction /* = false
     LazyScript* lazy = LazyScript::Create(context, fun, pc->closedOverBindingsForLazy(),
                                           pc->innerFunctionsForLazy, versionNumber(),
                                           funbox->bufStart, funbox->bufEnd,
-                                          funbox->preludeStart,
+                                          funbox->toStringStart,
                                           funbox->startLine, funbox->startColumn);
     if (!lazy)
         return false;
@@ -2495,7 +2495,7 @@ Parser<FullParseHandler>::standaloneFunction(HandleFunction fun,
         return null();
     fn->pn_body = argsbody;
 
-    FunctionBox* funbox = newFunctionBox(fn, fun, /* preludeStart = */ 0, inheritedDirectives,
+    FunctionBox* funbox = newFunctionBox(fn, fun, /* toStringStart = */ 0, inheritedDirectives,
                                          generatorKind, asyncKind, /* tryAnnexB = */ false);
     if (!funbox)
         return null();
@@ -3158,7 +3158,7 @@ Parser<ParseHandler>::functionArguments(YieldHandling yieldHandling, FunctionSyn
 
 template <>
 bool
-Parser<FullParseHandler>::skipLazyInnerFunction(ParseNode* pn, uint32_t preludeStart,
+Parser<FullParseHandler>::skipLazyInnerFunction(ParseNode* pn, uint32_t toStringStart,
                                                 FunctionSyntaxKind kind, bool tryAnnexB)
 {
     // When a lazily-parsed function is called, we only fully parse (and emit)
@@ -3168,7 +3168,7 @@ Parser<FullParseHandler>::skipLazyInnerFunction(ParseNode* pn, uint32_t preludeS
 
     RootedFunction fun(context, handler.nextLazyInnerFunction());
     MOZ_ASSERT(!fun->isLegacyGenerator());
-    FunctionBox* funbox = newFunctionBox(pn, fun, preludeStart, Directives(/* strict = */ false),
+    FunctionBox* funbox = newFunctionBox(pn, fun, toStringStart, Directives(/* strict = */ false),
                                          fun->generatorKind(), fun->asyncKind(), tryAnnexB);
     if (!funbox)
         return false;
@@ -3205,7 +3205,7 @@ Parser<FullParseHandler>::skipLazyInnerFunction(ParseNode* pn, uint32_t preludeS
 
 template <>
 bool
-Parser<SyntaxParseHandler>::skipLazyInnerFunction(Node pn, uint32_t preludeStart,
+Parser<SyntaxParseHandler>::skipLazyInnerFunction(Node pn, uint32_t toStringStart,
                                                   FunctionSyntaxKind kind, bool tryAnnexB)
 {
     MOZ_CRASH("Cannot skip lazy inner functions when syntax parsing");
@@ -3282,7 +3282,7 @@ Parser<ParseHandler>::templateLiteral(YieldHandling yieldHandling)
 
 template <typename ParseHandler>
 typename ParseHandler::Node
-Parser<ParseHandler>::functionDefinition(uint32_t preludeStart, Node pn, InHandling inHandling,
+Parser<ParseHandler>::functionDefinition(uint32_t toStringStart, Node pn, InHandling inHandling,
                                          YieldHandling yieldHandling,
                                          HandleAtom funName, FunctionSyntaxKind kind,
                                          GeneratorKind generatorKind, FunctionAsyncKind asyncKind,
@@ -3295,7 +3295,7 @@ Parser<ParseHandler>::functionDefinition(uint32_t preludeStart, Node pn, InHandl
     // functions, which are also lazy. Instead, their free variables and
     // source extents are recorded and may be skipped.
     if (handler.canSkipLazyInnerFunctions()) {
-        if (!skipLazyInnerFunction(pn, preludeStart, kind, tryAnnexB))
+        if (!skipLazyInnerFunction(pn, toStringStart, kind, tryAnnexB))
             return null();
         return pn;
     }
@@ -3328,7 +3328,7 @@ Parser<ParseHandler>::functionDefinition(uint32_t preludeStart, Node pn, InHandl
     // reparse a function due to failed syntax parsing and encountering new
     // "use foo" directives.
     while (true) {
-        if (trySyntaxParseInnerFunction(pn, fun, preludeStart, inHandling, yieldHandling, kind,
+        if (trySyntaxParseInnerFunction(pn, fun, toStringStart, inHandling, yieldHandling, kind,
                                         generatorKind, asyncKind, tryAnnexB, directives,
                                         &newDirectives))
         {
@@ -3357,7 +3357,7 @@ Parser<ParseHandler>::functionDefinition(uint32_t preludeStart, Node pn, InHandl
 template <>
 bool
 Parser<FullParseHandler>::trySyntaxParseInnerFunction(ParseNode* pn, HandleFunction fun,
-                                                      uint32_t preludeStart,
+                                                      uint32_t toStringStart,
                                                       InHandling inHandling,
                                                       YieldHandling yieldHandling,
                                                       FunctionSyntaxKind kind,
@@ -3391,13 +3391,13 @@ Parser<FullParseHandler>::trySyntaxParseInnerFunction(ParseNode* pn, HandleFunct
         // Make a FunctionBox before we enter the syntax parser, because |pn|
         // still expects a FunctionBox to be attached to it during BCE, and
         // the syntax parser cannot attach one to it.
-        FunctionBox* funbox = newFunctionBox(pn, fun, preludeStart, inheritedDirectives,
+        FunctionBox* funbox = newFunctionBox(pn, fun, toStringStart, inheritedDirectives,
                                              generatorKind, asyncKind, tryAnnexB);
         if (!funbox)
             return false;
         funbox->initWithEnclosingParseContext(pc, kind);
 
