Async Functions for ES6

src/compiler/diagnosticInformationMap.generated.ts

@@ -34,8 +34,12 @@ module ts {
         Statements_are_not_allowed_in_ambient_contexts: { code: 1036, category: DiagnosticCategory.Error, key: "Statements are not allowed in ambient contexts." },
         A_declare_modifier_cannot_be_used_in_an_already_ambient_context: { code: 1038, category: DiagnosticCategory.Error, key: "A 'declare' modifier cannot be used in an already ambient context." },
         Initializers_are_not_allowed_in_ambient_contexts: { code: 1039, category: DiagnosticCategory.Error, key: "Initializers are not allowed in ambient contexts." },
+        _0_modifier_cannot_be_used_in_an_ambient_context: { code: 1040, category: DiagnosticCategory.Error, key: "'{0}' modifier cannot be used in an ambient context." },
+        _0_modifier_cannot_be_used_with_a_class_declaration: { code: 1041, category: DiagnosticCategory.Error, key: "'{0}' modifier cannot be used with a class declaration." },
+        _0_modifier_cannot_be_used_here: { code: 1042, category: DiagnosticCategory.Error, key: "'{0}' modifier cannot be used here." },
+        _0_modifier_cannot_appear_on_a_data_property: { code: 1043, category: DiagnosticCategory.Error, key: "'{0}' modifier cannot appear on a data property." },
         _0_modifier_cannot_appear_on_a_module_element: { code: 1044, category: DiagnosticCategory.Error, key: "'{0}' modifier cannot appear on a module element." },
-        A_declare_modifier_cannot_be_used_with_an_interface_declaration: { code: 1045, category: DiagnosticCategory.Error, key: "A 'declare' modifier cannot be used with an interface declaration." },
+        A_0_modifier_cannot_be_used_with_an_interface_declaration: { code: 1045, category: DiagnosticCategory.Error, key: "A '{0}' modifier cannot be used with an interface declaration." },
         A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: { code: 1046, category: DiagnosticCategory.Error, key: "A 'declare' modifier is required for a top level declaration in a .d.ts file." },
         A_rest_parameter_cannot_be_optional: { code: 1047, category: DiagnosticCategory.Error, key: "A rest parameter cannot be optional." },
         A_rest_parameter_cannot_have_an_initializer: { code: 1048, category: DiagnosticCategory.Error, key: "A rest parameter cannot have an initializer." },
@@ -45,11 +49,13 @@ module ts {
         A_set_accessor_cannot_have_rest_parameter: { code: 1053, category: DiagnosticCategory.Error, key: "A 'set' accessor cannot have rest parameter." },
         A_get_accessor_cannot_have_parameters: { code: 1054, category: DiagnosticCategory.Error, key: "A 'get' accessor cannot have parameters." },
         Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: { code: 1056, category: DiagnosticCategory.Error, key: "Accessors are only available when targeting ECMAScript 5 and higher." },
+        An_async_function_or_method_must_have_a_valid_awaitable_return_type: { code: 1057, category: DiagnosticCategory.Error, key: "An async function or method must have a valid awaitable return type." },
+        Type_for_await_does_not_have_a_valid_callable_then_member: { code: 1058, category: DiagnosticCategory.Error, key: "Type for 'await' does not have a valid callable 'then' member." },
         Enum_member_must_have_initializer: { code: 1061, category: DiagnosticCategory.Error, key: "Enum member must have initializer." },
         An_export_assignment_cannot_be_used_in_a_namespace: { code: 1063, category: DiagnosticCategory.Error, key: "An export assignment cannot be used in a namespace." },
         Ambient_enum_elements_can_only_have_integer_literal_initializers: { code: 1066, category: DiagnosticCategory.Error, key: "Ambient enum elements can only have integer literal initializers." },
         Unexpected_token_A_constructor_method_accessor_or_property_was_expected: { code: 1068, category: DiagnosticCategory.Error, key: "Unexpected token. A constructor, method, accessor, or property was expected." },
-        A_declare_modifier_cannot_be_used_with_an_import_declaration: { code: 1079, category: DiagnosticCategory.Error, key: "A 'declare' modifier cannot be used with an import declaration." },
