Generate methods for reporting problems.

pkg/front_end/lib/src/fasta/problems.dart

Index: pkg/front_end/lib/src/fasta/problems.dart
diff --git a/pkg/front_end/lib/src/fasta/problems.dart b/pkg/front_end/lib/src/fasta/problems.dart
new file mode 100644
index 0000000000000000000000000000000000000000..2fdba55ad4ea7f13e051f55f855ea9892bb659fd
--- /dev/null
+++ b/pkg/front_end/lib/src/fasta/problems.dart
@@ -0,0 +1,654 @@
+// Copyright (c) 2017, 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.
+
+// NOTE: THIS FILE IS GENERATED. DO NOT EDIT.
+//
+// Instead modify 'pkg/front_end/messages.yaml' and run
+// 'pkg/front_end/tool/_fasta/generate_messages.dart' to update.
+
+library fasta.problems;
+
+import 'package:front_end/src/fasta/scanner/token.dart' show Token;
+
+import 'package:front_end/src/fasta/parser/error_kind.dart' show ErrorKind;
+
+problemExpectedClassBodyToSkip(Token token) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String lexeme = token.lexeme;
+  return {
+    'message': "Expected a class body, but got '$lexeme'.",
+  
+    'code': ErrorKind.ExpectedClassBodyToSkip,
+    'arguments': {
+      'token': token,
+    },
+  };
+}
+
+problemStackOverflow() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Stack overflow.",
+  
+    'code': ErrorKind.StackOverflow,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemUnexpectedToken(Token token) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String lexeme = token.lexeme;
+  return {
+    'message': "Unexpected token '$lexeme'.",
+  
+    'code': ErrorKind.UnexpectedToken,
+    'arguments': {
+      'token': token,
+    },
+  };
+}
+
+problemAwaitAsIdentifier() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "'await' can't be used as an identifier in 'async', 'async*', or 'sync*' methods.",
+  
+    'code': ErrorKind.AwaitAsIdentifier,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemFactoryNotSync() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Factories can't use 'async', 'async*', or 'sync*'.",
+  
+    'code': ErrorKind.FactoryNotSync,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemYieldNotGenerator() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "'yield' can only be used in 'sync*' or 'async*' methods.",
+  
+    'code': ErrorKind.YieldNotGenerator,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemSetterNotSync() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Setters can't use 'async', 'async*', or 'sync*'.",
+  
+    'code': ErrorKind.SetterNotSync,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemNonAsciiWhitespace(int codePoint) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String unicode = "(U+${codePoint.toRadixString(16).padLeft(4, '0')})";
+  return {
+    'message': "The non-ASCII space character $unicode can only be used in strings and comments.",
+  
+    'code': ErrorKind.NonAsciiWhitespace,
+    'arguments': {
+      'codePoint': codePoint,
+    },
+  };
+}
+
+problemExpectedIdentifier(Token token) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String lexeme = token.lexeme;
+  return {
+    'message': "'$lexeme' is a reserved word and can't be used here.",
+    'tip': "Try using a different name.",
+    'code': ErrorKind.ExpectedIdentifier,
+    'arguments': {
+      'token': token,
+    },
+  };
+}
+
+problemExpectedBlockToSkip() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Expected a function body or '=>'.",
+    'tip': "Try adding {}.",
+    'code': ErrorKind.ExpectedBlockToSkip,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemRequiredParameterWithDefault() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Non-optional parameters can't have a default value.",
+    'tip': "Try removing the default value or making the parameter optional.",
+    'code': ErrorKind.RequiredParameterWithDefault,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemUnspecified() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "$string",
+  
+    'code': ErrorKind.Unspecified,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemMissingExponent() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Numbers in exponential notation should always contain an exponent (an integer number with an optional sign).",
+    'tip': "Make sure there is an exponent, and remove any whitespace before it.",
+    'code': ErrorKind.MissingExponent,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemPositionalParameterWithEquals() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Positional optional parameters can't use ':' to specify a default value.",
+    'tip': "Try replacing ':' with '='.",
+    'code': ErrorKind.PositionalParameterWithEquals,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemUnexpectedDollarInString() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "A '\$' has special meaning inside a string, and must be followed by an identifier or an expression in curly braces ({}).",
+    'tip': "Try adding a backslash (\) to escape the '\$'.",
