916 lines
30 KiB
Ada
916 lines
30 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- S I N P U T . L --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2020, 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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with Alloc;
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with Atree; use Atree;
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with Debug; use Debug;
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with Einfo; use Einfo;
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with Errout; use Errout;
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with Fname; use Fname;
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with Lib; use Lib;
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with Opt; use Opt;
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with Osint; use Osint;
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with Output; use Output;
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with Prep; use Prep;
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with Prepcomp; use Prepcomp;
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with Scans; use Scans;
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with Scn; use Scn;
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with Sem_Aux; use Sem_Aux;
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with Sem_Util; use Sem_Util;
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with Sinfo; use Sinfo;
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with Snames; use Snames;
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with System; use System;
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with System.OS_Lib; use System.OS_Lib;
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package body Sinput.L is
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Prep_Buffer : Text_Buffer_Ptr := null;
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-- A buffer to temporarily stored the result of preprocessing a source.
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-- It is only allocated if there is at least one source to preprocess.
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Prep_Buffer_Last : Text_Ptr := 0;
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-- Index of the last significant character in Prep_Buffer
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Initial_Size_Of_Prep_Buffer : constant := 10_000;
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-- Size of Prep_Buffer when it is first allocated
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-- When a file is to be preprocessed and the options to list symbols
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-- has been selected (switch -s), Prep.List_Symbols is called with a
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-- "foreword", a single line indicating what source the symbols apply to.
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-- The following two constant String are the start and the end of this
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-- foreword.
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Foreword_Start : constant String :=
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"Preprocessing Symbols for source """;
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Foreword_End : constant String := """";
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-----------------
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-- Subprograms --
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-----------------
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procedure Put_Char_In_Prep_Buffer (C : Character);
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-- Add one character in Prep_Buffer, extending Prep_Buffer if need be.
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-- Used to initialize the preprocessor.
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procedure New_EOL_In_Prep_Buffer;
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-- Add an LF to Prep_Buffer (used to initialize the preprocessor)
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function Load_File
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(N : File_Name_Type;
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T : Osint.File_Type) return Source_File_Index;
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-- Load a source file, a configuration pragmas file or a definition file
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-- Coding also allows preprocessing file, but not a library file ???
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-------------------------------
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-- Adjust_Instantiation_Sloc --
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-------------------------------
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procedure Adjust_Instantiation_Sloc
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(N : Node_Id;
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Factor : Sloc_Adjustment)
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is
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Loc : constant Source_Ptr := Sloc (N);
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begin
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-- We only do the adjustment if the value is between the appropriate low
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-- and high values. It is not clear that this should ever not be the
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-- case, but in practice there seem to be some nodes that get copied
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-- twice, and this is a defence against that happening.
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if Loc in Factor.Lo .. Factor.Hi then
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Set_Sloc (N, Loc + Factor.Adjust);
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end if;
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end Adjust_Instantiation_Sloc;
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--------------------------------
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-- Complete_Source_File_Entry --
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--------------------------------
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procedure Complete_Source_File_Entry is
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CSF : constant Source_File_Index := Current_Source_File;
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begin
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Trim_Lines_Table (CSF);
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Source_File.Table (CSF).Source_Checksum := Checksum;
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end Complete_Source_File_Entry;
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---------------------------------
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-- Create_Instantiation_Source --
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---------------------------------
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procedure Create_Instantiation_Source
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(Inst_Node : Entity_Id;
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Template_Id : Entity_Id;
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Factor : out Sloc_Adjustment;
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Inlined_Body : Boolean := False;
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Inherited_Pragma : Boolean := False)
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is
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Dnod : constant Node_Id := Declaration_Node (Template_Id);
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Xold : Source_File_Index;
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Xnew : Source_File_Index;
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begin
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Xold := Get_Source_File_Index (Sloc (Template_Id));
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Factor.Lo := Source_File.Table (Xold).Source_First;
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Factor.Hi := Source_File.Table (Xold).Source_Last;
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Source_File.Append (Source_File.Table (Xold));
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Xnew := Source_File.Last;
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if Debug_Flag_L then
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Write_Eol;
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Write_Str ("*** Create_Instantiation_Source: created source ");
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Write_Int (Int (Xnew));
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Write_Line ("");
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end if;
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declare
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Sold : Source_File_Record renames Source_File.Table (Xold);
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Snew : Source_File_Record renames Source_File.Table (Xnew);
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Inst_Spec : Node_Id;
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begin
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Snew.Index := Xnew;
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Snew.Inlined_Body := Inlined_Body;
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Snew.Inherited_Pragma := Inherited_Pragma;
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Snew.Template := Xold;
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-- For a genuine generic instantiation, assign new instance id. For
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-- inlined bodies or inherited pragmas, we retain that of the
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-- template, but we save the call location.