+        A_0_modifier_cannot_be_used_with_an_import_declaration: { code: 1079, category: DiagnosticCategory.Error, key: "A '{0}' modifier cannot be used with an import declaration." },
         Invalid_reference_directive_syntax: { code: 1084, category: DiagnosticCategory.Error, key: "Invalid 'reference' directive syntax." },
         Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: { code: 1085, category: DiagnosticCategory.Error, key: "Octal literals are not available when targeting ECMAScript 5 and higher." },
         An_accessor_cannot_be_declared_in_an_ambient_context: { code: 1086, category: DiagnosticCategory.Error, key: "An accessor cannot be declared in an ambient context." },
@@ -120,7 +126,7 @@ module ts {
         Unterminated_template_literal: { code: 1160, category: DiagnosticCategory.Error, key: "Unterminated template literal." },
         Unterminated_regular_expression_literal: { code: 1161, category: DiagnosticCategory.Error, key: "Unterminated regular expression literal." },
         An_object_member_cannot_be_declared_optional: { code: 1162, category: DiagnosticCategory.Error, key: "An object member cannot be declared optional." },
-        yield_expression_must_be_contained_within_a_generator_declaration: { code: 1163, category: DiagnosticCategory.Error, key: "'yield' expression must be contained_within a generator declaration." },
+        yield_expression_must_be_contained_within_a_generator_declaration: { code: 1163, category: DiagnosticCategory.Error, key: "'yield' expression must be contained within a generator declaration." },
         Computed_property_names_are_not_allowed_in_enums: { code: 1164, category: DiagnosticCategory.Error, key: "Computed property names are not allowed in enums." },
         A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol: { code: 1165, category: DiagnosticCategory.Error, key: "A computed property name in an ambient context must directly refer to a built-in symbol." },
         A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol: { code: 1166, category: DiagnosticCategory.Error, key: "A computed property name in a class property declaration must directly refer to a built-in symbol." },
@@ -174,6 +180,18 @@ module ts {
         Type_expected_0_is_a_reserved_word_in_strict_mode: { code: 1215, category: DiagnosticCategory.Error, key: "Type expected. '{0}' is a reserved word in strict mode" },
         Type_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: { code: 1216, category: DiagnosticCategory.Error, key: "Type expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode." },
         Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: DiagnosticCategory.Error, key: "Export assignment is not supported when '--module' flag is 'system'." },
+        with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: DiagnosticCategory.Error, key: "'with' statements are not allowed in an async function block." },
+        _0_modifier_cannot_be_used_with_a_generator: { code: 1301, category: DiagnosticCategory.Error, key: "'{0}' modifier cannot be used with a generator." },
+        _0_modifier_cannot_be_used_with_a_module_declaration: { code: 1302, category: DiagnosticCategory.Error, key: "'{0}' modifier cannot be used with a module declaration." },
+        _0_modifier_cannot_be_used_with_an_enum_declaration: { code: 1303, category: DiagnosticCategory.Error, key: "'{0}' modifier cannot be used with an enum declaration." },
+        _0_modifier_cannot_be_used_with_an_export_assignment_declaration: { code: 1304, category: DiagnosticCategory.Error, key: "'{0}' modifier cannot be used with an export assignment declaration." },
+        _0_modifier_cannot_be_used_on_a_variable_statement: { code: 1305, category: DiagnosticCategory.Error, key: "'{0}' modifier cannot be used on a variable statement." },
+        _0_modifier_cannot_be_used_with_a_type_declaration: { code: 1306, category: DiagnosticCategory.Error, key: "'{0}' modifier cannot be used with a type declaration." },
+        _0_modifier_cannot_be_used_with_a_parameter_declaration: { code: 1307, category: DiagnosticCategory.Error, key: "'{0}' modifier cannot be used with a parameter declaration." },
