Implement line and column numbers.

pkg/front_end/lib/src/fasta/source/outline_builder.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library fasta.outline_builder;
 
 import 'package:kernel/ast.dart' show
     AsyncMarker,
     ProcedureKind;
 
@@ skipping 123 matching lines @@
 
   @override
   void endExport(Token exportKeyword, Token semicolon) {
     debugEvent("Export");
     List<Combinator> combinators = pop();
     Unhandled conditionalUris = pop();
     String uri = pop();
     List<MetadataBuilder> metadata = pop();
     library.addExport(
         metadata, uri, conditionalUris, combinators, exportKeyword.charOffset);
-    checkEmpty();
+    checkEmpty(exportKeyword.charOffset);
   }
 
   @override
   void endImport(Token importKeyword, Token deferredKeyword, Token asKeyword,
       Token semicolon) {
     debugEvent("endImport");
     List<Combinator> combinators = pop();
     String prefix = popIfNotNull(asKeyword);
     Unhandled conditionalUris = pop();
     String uri = pop();
     List<MetadataBuilder> metadata = pop();
     library.addImport(metadata, uri, conditionalUris, prefix, combinators,
         deferredKeyword != null, importKeyword.charOffset,
         asKeyword?.next?.charOffset ?? -1);
-    checkEmpty();
+    checkEmpty(importKeyword.charOffset);
   }
 
   @override
   void endPart(Token partKeyword, Token semicolon) {
     debugEvent("Part");
     String uri = pop();
     List<MetadataBuilder> metadata = pop();
     library.addPart(metadata, uri);
-    checkEmpty();
+    checkEmpty(partKeyword.charOffset);
   }
 
   @override
   void handleOperatorName(Token operatorKeyword, Token token) {
     debugEvent("OperatorName");
     push(operatorFromString(token.stringValue));
   }
 
   @override
   void endIdentifierList(int count) {
@@ skipping 32 matching lines @@
     List<TypeVariableBuilder> typeVariables = pop();
     String name = pop();
     if (typeVariables != null && supertype is MixinApplicationBuilder) {
       supertype.typeVariables = typeVariables;
       supertype.subclassName = name;
     }
     int modifiers = Modifier.validate(pop());
     List<MetadataBuilder> metadata = pop();
     library.addClass(metadata, modifiers, name, typeVariables, supertype,
         interfaces, beginToken.charOffset);
-    checkEmpty();
+    checkEmpty(beginToken.charOffset);
   }
 
   ProcedureKind computeProcedureKind(Token token) {
     if (token == null) return ProcedureKind.Method;
     if (optional("get", token)) return ProcedureKind.Getter;
     if (optional("set", token)) return ProcedureKind.Setter;
     return internalError("Unhandled: ${token.value}");
   }
 
   @override
   void beginTopLevelMethod(Token token, Token name) {
     library.beginNestedDeclaration(name.value, hasMembers: false);
   }
 
   @override
   void endTopLevelMethod(
       Token beginToken, Token getOrSet, Token endToken) {
     debugEvent("endTopLevelMethod");
     MethodBody kind = pop();
     AsyncMarker asyncModifier = pop();
     List<FormalParameterBuilder> formals = pop();
     List<TypeVariableBuilder> typeVariables = pop();
     String name = pop();
     TypeBuilder returnType = pop();
     int modifiers = Modifier.validate(pop(),
         isAbstract: kind == MethodBody.Abstract);
     List<MetadataBuilder> metadata = pop();
-    checkEmpty();
+    checkEmpty(beginToken.charOffset);
     library.addProcedure(metadata, modifiers, returnType, name,
         typeVariables, formals, asyncModifier, computeProcedureKind(getOrSet),
         beginToken.charOffset, nativeMethodName, isTopLevel: true);
     nativeMethodName = null;
   }
 
   @override
   void handleNoFunctionBody(Token token) {
     debugEvent("NoFunctionBody");
     push(MethodBody.Abstract);
@@ skipping 67 matching lines @@
     String name = pop();
     if (typeVariables != null && mixinApplication is MixinApplicationBuilder) {
       mixinApplication.typeVariables = typeVariables;
       mixinApplication.subclassName = name;
     }
     int modifiers = Modifier.validate(pop());
     List<MetadataBuilder> metadata = pop();
     library.addNamedMixinApplication(
         metadata, name, typeVariables, modifiers, mixinApplication, interfaces,
         classKeyword.charOffset);
-    checkEmpty();
+    checkEmpty(classKeyword.charOffset);
   }
 
   @override
   void endTypeArguments(int count, Token beginToken, Token endToken) {
     debugEvent("TypeArguments");
     push(popList(count) ?? NullValue.TypeArguments);
   }
 
   @override
   void endType(Token beginToken, Token endToken) {
@@ skipping 93 matching lines @@
     }
     push(formals ?? NullValue.FormalParameters);
   }
 
   @override
   void endEnum(Token enumKeyword, Token endBrace, int count) {
     List<String> constants = popList(count);
     String name = pop();
     List<MetadataBuilder> metadata = pop();
     library.addEnum(metadata, name, constants, enumKeyword.charOffset);
-    checkEmpty();
+    checkEmpty(enumKeyword.charOffset);
   }
 
   @override
   void beginFunctionTypeAlias(Token token) {
     library.beginNestedDeclaration(null, hasMembers: false);
   }
 
   @override
   void endFunctionTypeAlias(Token typedefKeyword, Token endToken) {
     debugEvent("endFunctionTypeAlias");
     List<FormalParameterBuilder> formals = pop();
     List<TypeVariableBuilder> typeVariables = pop();
     String name = pop();
     TypeBuilder returnType = pop();
     List<MetadataBuilder> metadata = pop();
     library.addFunctionTypeAlias(
         metadata, returnType, name, typeVariables, formals,
         typedefKeyword.charOffset);
-    checkEmpty();
+    checkEmpty(typedefKeyword.charOffset);
   }
 
   @override
   void endTopLevelFields(int count, Token beginToken, Token endToken) {
     debugEvent("endTopLevelFields");
     List<String> names = popList(count);
     TypeBuilder type = pop();
     int modifiers = Modifier.validate(pop());
     List<MetadataBuilder> metadata = pop();
     library.addFields(metadata, modifiers, type, names);
-    checkEmpty();
+    checkEmpty(beginToken.charOffset);
   }
 
   @override
   void endFields(int count, Token beginToken, Token endToken) {
     debugEvent("Fields");
     List<String> names = popList(count);
     TypeBuilder type = pop();
     int modifiers = Modifier.validate(pop());
     List<MetadataBuilder> metadata = pop();
     library.addFields(metadata, modifiers, type, names);
@@ skipping 122 matching lines @@
   Link<Token> handleMemberName(Link<Token> identifiers) {
     if (!isDartLibrary || identifiers.isEmpty) return identifiers;
     return removeNativeClause(identifiers);
   }
 
   @override
   void debugEvent(String name) {
     // printEvent(name);
   }
 }