-        if (!parser->innerFunction(SyntaxParseHandler::NodeGeneric, pc, funbox, preludeStart,
+        if (!parser->innerFunction(SyntaxParseHandler::NodeGeneric, pc, funbox, toStringStart,
                                    inHandling, yieldHandling, kind,
                                    inheritedDirectives, newDirectives))
         {
@@ -3426,14 +3426,14 @@ Parser<FullParseHandler>::trySyntaxParseInnerFunction(ParseNode* pn, HandleFunct
     } while (false);
 
     // We failed to do a syntax parse above, so do the full parse.
-    return innerFunction(pn, pc, fun, preludeStart, inHandling, yieldHandling, kind,
+    return innerFunction(pn, pc, fun, toStringStart, inHandling, yieldHandling, kind,
                          generatorKind, asyncKind, tryAnnexB, inheritedDirectives, newDirectives);
 }
 
 template <>
 bool
 Parser<SyntaxParseHandler>::trySyntaxParseInnerFunction(Node pn, HandleFunction fun,
-                                                        uint32_t preludeStart,
+                                                        uint32_t toStringStart,
                                                         InHandling inHandling,
                                                         YieldHandling yieldHandling,
                                                         FunctionSyntaxKind kind,
@@ -3444,14 +3444,14 @@ Parser<SyntaxParseHandler>::trySyntaxParseInnerFunction(Node pn, HandleFunction
                                                         Directives* newDirectives)
 {
     // This is already a syntax parser, so just parse the inner function.
-    return innerFunction(pn, pc, fun, preludeStart, inHandling, yieldHandling, kind,
+    return innerFunction(pn, pc, fun, toStringStart, inHandling, yieldHandling, kind,
                           generatorKind, asyncKind, tryAnnexB, inheritedDirectives, newDirectives);
 }
 
 template <typename ParseHandler>
 bool
 Parser<ParseHandler>::innerFunction(Node pn, ParseContext* outerpc, FunctionBox* funbox,
-                                    uint32_t preludeStart,
+                                    uint32_t toStringStart,
                                     InHandling inHandling, YieldHandling yieldHandling,
                                     FunctionSyntaxKind kind, Directives inheritedDirectives,
                                     Directives* newDirectives)
@@ -3475,7 +3475,7 @@ Parser<ParseHandler>::innerFunction(Node pn, ParseContext* outerpc, FunctionBox*
 template <typename ParseHandler>
 bool
 Parser<ParseHandler>::innerFunction(Node pn, ParseContext* outerpc, HandleFunction fun,
-                                    uint32_t preludeStart,
+                                    uint32_t toStringStart,
                                     InHandling inHandling, YieldHandling yieldHandling,
                                     FunctionSyntaxKind kind,
                                     GeneratorKind generatorKind, FunctionAsyncKind asyncKind,
@@ -3487,13 +3487,13 @@ Parser<ParseHandler>::innerFunction(Node pn, ParseContext* outerpc, HandleFuncti
     // parser. In that case, outerpc is a ParseContext from the full parser
     // instead of the current top of the stack of the syntax parser.
 