+        await_expression_must_be_contained_within_an_async_function: { code: 1308, category: DiagnosticCategory.Error, key: "'await' expression must be contained within an async function." },
+        _0_modifier_cannot_be_used_on_an_object_literal_element: { code: 1309, category: DiagnosticCategory.Error, key: "'{0}' modifier cannot be used on an object literal element." },
+        _0_expression_is_not_allowed_in_an_initializer: { code: 1310, category: DiagnosticCategory.Error, key: "'{0}' expression is not allowed in an initializer." },
+        Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher: { code: 1311, category: DiagnosticCategory.Error, key: "Async functions are only available when targeting ECMAScript 6 and higher." },
         Duplicate_identifier_0: { code: 2300, category: DiagnosticCategory.Error, key: "Duplicate identifier '{0}'." },
         Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: DiagnosticCategory.Error, key: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
         Static_members_cannot_reference_class_type_parameters: { code: 2302, category: DiagnosticCategory.Error, key: "Static members cannot reference class type parameters." },
@@ -363,6 +381,9 @@ module ts {
         An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2499, category: DiagnosticCategory.Error, key: "An interface can only extend an identifier/qualified-name with optional type arguments." },
         A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2500, category: DiagnosticCategory.Error, key: "A class can only implement an identifier/qualified-name with optional type arguments." },
         A_rest_element_cannot_contain_a_binding_pattern: { code: 2501, category: DiagnosticCategory.Error, key: "A rest element cannot contain a binding pattern." },
+        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: { code: 2520, category: DiagnosticCategory.Error, key: "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions." },
+        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: { code: 2521, category: DiagnosticCategory.Error, key: "Expression resolves to variable declaration '{0}' that compiler uses to support async functions." },
+        The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_function_expression: { code: 2522, category: DiagnosticCategory.Error, key: "The 'arguments' object cannot be referenced in an async arrow function Consider using a standard async function expression." },
         _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: { code: 2502, category: DiagnosticCategory.Error, key: "'{0}' is referenced directly or indirectly in its own type annotation." },
         Cannot_find_namespace_0: { code: 2503, category: DiagnosticCategory.Error, key: "Cannot find namespace '{0}'." },
         Import_declaration_0_is_using_private_name_1: { code: 4000, category: DiagnosticCategory.Error, key: "Import declaration '{0}' is using private name '{1}'." },
@@ -507,6 +528,7 @@ module ts {
         Specifies_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: { code: 6060, category: DiagnosticCategory.Message, key: "Specifies the end of line sequence to be used when emitting files: 'CRLF' (dos) or 'LF' (unix)." },
         NEWLINE: { code: 6061, category: DiagnosticCategory.Message, key: "NEWLINE" },
         Argument_for_newLine_option_must_be_CRLF_or_LF: { code: 6062, category: DiagnosticCategory.Error, key: "Argument for '--newLine' option must be 'CRLF' or 'LF'." },
+        Emit_async_functions_when_ECMAScript_target_version_is_lower_than_ES6: { code: 6063, category: DiagnosticCategory.Message, key: "Emit async functions when ECMAScript target version is lower than 'ES6'." },
         Variable_0_implicitly_has_an_1_type: { code: 7005, category: DiagnosticCategory.Error, key: "Variable '{0}' implicitly has an '{1}' type." },
         Parameter_0_implicitly_has_an_1_type: { code: 7006, category: DiagnosticCategory.Error, key: "Parameter '{0}' implicitly has an '{1}' type." },
         Member_0_implicitly_has_an_1_type: { code: 7008, category: DiagnosticCategory.Error, key: "Member '{0}' implicitly has an '{1}' type." },