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if Inlined_Body or Inherited_Pragma then
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Snew.Inlined_Call := Sloc (Inst_Node);
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else
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-- If the spec has been instantiated already, and we are now
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-- creating the instance source for the corresponding body now,
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-- retrieve the instance id that was assigned to the spec, which
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-- corresponds to the same instantiation sloc.
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Inst_Spec := Instance_Spec (Inst_Node);
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if Present (Inst_Spec) then
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declare
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Inst_Spec_Ent : Entity_Id;
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-- Instance spec entity
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Inst_Spec_Sloc : Source_Ptr;
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-- Virtual sloc of the spec instance source
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Inst_Spec_Inst_Id : Instance_Id;
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-- Instance id assigned to the instance spec
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begin
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Inst_Spec_Ent := Defining_Entity (Inst_Spec);
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-- For a subprogram instantiation, we want the subprogram
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-- instance, not the wrapper package.
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if Present (Related_Instance (Inst_Spec_Ent)) then
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Inst_Spec_Ent := Related_Instance (Inst_Spec_Ent);
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end if;
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-- The specification of the instance entity has a virtual
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-- sloc within the instance sloc range.
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-- ??? But the Unit_Declaration_Node has the sloc of the
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-- instantiation, which is somewhat of an oddity.
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Inst_Spec_Sloc :=
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Sloc
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(Specification (Unit_Declaration_Node (Inst_Spec_Ent)));
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Inst_Spec_Inst_Id :=
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Source_File.Table
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(Get_Source_File_Index (Inst_Spec_Sloc)).Instance;
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pragma Assert
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(Sloc (Inst_Node) = Instances.Table (Inst_Spec_Inst_Id));
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Snew.Instance := Inst_Spec_Inst_Id;
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end;
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else
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Instances.Append (Sloc (Inst_Node));
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Snew.Instance := Instances.Last;
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end if;
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end if;
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-- Now compute the new values of Source_First and Source_Last and
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-- adjust the source file pointer to have the correct bounds for the
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-- new range of values.
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-- Source_First must be greater than the last Source_Last value and
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-- also must be a multiple of Source_Align.
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Snew.Source_First :=
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((Source_File.Table (Xnew - 1).Source_Last + Source_Align) /
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Source_Align) * Source_Align;
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Factor.Adjust := Snew.Source_First - Factor.Lo;
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Snew.Source_Last := Factor.Hi + Factor.Adjust;
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Set_Source_File_Index_Table (Xnew);
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Snew.Sloc_Adjust := Sold.Sloc_Adjust - Factor.Adjust;
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-- Modify the Dope of the instance Source_Text to use the
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-- above-computed bounds.
