1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- W A R N S W -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1999-2013, Free Software Foundation, Inc. -- 10-- -- 11-- GNAT is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 3, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- 17-- for more details. You should have received a copy of the GNU General -- 18-- Public License distributed with GNAT; see file COPYING3. If not, go to -- 19-- http://www.gnu.org/licenses for a complete copy of the license. -- 20-- -- 21-- GNAT was originally developed by the GNAT team at New York University. -- 22-- Extensive contributions were provided by Ada Core Technologies Inc. -- 23-- -- 24------------------------------------------------------------------------------ 25 26-- This unit contains the routines used to handle setting of warning options 27 28package Warnsw is 29 30 ------------------- 31 -- Warning Flags -- 32 ------------------- 33 34 -- These flags are activated or deactivated by -gnatw switches and control 35 -- whether warnings of a given class will be generated or not. 36 37 -- Note: most of these flags are still in opt, but the plan is to move them 38 -- here as time goes by. And in fact a really nice idea would be to put 39 -- them all in a Warn_Record so that they would be easy to save/restore. 40 41 Warn_On_Record_Holes : Boolean := False; 42 -- Warn when explicit record component clauses leave uncovered holes (gaps) 43 -- in a record layout. Off by default, set by -gnatw.h (but not -gnatwa). 44 45 Warn_On_Overridden_Size : Boolean := False; 46 -- Warn when explicit record component clause or array component_size 47 -- clause specifies a size that overrides a size for the typen which was 48 -- set with an explicit size clause. Off by default, modified by use of 49 -- -gnatw.s/.S, but not set by -gnatwa. 50 51 Warn_On_Standard_Redefinition : Boolean := False; 52 -- Warn when a program defines an identifier that matches a name in 53 -- Standard. Off by default, modified by use of -gnatw.k/.K, but not 54 -- affected by -gnatwa. 55 56 ----------------------------------- 57 -- Saving and Restoring Warnings -- 58 ----------------------------------- 59 60 -- Type used to save and restore warnings 61 62 type Warning_Record is record 63 Address_Clause_Overlay_Warnings : Boolean; 64 Check_Unreferenced : Boolean; 65 Check_Unreferenced_Formals : Boolean; 66 Check_Withs : Boolean; 67 Constant_Condition_Warnings : Boolean; 68 Elab_Info_Messages : Boolean; 69 Elab_Warnings : Boolean; 70 Implementation_Unit_Warnings : Boolean; 71 Ineffective_Inline_Warnings : Boolean; 72 List_Body_Required_Info : Boolean; 73 List_Inherited_Aspects : Boolean; 74 Warning_Doc_Switch : Boolean; 75 Warn_On_Ada_2005_Compatibility : Boolean; 76 Warn_On_Ada_2012_Compatibility : Boolean; 77 Warn_On_All_Unread_Out_Parameters : Boolean; 78 Warn_On_Assertion_Failure : Boolean; 79 Warn_On_Assumed_Low_Bound : Boolean; 80 Warn_On_Atomic_Synchronization : Boolean; 81 Warn_On_Bad_Fixed_Value : Boolean; 82 Warn_On_Biased_Representation : Boolean; 83 Warn_On_Constant : Boolean; 84 Warn_On_Deleted_Code : Boolean; 85 Warn_On_Dereference : Boolean; 86 Warn_On_Export_Import : Boolean; 87 Warn_On_Hiding : Boolean; 88 Warn_On_Modified_Unread : Boolean; 89 Warn_On_No_Value_Assigned : Boolean; 90 Warn_On_Non_Local_Exception : Boolean; 91 Warn_On_Object_Renames_Function : Boolean; 92 Warn_On_Obsolescent_Feature : Boolean; 93 Warn_On_Overlap : Boolean; 94 Warn_On_Overridden_Size : Boolean; 95 Warn_On_Parameter_Order : Boolean; 96 Warn_On_Questionable_Missing_Parens : Boolean; 97 Warn_On_Record_Holes : Boolean; 98 Warn_On_Redundant_Constructs : Boolean; 99 Warn_On_Reverse_Bit_Order : Boolean; 100 Warn_On_Standard_Redefinition : Boolean; 101 Warn_On_Suspicious_Contract : Boolean; 102 Warn_On_Unchecked_Conversion : Boolean; 103 Warn_On_Unordered_Enumeration_Type : Boolean; 104 Warn_On_Unrecognized_Pragma : Boolean; 105 Warn_On_Unrepped_Components : Boolean; 106 Warn_On_Warnings_Off : Boolean; 107 end record; 108 109 function Save_Warnings return Warning_Record; 110 -- Returns current settingh of warnings 111 112 procedure Restore_Warnings (W : Warning_Record); 113 -- Restores current settings of warning flags from W 114 115 ----------------- 116 -- Subprograms -- 117 ----------------- 118 119 function Set_Warning_Switch (C : Character) return Boolean; 120 -- This function sets the warning switch or switches corresponding to the 121 -- given character. It is used to process a -gnatw switch on the command 122 -- line, or a character in a string literal in pragma Warnings. Returns 123 -- True for valid warning character C, False for invalid character. 124 125 function Set_Dot_Warning_Switch (C : Character) return Boolean; 126 -- This function sets the warning switch or switches corresponding to the 127 -- given character preceded by a dot. Used to process a -gnatw. switch on 128 -- the command line or .C in a string literal in pragma Warnings. Returns 129 -- True for valid warning character C, False for invalid character. 130 131 procedure Set_GNAT_Mode_Warnings; 132 -- This is called in -gnatg mode to set the warnings for gnat mode. It is 133 -- also used to set the proper warning statuses for -gnatw.g. Note that 134 -- this set of warnings is disjoint from -gnatwa, it enables warnings that 135 -- are not included in -gnatwa, and it disables warnings that are included 136 -- in -gnatwa (such as Warn_On_Implementation_Units, which we clearly want 137 -- to be False for units built with -gnatg). 138 139end Warnsw; 140