src/compiler/diagnosticMessages.json

@@ -123,11 +123,27 @@
         "category": "Error",
         "code": 1039
     },
+    "'{0}' modifier cannot be used in an ambient context.": {
+        "category": "Error",
+        "code": 1040
+    },
+    "'{0}' modifier cannot be used with a class declaration.": {
+        "category": "Error",
+        "code": 1041
+    },
+    "'{0}' modifier cannot be used here.": {
+        "category": "Error",
+        "code": 1042
+    },
+    "'{0}' modifier cannot appear on a data property.": {
+        "category": "Error",
+        "code": 1043
+    },
     "'{0}' modifier cannot appear on a module element.": {
         "category": "Error",
         "code": 1044
     },
-    "A 'declare' modifier cannot be used with an interface declaration.": {
+    "A '{0}' modifier cannot be used with an interface declaration.": {
         "category": "Error",
         "code": 1045
     },
@@ -167,6 +183,14 @@
         "category": "Error",
         "code": 1056
     },
+    "An async function or method must have a valid awaitable return type.": {
+        "category": "Error",
+        "code": 1057
+    },
+    "Type for 'await' does not have a valid callable 'then' member.": {
+        "category": "Error",
+        "code": 1058
+    },
     "Enum member must have initializer.": {
         "category": "Error",
         "code": 1061
@@ -183,7 +207,7 @@
         "category": "Error",
         "code": 1068
     },
-    "A 'declare' modifier cannot be used with an import declaration.": {
+    "A '{0}' modifier cannot be used with an import declaration.": {
         "category": "Error",
         "code": 1079
     },
@@ -467,7 +491,7 @@
         "category": "Error",
         "code": 1162
     },
-    "'yield' expression must be contained_within a generator declaration.": {
+    "'yield' expression must be contained within a generator declaration.": {
         "category": "Error",
         "code": 1163
     },
@@ -684,6 +708,55 @@
         "code": 1218
     },
 
+    "'with' statements are not allowed in an async function block.": {
+        "category": "Error",
+        "code": 1300
+    },
+    "'{0}' modifier cannot be used with a generator.": {
+        "category": "Error",
+        "code": 1301
+    },
+    "'{0}' modifier cannot be used with a module declaration.": {
+        "category": "Error",
+        "code": 1302
+    },
+    "'{0}' modifier cannot be used with an enum declaration.": {
+        "category": "Error",
+        "code": 1303
+    },
+    "'{0}' modifier cannot be used with an export assignment declaration.": {
+        "category": "Error",
+        "code": 1304
+    },
+    "'{0}' modifier cannot be used on a variable statement.": {
+        "category": "Error",
+        "code": 1305
+    },
+    "'{0}' modifier cannot be used with a type declaration.": {
+        "category": "Error",
+        "code": 1306
+    },
+    "'{0}' modifier cannot be used with a parameter declaration.": {
+        "category": "Error",
+        "code": 1307
+    },
+    "'await' expression must be contained within an async function.": {
+        "category": "Error",
+        "code": 1308
+    },
+    "'{0}' modifier cannot be used on an object literal element.": {
+        "category": "Error",
+        "code": 1309
+    },
+    "'{0}' expression is not allowed in an initializer.": {
+        "category": "Error",
+        "code": 1310
+    },
+    "Async functions are only available when targeting ECMAScript 6 and higher.": {
+        "category": "Error",
+        "code": 1311
+    },
+
     "Duplicate identifier '{0}'.": {
         "category": "Error",
         "code": 2300
@@ -1449,6 +1522,19 @@
         "code": 2503
     },
 
+    "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions.": {
+        "category": "Error",
+        "code": 2520
+    },
+    "Expression resolves to variable declaration '{0}' that compiler uses to support async functions.": {
+        "category": "Error",
+        "code": 2521
+    },
+    "The 'arguments' object cannot be referenced in an async arrow function Consider using a standard async function expression.": {
+        "category": "Error",
+        "code": 2522
+    },
+
     "Import declaration '{0}' is using private name '{1}'.": {
         "category": "Error",
         "code": 4000
@@ -2018,7 +2104,10 @@
         "category": "Error", 
         "code": 6062
     },
-
+    "Emit async functions when ECMAScript target version is lower than 'ES6'.": {
+        "category": "Message",
+        "code": 6063
+    },
 
     "Variable '{0}' implicitly has an '{1}' type.": {
         "category": "Error",