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declare
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Dope : constant Dope_Ptr :=
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new Dope_Rec'(Snew.Source_First, Snew.Source_Last);
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begin
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Snew.Source_Text := Sold.Source_Text;
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Set_Dope (Snew.Source_Text'Address, Dope);
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pragma Assert (Snew.Source_Text'First = Snew.Source_First);
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pragma Assert (Snew.Source_Text'Last = Snew.Source_Last);
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end;
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if Debug_Flag_L then
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Write_Str (" for ");
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if Nkind (Dnod) in N_Proper_Body
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and then Was_Originally_Stub (Dnod)
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then
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Write_Str ("subunit ");
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elsif Ekind (Template_Id) = E_Generic_Package then
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if Nkind (Dnod) = N_Package_Body then
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Write_Str ("body of package ");
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else
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Write_Str ("spec of package ");
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end if;
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elsif Ekind (Template_Id) = E_Function then
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Write_Str ("body of function ");
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elsif Ekind (Template_Id) = E_Procedure then
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Write_Str ("body of procedure ");
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elsif Ekind (Template_Id) = E_Generic_Function then
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Write_Str ("spec of function ");
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elsif Ekind (Template_Id) = E_Generic_Procedure then
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Write_Str ("spec of procedure ");
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elsif Ekind (Template_Id) = E_Package_Body then
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Write_Str ("body of package ");
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else pragma Assert (Ekind (Template_Id) = E_Subprogram_Body);
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if Nkind (Dnod) = N_Procedure_Specification then
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Write_Str ("body of procedure ");
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else
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Write_Str ("body of function ");
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end if;
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end if;
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Write_Name (Chars (Template_Id));
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Write_Eol;
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Write_Str (" copying from file name = ");
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Write_Name (File_Name (Xold));
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Write_Eol;
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Write_Str (" old source index = ");
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Write_Int (Int (Xold));
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Write_Eol;
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Write_Str (" old lo = ");
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Write_Int (Int (Factor.Lo));
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Write_Eol;
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Write_Str (" old hi = ");
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Write_Int (Int (Factor.Hi));
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Write_Eol;
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Write_Str (" new lo = ");
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Write_Int (Int (Snew.Source_First));
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Write_Eol;
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Write_Str (" new hi = ");
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Write_Int (Int (Snew.Source_Last));
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Write_Eol;
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Write_Str (" adjustment factor = ");
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Write_Int (Int (Factor.Adjust));
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Write_Eol;
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Write_Str (" instantiation location: ");
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Write_Location (Sloc (Inst_Node));
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Write_Eol;
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end if;
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end;
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end Create_Instantiation_Source;
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----------------------
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-- Load_Config_File --
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----------------------
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function Load_Config_File
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(N : File_Name_Type) return Source_File_Index
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is
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begin
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return Load_File (N, Osint.Config);
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end Load_Config_File;
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--------------------------
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-- Load_Definition_File --
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--------------------------
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function Load_Definition_File
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(N : File_Name_Type) return Source_File_Index
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is
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begin
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return Load_File (N, Osint.Definition);
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end Load_Definition_File;
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---------------
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-- Load_File --
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---------------
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function Load_File
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(N : File_Name_Type;
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T : Osint.File_Type) return Source_File_Index
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is
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FD : File_Descriptor;
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Hi : Source_Ptr;
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Lo : Source_Ptr;
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Src : Source_Buffer_Ptr;
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X : Source_File_Index;
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Preprocessing_Needed : Boolean := False;
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begin
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-- If already there, don't need to reload file. An exception occurs
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-- in multiple unit per file mode. It would be nice in this case to
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-- share the same source file for each unit, but this leads to many
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-- difficulties with assumptions (e.g. in the body of lib), that a
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-- unit can be found by locating its source file index. Since we do
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-- not expect much use of this mode, it's no big deal to waste a bit
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-- of space and time by reading and storing the source multiple times.
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if Multiple_Unit_Index = 0 then
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for J in 1 .. Source_File.Last loop
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if Source_File.Table (J).File_Name = N then
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return J;
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end if;
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end loop;
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end if;
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-- Here we must build a new entry in the file table
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-- But first, we must check if a source needs to be preprocessed,
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-- because we may have to load and parse a definition file, and we want
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-- to do that before we load the source, so that the buffer of the
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-- source will be the last created, and we will be able to replace it
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-- and modify Hi without stepping on another buffer.
