gcc/ada/styleg.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                              S T Y L E G                                 --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2006, 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 2,  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 COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- GNAT was originally developed  by the GNAT team at  New York University. --
  23 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  24 --                                                                          --
  25 ------------------------------------------------------------------------------
  26
  27 --  This generic package collects the routines used for style checking, as
  28 --  activated by the relevant command line option. These are gathered in
  29 --  a separate package so that they can more easily be customized. Calls
  30 --  to these subprograms are only made if Opt.Style_Check is set True.
  31 --  Styleg does not depends on the GNAT tree (Atree, Sinfo, ...).
  32
  33 --  For the compiler, there is also a child package Styleg.C that depends
  34 --  on the GNAT tree.
  35
  36 with Types; use Types;
  37
  38 generic
  39    with procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr);
  40    --  Output a message at specified location
  41
  42    with procedure Error_Msg_S (Msg : String);
  43    --  Output a message at current scan pointer location
  44
  45    with procedure Error_Msg_SC (Msg : String);
  46    --  Output a message at the start of the current token
  47
  48    with procedure Error_Msg_SP (Msg : String);
  49    --  Output a message at the start of the previous token
  50
  51 package Styleg is
  52
  53    procedure Check_Abs_Not;
  54    --  Called after scanning an ABS or NOT operator to check spacing
  55
  56    procedure Check_Apostrophe;
  57    --  Called after scanning an apostrophe to check spacing
  58
  59    procedure Check_Arrow;
  60    --  Called after scanning out an arrow to check spacing
  61
  62    procedure Check_Attribute_Name (Reserved : Boolean);
  63    --  The current token is an attribute designator. Check that it
  64    --  is capitalized in an appropriate manner. Reserved is set if
  65    --  the attribute designator is a reserved word (access, digits,
  66    --  delta or range) to allow differing rules for the two cases.
  67
  68    procedure Check_Box;
  69    --  Called after scanning out a box to check spacing
  70
  71    procedure Check_Binary_Operator;
  72    --  Called after scanning out a binary operator other than a plus, minus
  73    --  or exponentiation operator. Intended for checking spacing rules.
  74
  75    procedure Check_Exponentiation_Operator;
  76    --  Called after scanning out an exponentiation operator. Intended for
  77    --  checking spacing rules.
  78
  79    procedure Check_Colon;
  80    --  Called after scanning out colon to check spacing
  81
  82    procedure Check_Colon_Equal;
  83    --  Called after scanning out colon equal to check spacing
  84
  85    procedure Check_Comma;
  86    --  Called after scanning out comma to check spacing
  87
  88    procedure Check_Comment;
  89    --  Called with Scan_Ptr pointing to the first minus sign of a comment.
  90    --  Intended for checking any specific rules for comment placement/format.
  91
  92    procedure Check_Dot_Dot;
  93    --  Called after scanning out dot dot to check spacing
  94
  95    procedure Check_EOF;
  96    --  Called after scanning out EOF mark
  97
  98    procedure Check_HT;
  99    --  Called with Scan_Ptr pointing to a horizontal tab character
 100
 101    procedure Check_Indentation;
 102    --  Called at the start of a new statement or declaration, with Token_Ptr
 103    --  pointing to the first token of the statement or declaration. The check
 104    --  is that the starting column is appropriate to the indentation rules if
 105    --  Token_Ptr is the first token on the line.
 106
 107    procedure Check_Left_Paren;
 108    --  Called after scanning out a left parenthesis to check spacing
 109
 110    procedure Check_Line_Max_Length (Len : Int);
 111    --  Called with Scan_Ptr pointing to the first line terminator character
 112    --  terminating the current line. Used to check for appropriate line length.
 113    --  The parameter Len is the length of the current line.
 114
 115    procedure Check_Line_Terminator (Len : Int);
 116    --  Called with Scan_Ptr pointing to the first line terminator terminating
 117    --  the current line, used to check for appropriate line terminator usage.
 118    --  The parameter Len is the length of the current line.
 119
 120    procedure Check_Pragma_Name;
 121    --  The current token is a pragma identifier. Check that it is spelled
 122    --  properly (i.e. with an appropriate casing convention).
 123
 124    procedure Check_Right_Paren;
 125    --  Called after scanning out a right parenthesis to check spacing
 126
 127    procedure Check_Semicolon;
 128    --  Called after scanning out a semicolon to check spacing
 129
 130    procedure Check_Then (If_Loc : Source_Ptr);
 131    --  Called to check that THEN and IF keywords are appropriately positioned.
 132    --  The parameters show the first characters of the two keywords. This
 133    --  procedure is called only if THEN appears at the start of a line with
 134    --  Token_Ptr pointing to the THEN keyword.
 135
 136    procedure Check_Unary_Plus_Or_Minus;
 137    --  Called after scanning a unary plus or minus to check spacing
 138
 139    procedure Check_Vertical_Bar;
 140    --  Called after scanning a vertical bar to check spacing
 141
 142    procedure Check_Xtra_Parens (Loc : Source_Ptr);
 143    --  Called after scanning a conditional expression that has at least one
 144    --  level of parentheses around the entire expression.
 145
 146    function Mode_In_Check return Boolean;
 147    pragma Inline (Mode_In_Check);
 148    --  Determines whether style checking is active and the Mode_In_Check is
 149    --  set, forbidding the explicit use of mode IN.
 150
 151    procedure No_End_Name (Name : Node_Id);
 152    --  Called if an END is encountered where a name is allowed but not present.
 153    --  The parameter is the node whose name is the name that is permitted in
 154    --  the END line, and the scan pointer is positioned so that if an error
 155    --  message is to be generated in this situation, it should be generated
 156    --  using Error_Msg_SP.
 157
 158    procedure No_Exit_Name (Name : Node_Id);
 159    --  Called when exiting a named loop, but a name is not present on the EXIT.
 160    --  The parameter is the node whose name should have followed EXIT, and the
 161    --  scan pointer is positioned so that if an error message is to be
 162    --  generated, it should be generated using Error_Msg_SP.
 163
 164    procedure Non_Lower_Case_Keyword;
 165    --  Called if a reserved keyword is scanned which is not spelled in all
 166    --  lower case letters. On entry Token_Ptr points to the keyword token.
 167    --  This is not used for keywords appearing as attribute designators,
 168    --  where instead Check_Attribute_Name (True) is called.
 169
 170    function RM_Column_Check return Boolean;
 171    pragma Inline (RM_Column_Check);
 172    --  Determines whether style checking is active and the RM column check
 173    --  mode is set requiring checking of RM format layout.
 174
 175 end Styleg;