+    'code': ErrorKind.UnexpectedDollarInString,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemExtraneousModifier(Token token) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String lexeme = token.lexeme;
+  return {
+    'message': "Can't have modifier '$lexeme' here.",
+    'tip': "Try removing '$lexeme'.",
+    'code': ErrorKind.ExtraneousModifier,
+    'arguments': {
+      'token': token,
+    },
+  };
+}
+
+problemEmptyOptionalParameterList() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Optional parameter lists cannot be empty.",
+    'tip': "Try adding an optional parameter to the list.",
+    'code': ErrorKind.EmptyOptionalParameterList,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemUnterminatedString(String string) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "String must end with $string.",
+  
+    'code': ErrorKind.UnterminatedString,
+    'arguments': {
+      'string': string,
+    },
+  };
+}
+
+problemAwaitNotAsync() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "'await' can only be used in 'async' or 'async*' methods.",
+  
+    'code': ErrorKind.AwaitNotAsync,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemExpectedFunctionBody(Token token) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String lexeme = token.lexeme;
+  return {
+    'message': "Expected a function body, but got '$lexeme'.",
+  
+    'code': ErrorKind.ExpectedFunctionBody,
+    'arguments': {
+      'token': token,
+    },
+  };
+}
+
+problemExpectedHexDigit() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "A hex digit (0-9 or A-F) must follow '0x'.",
+  
+    'code': ErrorKind.ExpectedHexDigit,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemEmptyNamedParameterList() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Named parameter lists cannot be empty.",
+    'tip': "Try adding a named parameter to the list.",
+    'code': ErrorKind.EmptyNamedParameterList,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemUnsupportedPrefixPlus() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "'+' is not a prefix operator. ",
+    'tip': "Try removing '+'.",
+    'code': ErrorKind.UnsupportedPrefixPlus,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemExpectedString(Token token) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String lexeme = token.lexeme;
+  return {
+    'message': "Expected a String, but got '$lexeme'.",
+  
+    'code': ErrorKind.ExpectedString,
+    'arguments': {
+      'token': token,
+    },
+  };
+}
+
+problemAbstractNotSync() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Abstract methods can't use 'async', 'async*', or 'sync*'.",
+  
+    'code': ErrorKind.AbstractNotSync,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemExpectedDeclaration(Token token) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String lexeme = token.lexeme;
+  return {
+    'message': "Expected a declaration, but got '$lexeme'.",
+  
+    'code': ErrorKind.ExpectedDeclaration,
+    'arguments': {
+      'token': token,
+    },
+  };
+}
+
+problemAsciiControlCharacter(int codePoint) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String unicode = "(U+${codePoint.toRadixString(16).padLeft(4, '0')})";
+  return {
+    'message': "The control character $unicode can only be used in strings and comments.",
+  
+    'code': ErrorKind.AsciiControlCharacter,
+    'arguments': {
+      'codePoint': codePoint,
+    },
+  };
+}
+
+problemUnmatchedToken(String string, Token token) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String lexeme = token.lexeme;
+  return {
+    'message': "Can't find '$string' to match '$lexeme'.",
+  
+    'code': ErrorKind.UnmatchedToken,
+    'arguments': {
+      'string': string,
+      'token': token,
+    },
+  };
+}
+
+problemInvalidSyncModifier() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Invalid modifier 'sync'.",
+    'tip': "Try replacing 'sync' with 'sync*'.",
+    'code': ErrorKind.InvalidSyncModifier,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemExpectedOpenParens() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Expected '('.",
+  
+    'code': ErrorKind.ExpectedOpenParens,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemUnterminatedComment() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Comment starting with '/*' must end with '*/'.",
+  
+    'code': ErrorKind.UnterminatedComment,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemExpectedClassBody(Token token) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String lexeme = token.lexeme;
+  return {
+    'message': "Expected a class body, but got '$lexeme'.",
+  
+    'code': ErrorKind.ExpectedClassBody,
+    'arguments': {
+      'token': token,
+    },
+  };
+}
+
+problemExpectedExpression(Token token) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String lexeme = token.lexeme;
+  return {
+    'message': "Expected an expression, but got '$lexeme'.",