-    FunctionBox* funbox = newFunctionBox(pn, fun, preludeStart, inheritedDirectives,
+    FunctionBox* funbox = newFunctionBox(pn, fun, toStringStart, inheritedDirectives,
                                          generatorKind, asyncKind, tryAnnexB);
     if (!funbox)
         return false;
     funbox->initWithEnclosingParseContext(outerpc, kind);
 
-    return innerFunction(pn, outerpc, funbox, preludeStart, inHandling, yieldHandling, kind,
+    return innerFunction(pn, outerpc, funbox, toStringStart, inHandling, yieldHandling, kind,
                          inheritedDirectives, newDirectives);
 }
 
@@ -3529,7 +3529,7 @@ Parser<FullParseHandler>::standaloneLazyFunction(HandleFunction fun, bool strict
         return null();
 
     Directives directives(strict);
-    FunctionBox* funbox = newFunctionBox(pn, fun, /* preludeStart = */ 0, directives,
+    FunctionBox* funbox = newFunctionBox(pn, fun, /* toStringStart = */ 0, directives,
                                          generatorKind, asyncKind, /* tryAnnexB = */ false);
     if (!funbox)
         return null();
@@ -3716,7 +3716,7 @@ Parser<ParseHandler>::functionFormalParametersAndBody(InHandling inHandling,
 
 template <typename ParseHandler>
 typename ParseHandler::Node
-Parser<ParseHandler>::functionStmt(uint32_t preludeStart, YieldHandling yieldHandling,
+Parser<ParseHandler>::functionStmt(uint32_t toStringStart, YieldHandling yieldHandling,
                                    DefaultHandling defaultHandling, FunctionAsyncKind asyncKind)
 {
     MOZ_ASSERT(tokenStream.isCurrentTokenType(TOK_FUNCTION));
@@ -3800,13 +3800,13 @@ Parser<ParseHandler>::functionStmt(uint32_t preludeStart, YieldHandling yieldHan
         return null();
 
     YieldHandling newYieldHandling = GetYieldHandling(generatorKind, asyncKind);
-    return functionDefinition(preludeStart, pn, InAllowed, newYieldHandling,
+    return functionDefinition(toStringStart, pn, InAllowed, newYieldHandling,
                                   name, Statement, generatorKind, asyncKind, tryAnnexB);
 }
 
 template <typename ParseHandler>
 typename ParseHandler::Node
-Parser<ParseHandler>::functionExpr(uint32_t preludeStart, InvokedPrediction invoked,
+Parser<ParseHandler>::functionExpr(uint32_t toStringStart, InvokedPrediction invoked,
                                    FunctionAsyncKind asyncKind)
 {
     MOZ_ASSERT(tokenStream.isCurrentTokenType(TOK_FUNCTION));
@@ -3845,7 +3845,7 @@ Parser<ParseHandler>::functionExpr(uint32_t preludeStart, InvokedPrediction invo
     if (invoked)
         pn = handler.setLikelyIIFE(pn);
 
-    return functionDefinition(preludeStart, pn, InAllowed, yieldHandling, name, Expression,
+    return functionDefinition(toStringStart, pn, InAllowed, yieldHandling, name, Expression,
                               generatorKind, asyncKind);
 }
 
@@ -7122,13 +7122,13 @@ Parser<ParseHandler>::classDefinition(YieldHandling yieldHandling,
             return null();
     }
 
-    // Amend the postlude offset for the constructor now that we've finished
-    // parsing the class.
+    // Amend the toStringEnd offset for the constructor now that we've
+    // finished parsing the class.
     uint32_t classEndOffset = pos().end;
     if (FunctionBox* ctorbox = classStmt.constructorBox()) {
         if (ctorbox->function()->isInterpretedLazy())
-            ctorbox->function()->lazyScript()->setPostludeEnd(classEndOffset);
-        ctorbox->postludeEnd = classEndOffset;
+            ctorbox->function()->lazyScript()->setToStringEnd(classEndOffset);
+        ctorbox->toStringEnd = classEndOffset;
     }
 
     Node nameNode = null();
@@ -7507,9 +7507,9 @@ Parser<ParseHandler>::statementListItem(YieldHandling yieldHandling,
             if (!tokenStream.peekTokenSameLine(&nextSameLine))
                 return null();
             if (nextSameLine == TOK_FUNCTION) {
-                uint32_t preludeStart = pos().begin;
+                uint32_t toStringStart = pos().begin;
                 tokenStream.consumeKnownToken(TOK_FUNCTION);
-                return functionStmt(preludeStart, yieldHandling, NameRequired, AsyncFunction);
+                return functionStmt(toStringStart, yieldHandling, NameRequired, AsyncFunction);
             }
         }
 
@@ -8053,7 +8053,7 @@ Parser<ParseHandler>::assignExpr(InHandling inHandling, YieldHandling yieldHandl
 
         if (!tokenStream.getToken(&next, TokenStream::Operand))
             return null();
-        uint32_t preludeStart = pos().begin;
+        uint32_t toStringStart = pos().begin;
         tokenStream.ungetToken();
 