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if T = Osint.Source and then not Is_Internal_File_Name (N) then
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Prepare_To_Preprocess
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(Source => N, Preprocessing_Needed => Preprocessing_Needed);
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end if;
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Source_File.Increment_Last;
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X := Source_File.Last;
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if Debug_Flag_L then
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Write_Eol;
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Write_Str ("Sinput.L.Load_File: created source ");
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Write_Int (Int (X));
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Write_Str (" for ");
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Write_Str (Get_Name_String (N));
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end if;
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-- Compute starting index, respecting alignment requirement
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if X = Source_File.First then
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Lo := First_Source_Ptr;
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else
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Lo := ((Source_File.Table (X - 1).Source_Last + Source_Align) /
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Source_Align) * Source_Align;
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end if;
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Osint.Read_Source_File (N, Lo, Hi, Src, FD, T);
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if Null_Source_Buffer_Ptr (Src) then
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Source_File.Decrement_Last;
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if FD = Null_FD then
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return No_Source_File;
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else
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return No_Access_To_Source_File;
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end if;
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else
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if Debug_Flag_L then
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Write_Eol;
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Write_Str ("*** Build source file table entry, Index = ");
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Write_Int (Int (X));
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Write_Str (", file name = ");
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Write_Name (N);
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Write_Eol;
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Write_Str (" lo = ");
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Write_Int (Int (Lo));
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Write_Eol;
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Write_Str (" hi = ");
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Write_Int (Int (Hi));
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Write_Eol;
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Write_Str (" first 10 chars -->");
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declare
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procedure Wchar (C : Character);
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-- Writes character or ? for control character
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-----------
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-- Wchar --
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-----------
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procedure Wchar (C : Character) is
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begin
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if C < ' '
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or else C in ASCII.DEL .. Character'Val (16#9F#)
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then
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Write_Char ('?');
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else
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Write_Char (C);
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end if;
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end Wchar;
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begin
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for J in Lo .. Lo + 9 loop
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Wchar (Src (J));
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end loop;
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Write_Str ("<--");
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Write_Eol;
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Write_Str (" last 10 chars -->");
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for J in Hi - 10 .. Hi - 1 loop
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Wchar (Src (J));
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end loop;
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Write_Str ("<--");
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Write_Eol;
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if Src (Hi) /= EOF then
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Write_Str (" error: no EOF at end");
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Write_Eol;
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end if;
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end;
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end if;
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|
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declare
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S : Source_File_Record renames Source_File.Table (X);
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File_Type : Type_Of_File;
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begin
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case T is
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when Osint.Source =>
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File_Type := Sinput.Src;
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when Osint.Library =>
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raise Program_Error;
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when Osint.Config =>
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File_Type := Sinput.Config;
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when Osint.Definition =>
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File_Type := Def;
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when Osint.Preprocessing_Data =>
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File_Type := Preproc;
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end case;
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S := (Debug_Source_Name => N,
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File_Name => N,
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File_Type => File_Type,
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First_Mapped_Line => No_Line_Number,
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Full_Debug_Name => Osint.Full_Source_Name,
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Full_File_Name => Osint.Full_Source_Name,
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Full_Ref_Name => Osint.Full_Source_Name,
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Instance => No_Instance_Id,
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Identifier_Casing => Unknown,
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Inlined_Call => No_Location,
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Inlined_Body => False,
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Inherited_Pragma => False,
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Keyword_Casing => Unknown,
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Last_Source_Line => 1,
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License => Unknown,
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Lines_Table => null,
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Lines_Table_Max => 1,
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Logical_Lines_Table => null,
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Num_SRef_Pragmas => 0,
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Reference_Name => N,
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Sloc_Adjust => 0,
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Source_Checksum => 0,
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Source_First => Lo,
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Source_Last => Hi,
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Source_Text => Src,
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Template => No_Source_File,
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Unit => No_Unit,
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Time_Stamp => Osint.Current_Source_File_Stamp,
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Index => X);
|
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Alloc_Line_Tables (S, Opt.Table_Factor * Alloc.Lines_Initial);
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S.Lines_Table (1) := Lo;
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end;
|
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|
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-- Preprocess the source if it needs to be preprocessed
|
|
|
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if Preprocessing_Needed then
|
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|
|
-- Temporarily set the Source_File_Index_Table entries for the
|
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-- source, to avoid crash when reporting an error.
|
|
|
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Set_Source_File_Index_Table (X);
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|
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if Opt.List_Preprocessing_Symbols then
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Get_Name_String (N);
|
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|
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declare
|
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Foreword : String (1 .. Foreword_Start'Length +
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|
Name_Len + Foreword_End'Length);
|
|
|
|
begin
|
|
Foreword (1 .. Foreword_Start'Length) := Foreword_Start;
|
|
Foreword (Foreword_Start'Length + 1 ..