+  
+    'code': ErrorKind.ExpectedExpression,
+    'arguments': {
+      'token': token,
+    },
+  };
+}
+
+problemInvalidAwaitFor() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "'await' is only supported in methods with an 'async' or 'async*' body modifier.",
+    'tip': "Try adding 'async' or 'async*' to the method body or removing the 'await' keyword.",
+    'code': ErrorKind.InvalidAwaitFor,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemExpectedType(Token token) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String lexeme = token.lexeme;
+  return {
+    'message': "Expected a type, but got '$lexeme'.",
+  
+    'code': ErrorKind.ExpectedType,
+    'arguments': {
+      'token': token,
+    },
+  };
+}
+
+problemUnterminatedToken() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Incomplete token.",
+  
+    'code': ErrorKind.UnterminatedToken,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemExpectedButGot(Token token) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String lexeme = token.lexeme;
+  return {
+    'message': "Expected '$lexeme' before this.",
+    'tip': "DONT_KNOW_HOW_TO_FIX,",
+    'code': ErrorKind.ExpectedButGot,
+    'arguments': {
+      'token': token,
+    },
+  };
+}
+
+problemAwaitForNotAsync() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Asynchronous for-loop can only be used in 'async' or 'async*' methods.",
+  
+    'code': ErrorKind.AwaitForNotAsync,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemEncoding() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Unable to decode bytes as UTF-8.",
+  
+    'code': ErrorKind.Encoding,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemAsyncAsIdentifier() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "'async' can't be used as an identifier in 'async', 'async*', or 'sync*' methods.",
+  
+    'code': ErrorKind.AsyncAsIdentifier,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemYieldAsIdentifier() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "'yield' can't be used as an identifier in 'async', 'async*', or 'sync*' methods.",
+  
+    'code': ErrorKind.YieldAsIdentifier,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemInvalidInlineFunctionType() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Invalid inline function type.",
+    'tip': "Try changing the inline function type (as in 'int f()') to a prefixed function type using the `Function` keyword (as in 'int Function() f').",
+    'code': ErrorKind.InvalidInlineFunctionType,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemExpectedBody() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Expected a function body or '=>'.",
+    'tip': "Try adding {}.",
+    'code': ErrorKind.ExpectedBody,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemInvalidVoid() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "Type 'void' can't be used here because it isn't a return type.",
+    'tip': "Try removing 'void' keyword or replace it with 'var', 'final', or a type.",
+    'code': ErrorKind.InvalidVoid,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemBuiltInIdentifierAsType(Token token) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String lexeme = token.lexeme;
+  return {
+    'message': "Can't use '$lexeme' as a type.",
+  
+    'code': ErrorKind.BuiltInIdentifierAsType,
+    'arguments': {
+      'token': token,
+    },
+  };
+}
+
+problemGeneratorReturnsValue() {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  
+  return {
+    'message': "'sync*' and 'async*' can't return a value.",
+  
+    'code': ErrorKind.GeneratorReturnsValue,
+    'arguments': {
+      
+    },
+  };
+}
+
+problemBuiltInIdentifierInDeclaration(Token token) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String lexeme = token.lexeme;
+  return {
+    'message': "Can't use '$lexeme' as a name here.",
+  
+    'code': ErrorKind.BuiltInIdentifierInDeclaration,
+    'arguments': {
+      'token': token,
+    },
+  };
+}
+
+problemNonAsciiIdentifier(String character, int codePoint) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String unicode = "(U+${codePoint.toRadixString(16).padLeft(4, '0')})";
+  return {
+    'message': "The non-ASCII character '$character' ($unicode) can't be used in identifiers, only in strings and comments.",
+    'tip': "Try using an US-ASCII letter, a digit, '_' (an underscore), or '\$' (a dollar sign).",
+    'code': ErrorKind.NonAsciiIdentifier,
+    'arguments': {
+      'character': character,
+      'codePoint': codePoint,
+    },
+  };
+}
+
+problemExtraneousModifierReplace(Token token) {
+  // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+  String lexeme = token.lexeme;
+  return {
+    'message': "Can't have modifier '$lexeme' here.",
+    'tip': "Try replacing modifier '$lexeme' with 'var', 'final', or a type.",
+    'code': ErrorKind.ExtraneousModifierReplace,
+    'arguments': {
+      'token': token,
+    },
+  };
+}
+