/usr/share/ada/adainclude/gpr/gpr-scans.ads is in libgpr1-dev 2017-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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-- --
-- GPR PROJECT MANAGER --
-- --
-- Copyright (C) 1992-2015, Free Software Foundation, Inc. --
-- --
-- This library is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 3, or (at your option) any later --
-- version. This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- --
-- --
-- --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
------------------------------------------------------------------------------
with GPR.Names; use GPR.Names;
with GPR.Osint; use GPR.Osint;
package GPR.Scans is
type Token_Type is
(Tok_Integer_Literal,
Tok_Real_Literal,
Tok_String_Literal,
Tok_Char_Literal,
Tok_Operator_Symbol,
Tok_Identifier,
Tok_Double_Asterisk, -- **
Tok_Ampersand, -- &
Tok_Minus, -- -
Tok_Plus, -- +
Tok_Asterisk, -- *
Tok_Mod,
Tok_Rem,
Tok_Slash, -- /
Tok_New,
Tok_Abs,
Tok_Others,
Tok_Null,
Tok_Raise,
Tok_Dot, -- .
Tok_Apostrophe, -- '
Tok_Left_Paren, -- (
Tok_Delta,
Tok_Digits,
Tok_Range,
Tok_Right_Paren, -- )
Tok_Comma, -- ,
Tok_And,
Tok_Or,
Tok_Xor,
Tok_Less, -- <
Tok_Equal, -- =
Tok_Greater, -- >
Tok_Not_Equal, -- /=
Tok_Greater_Equal, -- >=
Tok_Less_Equal, -- <=
Tok_In,
Tok_Not,
Tok_Box, -- <>
Tok_Colon_Equal, -- :=
Tok_Colon, -- :
Tok_Greater_Greater, -- >>
Tok_Abstract,
Tok_Access,
Tok_Aliased,
Tok_All,
Tok_Array,
Tok_At,
Tok_Body,
Tok_Constant,
Tok_Do,
Tok_Is,
Tok_Interface,
Tok_Limited,
Tok_Of,
Tok_Out,
Tok_Record,
Tok_Renames,
Tok_Reverse,
Tok_Some,
Tok_Tagged,
Tok_Then,
Tok_Less_Less, -- <<
Tok_Abort,
Tok_Accept,
Tok_Case,
Tok_Delay,
Tok_Else,
Tok_Elsif,
Tok_End,
Tok_Exception,
Tok_Exit,
Tok_Goto,
Tok_If,
Tok_Pragma,
Tok_Requeue,
Tok_Return,
Tok_Select,
Tok_Terminate,
Tok_Until,
Tok_When,
Tok_Begin,
Tok_Declare,
Tok_For,
Tok_Loop,
Tok_While,
Tok_Entry,
Tok_Protected,
Tok_Task,
Tok_Type,
Tok_Subtype,
Tok_Overriding,
Tok_Synchronized,
Tok_Use,
Tok_Function,
Tok_Generic,
Tok_Package,
Tok_Procedure,
Tok_Private,
Tok_With,
Tok_Separate,
Tok_EOF,
Tok_Semicolon,
Tok_Arrow, -- =>
Tok_Vertical_Bar, -- |
Tok_Dot_Dot, -- ..
Tok_Project,
Tok_Extends,
Tok_External,
Tok_External_As_List,
Tok_Comment,
Tok_End_Of_Line,
Tok_Special,
Tok_SPARK_Hide,
No_Token);
-- No_Token is used for initializing Token values to indicate that no value
-- has been set yet.
subtype Token_Class_Cunit is
Token_Type range Tok_Function .. Tok_Separate;
-- Tokens which can begin a compilation unit
subtype Token_Class_Literal is
Token_Type range Tok_Integer_Literal .. Tok_Operator_Symbol;
-- Literal
type Token_Flag_Array is array (Token_Type) of Boolean;
Is_Reserved_Keyword : constant Token_Flag_Array :=
Token_Flag_Array'
(Tok_Mod .. Tok_Rem => True,
Tok_New .. Tok_Null => True,
Tok_Delta .. Tok_Range => True,
Tok_And .. Tok_Xor => True,
Tok_In .. Tok_Not => True,
Tok_Abstract .. Tok_Then => True,
Tok_Abort .. Tok_Separate => True,
others => False);
-- Flag array used to test for reserved word
Special_Character : Character;
-- Valid only when Token = Tok_Special. Returns one of the characters
-- '#', '$', '?', '@', '`', '\', '^', '~', or '_'.
