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1 706 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT COMPILER COMPONENTS                         --
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--                                                                          --
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--                                S T Y L E                                 --
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--                                                                          --
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--                                 S p e c                                  --
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--                                                                          --
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--          Copyright (C) 1992-2010, Free Software Foundation, Inc.         --
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--                                                                          --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
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-- for  more details.  You should have  received  a copy of the GNU General --
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-- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
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-- http://www.gnu.org/licenses for a complete copy of the license.          --
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--                                                                          --
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-- GNAT was originally developed  by the GNAT team at  New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc.      --
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--                                                                          --
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------------------------------------------------------------------------------
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--  This package collects all the routines used for style checking in the
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--  compiler, as activated by the relevant command line option. These are
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--  gathered in a separate package so that they can more easily be customized.
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--  Calls to these subprograms are only made if Opt.Style_Check is set True.
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with Errout;
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with Styleg;
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with Types;    use Types;
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package Style is
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   procedure Body_With_No_Spec (N : Node_Id);
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   --  Called where N is a subprogram body node for a subprogram body
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   --  for which no spec was given, i.e. a body acting as its own spec.
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   procedure Check_Array_Attribute_Index
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     (N  : Node_Id;
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      E1 : Node_Id;
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      D  : Int);
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   --  Called for an array attribute specifying an index number. N is the
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   --  node for the attribute, and E1 is the index expression (Empty if none
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   --  present). If E1 is present, it is known to be a static integer. D is
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   --  the number of dimensions of the array.
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   procedure Check_Identifier
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     (Ref : Node_Or_Entity_Id;
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      Def : Node_Or_Entity_Id);
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   --  Check style of identifier occurrence. Ref is an N_Identifier node whose
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   --  spelling is to be checked against the Chars spelling in identifier node
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   --  Def (which may be either an N_Identifier, or N_Defining_Identifier node)
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   procedure Missing_Overriding (N : Node_Id; E : Entity_Id);
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   --  Called where N is the declaration or body of an overriding operation,
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   --  and the node does not have an overriding_indicator.
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   procedure Subprogram_Not_In_Alpha_Order (Name : Node_Id);
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   --  Called if Name is the name of a subprogram body in a package body
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   --  that is not in alphabetical order.
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   --  Remaining style routines come from instantiation of Styleg
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   package Style_Inst is new Styleg
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     (Errout.Error_Msg,
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      Errout.Error_Msg_S,
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      Errout.Error_Msg_SC,
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      Errout.Error_Msg_SP);
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   --  Instantiation of Styleg for compiler use
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   procedure Check_Abs_Not
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     renames Style_Inst.Check_Abs_Not;
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   --  Called after scanning an ABS or NOT operator to check spacing
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   procedure Check_Apostrophe
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     renames Style_Inst.Check_Apostrophe;
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   --  Called after scanning an apostrophe to check spacing
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   procedure Check_Arrow
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     renames Style_Inst.Check_Arrow;
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   --  Called after scanning out an arrow to check spacing
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   procedure Check_Attribute_Name (Reserved : Boolean)
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     renames Style_Inst.Check_Attribute_Name;
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   --  The current token is an attribute designator. Check that it is
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   --  capitalized in an appropriate manner. Reserved is set if the attribute
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   --  designator is a reserved word (access, digits, delta or range) to allow
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   --  differing rules for the two cases.
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   procedure Check_Boolean_Operator (Node : Node_Id)
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     renames Style_Inst.Check_Boolean_Operator;
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   --  Called after resolving AND or OR node to check short circuit rules
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   procedure Check_Box
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     renames Style_Inst.Check_Box;
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   --  Called after scanning out a box to check spacing
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   procedure Check_Binary_Operator
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     renames Style_Inst.Check_Binary_Operator;
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   --  Called after scanning out a binary operator other than a plus, minus
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   --  or exponentiation operator. Intended for checking spacing rules.
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   procedure Check_Exponentiation_Operator
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     renames Style_Inst.Check_Exponentiation_Operator;
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   --  Called after scanning out an exponentiation operator. Intended for
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   --  checking spacing rules.
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   procedure Check_Colon
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     renames Style_Inst.Check_Colon;
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   --  Called after scanning out colon to check spacing
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   procedure Check_Colon_Equal
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     renames Style_Inst.Check_Colon_Equal;
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   --  Called after scanning out colon equal to check spacing
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   procedure Check_Comma
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     renames Style_Inst.Check_Comma;
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   --  Called after scanning out comma to check spacing
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   procedure Check_Comment
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     renames Style_Inst.Check_Comment;
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   --  Called with Scan_Ptr pointing to the first minus sign of a comment.