|
|
Foreword_Start'Length + Name_Len) :=
|
|
Name_Buffer (1 .. Name_Len);
|
|
Foreword (Foreword'Last - Foreword_End'Length + 1 ..
|
|
Foreword'Last) := Foreword_End;
|
|
Prep.List_Symbols (Foreword);
|
|
end;
|
|
end if;
|
|
|
|
declare
|
|
T : constant Nat := Total_Errors_Detected;
|
|
-- Used to check if there were errors during preprocessing
|
|
|
|
Save_Style_Check : Boolean;
|
|
-- Saved state of the Style_Check flag (which needs to be
|
|
-- temporarily set to False during preprocessing, see below).
|
|
|
|
Modified : Boolean;
|
|
|
|
begin
|
|
-- If this is the first time we preprocess a source, allocate
|
|
-- the preprocessing buffer.
|
|
|
|
if Prep_Buffer = null then
|
|
Prep_Buffer :=
|
|
new Text_Buffer (1 .. Initial_Size_Of_Prep_Buffer);
|
|
end if;
|
|
|
|
-- Make sure the preprocessing buffer is empty
|
|
|
|
Prep_Buffer_Last := 0;
|
|
|
|
-- Initialize the preprocessor hooks
|
|
|
|
Prep.Setup_Hooks
|
|
(Error_Msg => Errout.Error_Msg'Access,
|
|
Scan => Scn.Scanner.Scan'Access,
|
|
Set_Ignore_Errors => Errout.Set_Ignore_Errors'Access,
|
|
Put_Char => Put_Char_In_Prep_Buffer'Access,
|
|
New_EOL => New_EOL_In_Prep_Buffer'Access);
|
|
|
|
-- Initialize scanner and set its behavior for preprocessing,
|
|
-- then preprocess. Also disable style checks, since some of
|
|
-- them are done in the scanner (specifically, those dealing
|
|
-- with line length and line termination), and cannot be done
|
|
-- during preprocessing (because the source file index table
|
|
-- has not been set yet).
|
|
|
|
Scn.Scanner.Initialize_Scanner (X);
|
|
|
|
Scn.Scanner.Set_Special_Character ('#');
|
|
Scn.Scanner.Set_Special_Character ('$');
|
|
Scn.Scanner.Set_End_Of_Line_As_Token (True);
|
|
Save_Style_Check := Opt.Style_Check;
|
|
Opt.Style_Check := False;
|
|
|
|
-- The actual preprocessing step
|
|
|
|
Preprocess (Modified);
|
|
|
|
-- Reset the scanner to its standard behavior, and restore the
|
|
-- Style_Checks flag.
|
|
|
|
Scn.Scanner.Reset_Special_Characters;
|
|
Scn.Scanner.Set_End_Of_Line_As_Token (False);
|
|
Opt.Style_Check := Save_Style_Check;
|
|
|
|
-- If there were errors during preprocessing, record an error
|
|
-- at the start of the file, and do not change the source
|
|
-- buffer.
|
|
|
|
if T /= Total_Errors_Detected then
|
|
Errout.Error_Msg
|
|
("file could not be successfully preprocessed", Lo);
|
|
return No_Source_File;
|
|
|
|
else
|
|
-- Output the result of the preprocessing, if requested and
|
|
-- the source has been modified by the preprocessing. Only
|
|
-- do that for the main unit (spec, body and subunits).