         GeneratorKind generatorKind = NotGenerator;
@@ -8078,7 +8078,7 @@ Parser<ParseHandler>::assignExpr(InHandling inHandling, YieldHandling yieldHandl
         if (!pn)
             return null();
 
-        Node arrowFunc = functionDefinition(preludeStart, pn, inHandling, yieldHandling, nullptr,
+        Node arrowFunc = functionDefinition(toStringStart, pn, inHandling, yieldHandling, nullptr,
                                             Arrow, generatorKind, asyncKind);
         if (!arrowFunc)
             return null();
@@ -8391,7 +8391,7 @@ Parser<ParseHandler>::generatorComprehensionLambda(unsigned begin)
 
     // Create box for fun->object early to root it.
     Directives directives(/* strict = */ outerpc->sc()->strict());
-    FunctionBox* genFunbox = newFunctionBox(genfn, fun, /* preludeStart = */ 0, directives,
+    FunctionBox* genFunbox = newFunctionBox(genfn, fun, /* toStringStart = */ 0, directives,
                                             StarGenerator, SyncFunction, /* tryAnnexB = */ false);
     if (!genFunbox)
         return null();
@@ -9662,7 +9662,7 @@ Parser<ParseHandler>::objectLiteral(YieldHandling yieldHandling, PossibleError*
 
 template <typename ParseHandler>
 typename ParseHandler::Node
-Parser<ParseHandler>::methodDefinition(uint32_t preludeStart, PropertyType propType,
+Parser<ParseHandler>::methodDefinition(uint32_t toStringStart, PropertyType propType,
                                        HandleAtom funName)
 {
     FunctionSyntaxKind kind;
@@ -9716,7 +9716,7 @@ Parser<ParseHandler>::methodDefinition(uint32_t preludeStart, PropertyType propT
     if (!pn)
         return null();
 
-    return functionDefinition(preludeStart, pn, InAllowed, yieldHandling, funName,
+    return functionDefinition(toStringStart, pn, InAllowed, yieldHandling, funName,
                               kind, generatorKind, asyncKind);
 }
 
@@ -9845,9 +9845,9 @@ Parser<ParseHandler>::primaryExpr(YieldHandling yieldHandling, TripledotHandling
                 return null();
 
             if (nextSameLine == TOK_FUNCTION) {
-                uint32_t preludeStart = pos().begin;
+                uint32_t toStringStart = pos().begin;
                 tokenStream.consumeKnownToken(TOK_FUNCTION);
-                return functionExpr(preludeStart, PredictUninvoked, AsyncFunction);
+                return functionExpr(toStringStart, PredictUninvoked, AsyncFunction);
             }
         }
 
diff --git a/js/src/frontend/Parser.h b/js/src/frontend/Parser.h
index efb543efa..65e46a65e 100644
--- a/js/src/frontend/Parser.h
+++ b/js/src/frontend/Parser.h
@@ -1081,7 +1081,7 @@ class Parser final : public ParserBase, private JS::AutoGCRooter
      * cx->tempLifoAlloc.
      */
     ObjectBox* newObjectBox(JSObject* obj);
-    FunctionBox* newFunctionBox(Node fn, JSFunction* fun, uint32_t preludeStart,
+    FunctionBox* newFunctionBox(Node fn, JSFunction* fun, uint32_t toStringStart,
                                 Directives directives,
                                 GeneratorKind generatorKind, FunctionAsyncKind asyncKind,
                                 bool tryAnnexB);
@@ -1152,7 +1152,7 @@ class Parser final : public ParserBase, private JS::AutoGCRooter
 
     // Parse an inner function given an enclosing ParseContext and a
     // FunctionBox for the inner function.
-    bool innerFunction(Node pn, ParseContext* outerpc, FunctionBox* funbox, uint32_t preludeStart,
+    bool innerFunction(Node pn, ParseContext* outerpc, FunctionBox* funbox, uint32_t toStringStart,
                        InHandling inHandling, YieldHandling yieldHandling,
                        FunctionSyntaxKind kind,
                        Directives inheritedDirectives, Directives* newDirectives);
@@ -1186,10 +1186,10 @@ class Parser final : public ParserBase, private JS::AutoGCRooter
      * Some parsers have two versions:  an always-inlined version (with an 'i'
      * suffix) and a never-inlined version (with an 'n' suffix).
      */
-    Node functionStmt(uint32_t preludeStart,
+    Node functionStmt(uint32_t toStringStart,
                       YieldHandling yieldHandling, DefaultHandling defaultHandling,
                       FunctionAsyncKind asyncKind = SyncFunction);
-    Node functionExpr(uint32_t preludeStart, InvokedPrediction invoked = PredictUninvoked,
+    Node functionExpr(uint32_t toStringStart, InvokedPrediction invoked = PredictUninvoked,
                       FunctionAsyncKind asyncKind = SyncFunction);
 
