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) 1992-2012, 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 generic package collects the routines used for style checking, as
  27 --  activated by the relevant command line option. These are gathered in
  28 --  a separate package so that they can more easily be customized. Calls
  29 --  to these subprograms are only made if Opt.Style_Check is set True.
  30 --  Styleg does not depends on the GNAT tree (Atree, Sinfo, ...).
  31
  32 with Types; use Types;
  33
  34 generic
  35    with procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr);
  36    --  Output a message at specified location
  37
  38    with procedure Error_Msg_S (Msg : String);
  39    --  Output a message at current scan pointer location
  40
  41    with procedure Error_Msg_SC (Msg : String);
  42    --  Output a message at the start of the current token
  43
  44    with procedure Error_Msg_SP (Msg : String);
  45    --  Output a message at the start of the previous token
  46
  47 package Styleg is
  48
  49    procedure Check_Abs_Not;
  50    --  Called after scanning an ABS or NOT operator to check spacing
  51
  52    procedure Check_Apostrophe;
  53    --  Called after scanning an apostrophe to check spacing
  54
  55    procedure Check_Arrow;
  56    --  Called after scanning out an arrow to check spacing
  57
  58    procedure Check_Attribute_Name (Reserved : Boolean);
  59    --  The current token is an attribute designator. Check that it
  60    --  is capitalized in an appropriate manner. Reserved is set if
  61    --  the attribute designator is a reserved word (access, digits,
  62    --  delta or range) to allow differing rules for the two cases.
  63
  64    procedure Check_Boolean_Operator (Node : Node_Id);
  65    --  Node is a node for an AND or OR operator. Check that the usage meets
  66    --  the style rules.
  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_Not_In;
 121    --  Called with Scan_Ptr pointing to an IN token, and Prev_Token_Ptr
 122    --  pointing to a NOT token. Used to check proper layout of NOT IN.
 123
 124    procedure Check_Pragma_Name;
 125    --  The current token is a pragma identifier. Check that it is spelled
 126    --  properly (i.e. with an appropriate casing convention).
 127
 128    procedure Check_Right_Paren;
 129    --  Called after scanning out a right parenthesis to check spacing
 130
 131    procedure Check_Semicolon;
 132    --  Called after scanning out a semicolon to check spacing
 133
 134    procedure Check_Then (If_Loc : Source_Ptr);
 135    --  Called to check that THEN and IF keywords are appropriately positioned.
 136    --  The parameters show the first characters of the two keywords. This
 137    --  procedure is called only if THEN appears at the start of a line with
 138    --  Token_Ptr pointing to the THEN keyword.
 139
 140    procedure Check_Separate_Stmt_Lines;
 141    pragma Inline (Check_Separate_Stmt_Lines);
 142    --  Called after scanning THEN (not preceded by AND) or ELSE (not preceded
 143    --  by OR). Used to check that no tokens follow on the same line (which
 144    --  would interfere with coverage testing). Handles case of THEN ABORT as
 145    --  an exception, as well as PRAGMA after ELSE.
 146
 147    procedure Check_Unary_Plus_Or_Minus;
 148    --  Called after scanning a unary plus or minus to check spacing
 149
 150    procedure Check_Vertical_Bar;
 151    --  Called after scanning a vertical bar to check spacing
 152
 153    procedure Check_Xtra_Parens (Loc : Source_Ptr);
 154    --  Called after scanning an if, case, or quantified expression that has at
 155    --  least one level of parentheses around the entire expression.
 156
 157    function Mode_In_Check return Boolean;
 158    pragma Inline (Mode_In_Check);
 159    --  Determines whether style checking is active and the Mode_In_Check is
 160    --  set, forbidding the explicit use of mode IN.
 161
 162    procedure No_End_Name (Name : Node_Id);
 163    --  Called if an END is encountered where a name is allowed but not present.
 164    --  The parameter is the node whose name is the name that is permitted in
 165    --  the END line, and the scan pointer is positioned so that if an error
 166    --  message is to be generated in this situation, it should be generated
 167    --  using Error_Msg_SP.
 168
 169    procedure No_Exit_Name (Name : Node_Id);
 170    --  Called when exiting a named loop, but a name is not present on the EXIT.
 171    --  The parameter is the node whose name should have followed EXIT, and the
 172    --  scan pointer is positioned so that if an error message is to be
 173    --  generated, it should be generated using Error_Msg_SP.
 174
 175    procedure Non_Lower_Case_Keyword;
 176    --  Called if a reserved keyword is scanned which is not spelled in all
 177    --  lower case letters. On entry Token_Ptr points to the keyword token.
 178    --  This is not used for keywords appearing as attribute designators,
 179    --  where instead Check_Attribute_Name (True) is called.
 180
 181 end Styleg;