|
|
|
|
if Generate_Processed_File
|
|
and then Modified
|
|
and then
|
|
((Compiler_State = Parsing
|
|
and then Parsing_Main_Extended_Source)
|
|
or else
|
|
(Compiler_State = Analyzing
|
|
and then Analysing_Subunit_Of_Main))
|
|
then
|
|
declare
|
|
FD : File_Descriptor;
|
|
NB : Integer;
|
|
Status : Boolean;
|
|
|
|
begin
|
|
Get_Name_String (N);
|
|
Add_Str_To_Name_Buffer (Prep_Suffix);
|
|
|
|
Delete_File (Name_Buffer (1 .. Name_Len), Status);
|
|
|
|
FD :=
|
|
Create_New_File (Name_Buffer (1 .. Name_Len), Text);
|
|
|
|
Status := FD /= Invalid_FD;
|
|
|
|
if Status then
|
|
NB :=
|
|
Write
|
|
(FD,
|
|
Prep_Buffer (1)'Address,
|
|
Integer (Prep_Buffer_Last));
|
|
Status := NB = Integer (Prep_Buffer_Last);
|
|
end if;
|
|
|
|
if Status then
|
|
Close (FD, Status);
|
|
end if;
|
|
|
|
if not Status then
|
|
Errout.Error_Msg
|
|
("??could not write processed file """ &
|
|
Name_Buffer (1 .. Name_Len) & '"',
|
|
Lo);
|
|
end if;
|
|
end;
|
|
end if;
|
|
|
|
-- Set the new value of Hi
|
|
|
|
Hi := Lo + Source_Ptr (Prep_Buffer_Last);
|
|
|
|
-- Create the new source buffer
|
|
|
|
declare
|
|
Var_Ptr : constant Source_Buffer_Ptr_Var :=
|
|
new Source_Buffer (Lo .. Hi);
|
|
-- Allocate source buffer, allowing extra character at
|
|
-- end for EOF.
|
|
|
|
begin
|
|
Var_Ptr (Lo .. Hi - 1) :=
|
|
Prep_Buffer (1 .. Prep_Buffer_Last);
|
|
Var_Ptr (Hi) := EOF;
|
|
Src := Var_Ptr.all'Access;
|
|
end;
|
|
|
|
-- Record in the table the new source buffer and the
|
|
-- new value of Hi.
|
|
|
|
Source_File.Table (X).Source_Text := Src;
|
|
Source_File.Table (X).Source_Last := Hi;
|
|
|
|
-- Reset Last_Line to 1, because the lines do not
|
|
-- have necessarily the same starts and lengths.
|
|
|
|
Source_File.Table (X).Last_Source_Line := 1;
|
|
end if;
|
|
end;
|
|
end if;
|
|
|
|
Set_Source_File_Index_Table (X);
|
|
return X;
|
|
end if;
|
|
end Load_File;
|
|
|
|
----------------------------------
|
|
-- Load_Preprocessing_Data_File --
|
|
----------------------------------
|
|
|
|
function Load_Preprocessing_Data_File
|
|
(N : File_Name_Type) return Source_File_Index
|
|
is
|
|
begin
|
|
return Load_File (N, Osint.Preprocessing_Data);
|
|
end Load_Preprocessing_Data_File;
|
|
|
|
----------------------
|
|
-- Load_Source_File --
|
|
----------------------
|
|
|
|
function Load_Source_File
|
|
(N : File_Name_Type) return Source_File_Index
|
|
is
|
|
begin
|
|
return Load_File (N, Osint.Source);
|
|
end Load_Source_File;
|
|
|
|
----------------------------
|
|
-- New_EOL_In_Prep_Buffer --
|
|
----------------------------
|
|
|
|
procedure New_EOL_In_Prep_Buffer is
|
|
begin
|
|
Put_Char_In_Prep_Buffer (ASCII.LF);
|
|
end New_EOL_In_Prep_Buffer;
|
|
|
|
-----------------------------
|
|
-- Put_Char_In_Prep_Buffer --
|
|
-----------------------------
|
|
|
|
procedure Put_Char_In_Prep_Buffer (C : Character) is
|
|
begin
|
|
-- If preprocessing buffer is not large enough, double it
|
|
|
|
if Prep_Buffer_Last = Prep_Buffer'Last then
|
|
declare
|
|
New_Prep_Buffer : constant Text_Buffer_Ptr :=
|
|
new Text_Buffer (1 .. 2 * Prep_Buffer_Last);
|
|
|
|
begin
|
|
New_Prep_Buffer (Prep_Buffer'Range) := Prep_Buffer.all;
|
|
Free (Prep_Buffer);
|
|
Prep_Buffer := New_Prep_Buffer;
|
|
end;
|
|
end if;
|
|
|
|
Prep_Buffer_Last := Prep_Buffer_Last + 1;
|
|
Prep_Buffer (Prep_Buffer_Last) := C;
|
|
end Put_Char_In_Prep_Buffer;
|
|
|
|
-------------------------
|
|
-- Source_File_Is_Body --
|
|
-------------------------
|
|
|
|
function Source_File_Is_Body (X : Source_File_Index) return Boolean is
|
|
Pcount : Natural;
|
|
|
|
begin
|
|
Initialize_Scanner (No_Unit, X);
|
|
|
|
-- Loop to look for subprogram or package body
|
|
|
|
loop
|
|
case Token is
|
|
|
|
-- PRAGMA, WITH, USE (which can appear before a body)
|
|
|
|
when Tok_Pragma
|
|
| Tok_Use
|
|
| Tok_With
|
|
=>
|
|
-- We just want to skip any of these, do it by skipping to a
|
|
-- semicolon, but check for EOF, in case we have bad syntax.