     Node statementList(YieldHandling yieldHandling);
@@ -1338,7 +1338,7 @@ class Parser final : public ParserBase, private JS::AutoGCRooter
     bool tryNewTarget(Node& newTarget);
     bool checkAndMarkSuperScope();
 
-    Node methodDefinition(uint32_t preludeStart, PropertyType propType, HandleAtom funName);
+    Node methodDefinition(uint32_t toStringStart, PropertyType propType, HandleAtom funName);
 
     /*
      * Additional JS parsers.
@@ -1346,7 +1346,7 @@ class Parser final : public ParserBase, private JS::AutoGCRooter
     bool functionArguments(YieldHandling yieldHandling, FunctionSyntaxKind kind,
                            Node funcpn);
 
-    Node functionDefinition(uint32_t preludeStart, Node pn,
+    Node functionDefinition(uint32_t toStringStart, Node pn,
                             InHandling inHandling, YieldHandling yieldHandling, HandleAtom name,
                             FunctionSyntaxKind kind,
                             GeneratorKind generatorKind, FunctionAsyncKind asyncKind,
@@ -1438,14 +1438,14 @@ class Parser final : public ParserBase, private JS::AutoGCRooter
     Node newDotGeneratorName();
     bool declareDotGeneratorName();
 
-    bool skipLazyInnerFunction(Node pn, uint32_t preludeStart, FunctionSyntaxKind kind,
+    bool skipLazyInnerFunction(Node pn, uint32_t toStringStart, FunctionSyntaxKind kind,
                                bool tryAnnexB);
-    bool innerFunction(Node pn, ParseContext* outerpc, HandleFunction fun, uint32_t preludeStart,
+    bool innerFunction(Node pn, ParseContext* outerpc, HandleFunction fun, uint32_t toStringStart,
                        InHandling inHandling, YieldHandling yieldHandling,
                        FunctionSyntaxKind kind,
                        GeneratorKind generatorKind, FunctionAsyncKind asyncKind, bool tryAnnexB,
                        Directives inheritedDirectives, Directives* newDirectives);
-    bool trySyntaxParseInnerFunction(Node pn, HandleFunction fun, uint32_t preludeStart,
+    bool trySyntaxParseInnerFunction(Node pn, HandleFunction fun, uint32_t toStringStart,
                                      InHandling inHandling, YieldHandling yieldHandling,
                                      FunctionSyntaxKind kind,
                                      GeneratorKind generatorKind, FunctionAsyncKind asyncKind,
diff --git a/js/src/frontend/SharedContext.h b/js/src/frontend/SharedContext.h
index 213a0a461..3499a53fb 100644
--- a/js/src/frontend/SharedContext.h
+++ b/js/src/frontend/SharedContext.h
@@ -451,8 +451,8 @@ class FunctionBox : public ObjectBox, public SharedContext
     uint32_t        bufEnd;
     uint32_t        startLine;
     uint32_t        startColumn;
-    uint32_t        preludeStart;
-    uint32_t        postludeEnd;
+    uint32_t        toStringStart;
+    uint32_t        toStringEnd;
     uint16_t        length;
 
     uint8_t         generatorKindBits_;     /* The GeneratorKind of this function. */
@@ -482,7 +482,7 @@ class FunctionBox : public ObjectBox, public SharedContext
     FunctionContextFlags funCxFlags;
 
     FunctionBox(ExclusiveContext* cx, LifoAlloc& alloc, ObjectBox* traceListHead, JSFunction* fun,
-                uint32_t preludeStart, Directives directives, bool extraWarnings,
+                uint32_t toStringStart, Directives directives, bool extraWarnings,
                 GeneratorKind generatorKind, FunctionAsyncKind asyncKind);
 
     MutableHandle<LexicalScope::Data*> namedLambdaBindings() {
@@ -608,10 +608,10 @@ class FunctionBox : public ObjectBox, public SharedContext
 
     void setEnd(uint32_t end) {
         // For all functions except class constructors, the buffer and
-        // postlude ending positions are the same. Class constructors override
-        // the postlude ending position with the end of the class definition.
+        // toString ending positions are the same. Class constructors override
+        // the toString ending position with the end of the class definition.
         bufEnd = end;
-        postludeEnd = end;
+        toStringEnd = end;
     }
 
     void trace(JSTracer* trc) override;