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195 | -- Show various things related to Minimal_Actions for a grammar.
with Ada.Calendar;
with Ada.Command_Line;
with Ada.Exceptions;
with Ada.Strings.Unbounded;
with Ada.Text_IO; use Ada.Text_IO;
with GNAT.Traceback.Symbolic;
with WisiToken.BNF.Generate_Utils;
with WisiToken.Generate.LR.LALR_Generate;
with WisiToken.Generate.LR.LR1_Generate;
with WisiToken.Generate.LR1_Items;
with WisiToken.Parse.LR.Parser_No_Recover;
with WisiToken.Syntax_Trees;
with WisiToken.Text_IO_Trace;
with WisiToken_Grammar_Runtime;
with Wisitoken_Grammar_Actions;
with Wisitoken_Grammar_Main;
procedure Show_Minimal_Actions
is
use all type Ada.Calendar.Time;
use WisiToken;
use WisiToken.Generate.LR;
procedure Put_Usage
is
begin
Put_Line ("show_minimal_actions {grammar_file} {LALR | LR1} {trace_generate}");
end Put_Usage;
Input_File_Name : Ada.Strings.Unbounded.Unbounded_String;
Gen_Alg : WisiToken.BNF.Generate_Algorithm;
Trace_Generate : Integer;
Trace : aliased WisiToken.Text_IO_Trace.Trace (Wisitoken_Grammar_Actions.Descriptor'Access);
Input_Data : aliased WisiToken_Grammar_Runtime.User_Data_Type;
Grammar_Parser : WisiToken.Parse.LR.Parser_No_Recover.Parser;
Time : Ada.Calendar.Time;
begin
declare
use Ada.Command_Line;
begin
if Argument_Count = 3 then
Input_File_Name := +Argument (1);
Gen_Alg := WisiToken.BNF.Generate_Algorithm'Value (Argument (2));
Trace_Generate := Integer'Value (Argument (3));
else
Put_Usage;
return;
end if;
exception
when Constraint_Error =>
Put_Usage;
return;
end;
WisiToken.Trace_Generate := 0; -- Only trace the part we are interested in.
Wisitoken_Grammar_Main.Create_Parser (Grammar_Parser, Trace'Unchecked_Access, Input_Data'Unchecked_Access);
begin
Grammar_Parser.Lexer.Reset_With_File (-Input_File_Name);
Grammar_Parser.Parse;
Input_Data.Phase := WisiToken_Grammar_Runtime.Meta;
Input_Data.User_Parser := Gen_Alg;
Input_Data.User_Lexer := WisiToken.BNF.re2c_Lexer;
Grammar_Parser.Execute_Actions;
case Input_Data.Meta_Syntax is
when WisiToken_Grammar_Runtime.Unknown =>
Input_Data.Meta_Syntax := WisiToken_Grammar_Runtime.BNF_Syntax;
when WisiToken_Grammar_Runtime.BNF_Syntax =>
null;
when WisiToken_Grammar_Runtime.EBNF_Syntax =>
declare
Tree : WisiToken.Syntax_Trees.Tree renames Grammar_Parser.Parsers.First_State_Ref.Tree;
begin
WisiToken_Grammar_Runtime.Translate_EBNF_To_BNF (Tree, Input_Data);
if WisiToken.Generate.Error then
raise WisiToken.Grammar_Error with "errors during translating EBNF to BNF: aborting";
end if;
end;
end case;
Input_Data.Phase := WisiToken_Grammar_Runtime.Other;
Grammar_Parser.Execute_Actions;
exception
when Syntax_Error =>
Grammar_Parser.Put_Errors;
return;
end;
Time := Ada.Calendar.Clock;
declare
Generate_Data : constant WisiToken.BNF.Generate_Utils.Generate_Data :=
WisiToken.BNF.Generate_Utils.Initialize (Input_Data);
Descriptor : WisiToken.Descriptor renames Generate_Data.Descriptor.all;
Has_Empty_Production : constant Token_ID_Set := Generate.Has_Empty_Production (Generate_Data.Grammar);
First_Nonterm_Set : constant Token_Array_Token_Set := Generate.First
(Generate_Data.Grammar, Has_Empty_Production, Generate_Data.Descriptor.First_Terminal);
First_Terminal_Sequence : constant Token_Sequence_Arrays.Vector :=
WisiToken.Generate.To_Terminal_Sequence_Array (First_Nonterm_Set, Descriptor);
Item_Sets : Generate.LR1_Items.Item_Set_List :=