|
|
|
|
loop
|
|
if Token = Tok_Semicolon then
|
|
Scan;
|
|
exit;
|
|
elsif Token = Tok_EOF then
|
|
return False;
|
|
else
|
|
Scan;
|
|
end if;
|
|
end loop;
|
|
|
|
-- PACKAGE
|
|
|
|
when Tok_Package =>
|
|
Scan; -- Past PACKAGE
|
|
|
|
-- We have a body if and only if BODY follows
|
|
|
|
return Token = Tok_Body;
|
|
|
|
-- FUNCTION or PROCEDURE
|
|
|
|
when Tok_Function
|
|
| Tok_Procedure
|
|
=>
|
|
Pcount := 0;
|
|
|
|
-- Loop through tokens following PROCEDURE or FUNCTION
|
|
|
|
loop
|
|
Scan;
|
|
|
|
case Token is
|
|
|
|
-- For parens, count paren level (note that paren level
|
|
-- can get greater than 1 if we have default parameters).
|
|
|
|
when Tok_Left_Paren =>
|
|
Pcount := Pcount + 1;
|
|
|
|
when Tok_Right_Paren =>
|
|
Pcount := Pcount - 1;
|
|
|
|
-- EOF means something weird, probably no body
|
|
|
|
when Tok_EOF =>
|
|
return False;
|
|
|
|
-- BEGIN or IS or END definitely means body is present
|
|
|
|
when Tok_Begin
|
|
| Tok_End
|
|
| Tok_Is
|
|
=>
|
|
return True;
|
|
|
|
-- Semicolon means no body present if at outside any
|
|
-- parens. If within parens, ignore, since it could be
|
|
-- a parameter separator.
|
|
|
|
when Tok_Semicolon =>
|
|
if Pcount = 0 then
|
|
return False;
|
|
end if;
|
|
|
|
-- Skip anything else
|
|
|
|
when others =>
|
|
null;
|
|
end case;
|
|
end loop;
|
|
|
|
-- Anything else in main scan means we don't have a body
|
|
|
|
when others =>
|
|
return False;
|
|
end case;
|
|
end loop;
|
|
end Source_File_Is_Body;
|
|
|
|
----------------------------
|
|
-- Source_File_Is_No_Body --
|
|
----------------------------
|
|
|
|
function Source_File_Is_No_Body (X : Source_File_Index) return Boolean is
|
|
begin
|
|
Initialize_Scanner (No_Unit, X);
|
|
|
|
if Token /= Tok_Pragma then
|
|
return False;
|
|
end if;
|
|
|
|
Scan; -- past pragma
|
|
|
|
if Token /= Tok_Identifier
|
|
or else Chars (Token_Node) /= Name_No_Body
|
|
then
|
|
return False;
|
|
end if;
|
|
|
|
Scan; -- past No_Body
|
|
|
|
if Token /= Tok_Semicolon then
|
|
return False;
|
|
end if;
|
|
|
|
Scan; -- past semicolon
|
|
|
|
return Token = Tok_EOF;
|
|
end Source_File_Is_No_Body;
|
|
|
|
end Sinput.L;
|