--------------------------
-- Scan State Variables --
--------------------------
-- Note: these variables can only be referenced during the parsing of a
-- file. Reference to any of them from Sem or the expander is wrong.
-- These variables are initialized as required by Scn.Initialize_Scanner,
-- and should not be referenced before such a call. However, there are
-- situations in which these variables are saved and restored, and this
-- may happen before the first Initialize_Scanner call, resulting in the
-- assignment of invalid values. To avoid this, and allow building with
-- the -gnatVa switch, we initialize some variables to known valid values.
Scan_Ptr : Source_Ptr := No_Location; -- init for -gnatVa
-- Current scan pointer location. After a call to Scan, this points
-- just past the end of the token just scanned.
Token : Token_Type := No_Token; -- init for -gnatVa
-- Type of current token
Token_Ptr : Source_Ptr := No_Location; -- init for -gnatVa
-- Pointer to first character of current token
Current_Line_Start : Source_Ptr := No_Location; -- init for -gnatVa
-- Pointer to first character of line containing current token
Start_Column : Column_Number := No_Column_Number; -- init for -gnatVa
-- Starting column number (zero origin) of the first non-blank character on
-- the line containing the current token. This is used for error recovery
-- circuits which depend on looking at the column line up.
Type_Token_Location : Source_Ptr := No_Location; -- init for -gnatVa
-- Within a type declaration, gives the location of the TYPE keyword that
-- opened the type declaration. Used in checking the end column of a record
-- declaration, which can line up either with the TYPE keyword, or with the
-- start of the line containing the RECORD keyword.
Checksum : Word := 0; -- init for -gnatVa
-- Used to accumulate a CRC representing the tokens in the source file
-- being compiled. This CRC includes only program tokens, and excludes
-- comments.
First_Non_Blank_Location : Source_Ptr := No_Location; -- init for -gnatVa
-- Location of first non-blank character on the line containing the current
-- token (i.e. the location of the character whose column number is stored
-- in Start_Column).
Token_Node : Node_Id := Empty_Node;
-- Node table Id for the current token. This is set only if the current
-- token is one for which the scanner constructs a node (i.e. it is
-- an identifier, operator symbol, or literal). For other token types,
-- Token_Node is undefined.
Token_Name : Name_Id := No_Name;
-- For identifiers, this is set to the Name_Id of the identifier scanned.
-- For all other tokens, Token_Name is set to Error_Name. Note that it
-- would be possible for the caller to extract this information from
-- Token_Node. We set Token_Name separately for two reasons. First it
-- allows a quicker test for a specific identifier. Second, it allows a
-- version of the parser to be built that does not build tree nodes,
-- usable as a syntax checker.
Prev_Token : Token_Type := No_Token;
-- Type of previous token
Prev_Token_Ptr : Source_Ptr;
-- Pointer to first character of previous token
Comment_Id : Name_Id := No_Name;
-- Valid only when Token = Tok_Comment. Store the string that follows the
-- "--" of a comment when scanning project files.
Character_Code : Char_Code;
-- Valid only when Token is Tok_Char_Literal. Contains the value of the
-- scanned literal.
Int_Literal_Value : Int;
-- Valid only when Token = Tok_Integer_Literal, contains the value of the
-- scanned literal.
--------------------------------------------------------
-- Procedures for Saving and Restoring the Scan State --
--------------------------------------------------------
-- The following procedures can be used to save and restore the entire
-- scan state. They are used in cases where it is necessary to backup
-- the scan during the parse.
type Saved_Scan_State is private;
-- Used for saving and restoring the scan state
procedure Save_Scan_State (Saved_State : out Saved_Scan_State);
-- pragma Inline (Save_Scan_State); Saves the current scan state for
-- possible later restoration. Note that there is no harm in saving
-- the state and then never restoring it.
procedure Restore_Scan_State (Saved_State : Saved_Scan_State);
-- pragma Inline (Restore_Scan_State);
-- Restores a scan state saved by a call to Save_Scan_State.
-- The saved scan state must refer to the current source file.
private
type Saved_Scan_State is record
Save_Scan_Ptr : Source_Ptr;
Save_Token : Token_Type;
Save_Token_Ptr : Source_Ptr;
Save_Current_Line_Start : Source_Ptr;
Save_Start_Column : Column_Number;
Save_Checksum : Word;
Save_First_Non_Blank_Location : Source_Ptr;
Save_Token_Node : Node_Id;
Save_Token_Name : Name_Id;
Save_Prev_Token : Token_Type;
Save_Prev_Token_Ptr : Source_Ptr;
end record;
end GPR.Scans;
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