(case Gen_Alg is
when WisiToken.BNF.LALR =>
Generate.LR.LALR_Generate.LALR_Kernels
(Generate_Data.Grammar, First_Nonterm_Set, Descriptor),
when WisiToken.BNF.LR1 =>
Generate.LR.LR1_Generate.LR1_Item_Sets
(Has_Empty_Production, First_Terminal_Sequence, Generate_Data.Grammar, Descriptor),
when others => raise WisiToken.User_Error);
Conflict_Counts : Conflict_Count_Lists.List;
Unknown_Conflicts : Generate.LR.Conflict_Lists.List;
Table : Parse.LR.Parse_Table
(State_First => Item_Sets.First_Index,
State_Last => Item_Sets.Last_Index,
First_Terminal => Generate_Data.Descriptor.First_Terminal,
Last_Terminal => Generate_Data.Descriptor.Last_Terminal,
First_Nonterminal => Generate_Data.Descriptor.First_Nonterminal,
Last_Nonterminal => Generate_Data.Descriptor.Last_Nonterminal);
Recursions : WisiToken.Generate.Recursions;
begin
case Gen_Alg is
when WisiToken.BNF.LALR =>
Generate.LR.LALR_Generate.Fill_In_Lookaheads
(Generate_Data.Grammar, Has_Empty_Production, First_Terminal_Sequence, Item_Sets,
Descriptor);
Generate.LR.LALR_Generate.Add_Actions
(Item_Sets, Generate_Data.Grammar, Has_Empty_Production, First_Nonterm_Set, First_Terminal_Sequence,
Conflict_Counts, Unknown_Conflicts, Table, Descriptor);
when WisiToken.BNF.LR1 =>
Generate.LR.LR1_Generate.Add_Actions
(Item_Sets, Generate_Data.Grammar, Has_Empty_Production, First_Nonterm_Set, Conflict_Counts,
Unknown_Conflicts, Table, Descriptor);
when others =>
raise WisiToken.User_Error;
end case;
if Trace_Generate > Outline then
Put_Line ("time grammar generate:" & Duration'Image (Ada.Calendar.Clock - Time));
end if;
WisiToken.Trace_Generate := Trace_Generate; -- Only trace the part we are interested in.
Time := Ada.Calendar.Clock;
Recursions :=
(if Input_Data.Language_Params.Partial_Recursion
then WisiToken.Generate.Compute_Partial_Recursion (Generate_Data.Grammar)
else WisiToken.Generate.Compute_Full_Recursion (Generate_Data.Grammar));
if Trace_Generate > Outline then
Put_Line ("time grammar recursions:" & Duration'Image (Ada.Calendar.Clock - Time));
Put_Line (Recursions.Recursions.Length'Image & " recursions");
end if;
-- declare
-- Minimal_Terminal_Sequences : constant Minimal_Sequence_Array :=
-- Generate.LR.Compute_Minimal_Terminal_Sequences (Descriptor, Generate_Data.Grammar, Recursions);
-- Minimal_Terminal_First : constant WisiToken.Token_Array_Token_ID :=
-- Generate.LR.Compute_Minimal_Terminal_First (Descriptor, Minimal_Terminal_Sequences);
-- begin
-- for State in Table.States'Range loop
-- if Trace_Generate > Extra then
-- Ada.Text_IO.Put_Line ("Set_Minimal_Complete_Actions:" & State_Index'Image (State));
-- end if;
-- Set_Minimal_Complete_Actions
-- (Table.States (State),
-- (case Gen_Alg is
-- when WisiToken.BNF.LALR =>
-- Item_Sets (State),
-- when WisiToken.BNF.LR1 =>
-- WisiToken.Generate.LR1_Items.Filter
-- (Item_Sets (State), Generate_Data.Grammar, Descriptor,
-- WisiToken.Generate.LR1_Items.In_Kernel'Access),
-- when others => raise WisiToken.User_Error),
-- Descriptor, Generate_Data.Grammar, Minimal_Terminal_Sequences, Minimal_Terminal_First);
-- end loop;
-- New_Line;
-- end;
end;
exception
when E : others =>
Put_Line (Ada.Exceptions.Exception_Name (E) & ": " & Ada.Exceptions.Exception_Message (E));
Put_Line (GNAT.Traceback.Symbolic.Symbolic_Traceback (E));
end Show_Minimal_Actions;
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