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   --  Intended for checking any specific rules for comment placement/format.
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   procedure Check_Dot_Dot
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     renames Style_Inst.Check_Dot_Dot;
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   --  Called after scanning out dot dot to check spacing
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   procedure Check_EOF
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     renames Style_Inst.Check_EOF;
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   --  Called after scanning out end of file mark
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   procedure Check_HT
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     renames Style_Inst.Check_HT;
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   --  Called with Scan_Ptr pointing to a horizontal tab character
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   procedure Check_Indentation
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     renames Style_Inst.Check_Indentation;
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   --  Called at the start of a new statement or declaration, with Token_Ptr
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   --  pointing to the first token of the statement or declaration. The check
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   --  is that the starting column is appropriate to the indentation rules if
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   --  Token_Ptr is the first token on the line.
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   procedure Check_Left_Paren
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     renames Style_Inst.Check_Left_Paren;
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   --  Called after scanning out a left parenthesis to check spacing
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   procedure Check_Line_Terminator (Len : Int)
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     renames Style_Inst.Check_Line_Terminator;
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   --  Called with Scan_Ptr pointing to the first line terminator terminating
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   --  the current line, used to check for appropriate line terminator and to
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   --  check the line length (Len is the length of the current line). Note that
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   --  the terminator may be the EOF character.
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   procedure Check_Pragma_Name
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     renames Style_Inst.Check_Pragma_Name;
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   --  The current token is a pragma identifier. Check that it is spelled
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   --  properly (i.e. with an appropriate casing convention).
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   procedure Check_Right_Paren
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     renames Style_Inst.Check_Right_Paren;
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   --  Called after scanning out a right parenthesis to check spacing
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   procedure Check_Semicolon
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     renames Style_Inst.Check_Semicolon;
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   --  Called after scanning out a semicolon to check spacing
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   procedure Check_Then (If_Loc : Source_Ptr)
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     renames Style_Inst.Check_Then;
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   --  Called to check that THEN and IF keywords are appropriately positioned.
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   --  The parameters show the first characters of the two keywords. This
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   --  procedure is called only if THEN appears at the start of a line with
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   --  Token_Ptr pointing to the THEN keyword.
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   procedure Check_Unary_Plus_Or_Minus
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     renames Style_Inst.Check_Unary_Plus_Or_Minus;
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   --  Called after scanning a unary plus or minus to check spacing
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   procedure Check_Vertical_Bar
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     renames Style_Inst.Check_Vertical_Bar;
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   --  Called after scanning a vertical bar to check spacing
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   procedure Check_Xtra_Parens (Loc : Source_Ptr)
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     renames Style_Inst.Check_Xtra_Parens;
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   --  Called after scanning a conditional expression that has at least one
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   --  level of parentheses around the entire expression.
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   function Mode_In_Check return Boolean
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     renames Style_Inst.Mode_In_Check;
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   --  Determines whether style checking is active and the Mode_In_Check is
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   --  set, forbidding the explicit use of mode IN.
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   procedure No_End_Name (Name : Node_Id)
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     renames Style_Inst.No_End_Name;
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   --  Called if an END is encountered where a name is allowed but not present.
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   --  The parameter is the node whose name is the name that is permitted in
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   --  the END line, and the scan pointer is positioned so that if an error
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   --  message is to be generated in this situation, it should be generated
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   --  using Error_Msg_SP.
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   procedure No_Exit_Name (Name : Node_Id)
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     renames Style_Inst.No_Exit_Name;
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   --  Called when exiting a named loop, but a name is not present on the EXIT.
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   --  The parameter is the node whose name should have followed EXIT, and the
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   --  scan pointer is positioned so that if an error message is to be
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   --  generated, it should be generated using Error_Msg_SP.
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   procedure Non_Lower_Case_Keyword
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     renames Style_Inst.Non_Lower_Case_Keyword;
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   --  Called if a reserved keyword is scanned which is not spelled in all
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   --  lower case letters. On entry Token_Ptr points to the keyword token.
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   --  This is not used for keywords appearing as attribute designators,
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   --  where instead Check_Attribute_Name (True) is called.
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end Style;

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