path: root/gcc/m2/gm2-compiler/P1SymBuild.def

(* P1SymBuild.def pass 1 symbol creation.

Copyright (C) 2001-2022 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.

This file is part of GNU Modula-2.

GNU Modula-2 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.

GNU Modula-2 is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Modula-2; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  *)

DEFINITION MODULE P1SymBuild ;

(*
   Title      : P1SymBuild
   Author     : Gaius Mulley
   Date       : 24/6/87
   LastEdit   : Sat Dec  9 11:34:34 EST 1989
   System     : UNIX (GNU Modula-2)
   Description: Builds symbol entities, types, constants, variables,
                procedures, modules and scopes.
                All procedures are only called during Pass 1.
*)

EXPORT QUALIFIED P1StartBuildDefinitionModule,
                 P1EndBuildDefinitionModule,
                 P1StartBuildImplementationModule,
                 P1EndBuildImplementationModule,
                 P1StartBuildProgramModule,
                 P1EndBuildProgramModule,
                 StartBuildInnerModule,
                 EndBuildInnerModule,
                 BuildImportOuterModule,
                 BuildExportOuterModule,
                 BuildImportInnerModule,
                 BuildExportInnerModule,
                 StartBuildEnumeration,
                 EndBuildEnumeration,
                 BuildHiddenType,
                 StartBuildProcedure,
                 EndBuildProcedure,
                 BuildProcedureHeading,
                 BuildNulName,
                 BuildTypeEnd,
                 CheckExplicitExported,
                 BuildImportStatement,
                 AddImportToImportStatement ;


(*
   StartBuildDefinitionModule - Creates a definition module and starts
                                a new scope.

                                The Stack is expected:

                                Entry                 Exit

                         Ptr ->
                                +------------+
                                | NameStart  |                       <- Ptr
                                |------------|        +------------+
                                | NulName/"C"|        | NameStart  |
                                |------------|        |------------|
*)

PROCEDURE P1StartBuildDefinitionModule ;


(*
   EndBuildDefinitionModule - Destroys the definition module scope and
                              checks for correct name.

                              The Stack is expected:

                              Entry                 Exit

                       Ptr ->
                              +------------+        +-----------+
                              | NameEnd    |        |           |
                              |------------|        |-----------|
                              | NameStart  |        |           | <- Ptr
                              |------------|        |-----------|
*)

PROCEDURE P1EndBuildDefinitionModule ;


(*
   StartBuildImplementationModule - Creates an implementation module and starts
                                    a new scope.

                                    The Stack is expected:

                                    Entry                 Exit

                             Ptr ->                                     <- Ptr
                                    +------------+        +-----------+
                                    | NameStart  |        | NameStart |
                                    |------------|        |-----------|

*)

PROCEDURE P1StartBuildImplementationModule ;


(*
   EndBuildImplementationModule - Destroys the implementation module scope and
                                  checks for correct name.

                                  The Stack is expected:

                                  Entry                 Exit

                           Ptr ->
                                  +------------+        +-----------+
                                  | NameEnd    |        |           |
                                  |------------|        |-----------|
                                  | NameStart  |        |           | <- Ptr
                                  |------------|        |-----------|
*)

PROCEDURE P1EndBuildImplementationModule ;


(*
   StartBuildProgramModule - Creates a program module and starts
                             a new scope.

                             The Stack is expected:

                             Entry                 Exit

                      Ptr ->                                     <- Ptr
                             +------------+        +-----------+
                             | NameStart  |        | NameStart |
                             |------------|        |-----------|

*)

PROCEDURE P1StartBuildProgramModule ;


(*
   EndBuildProgramModule - Destroys the program module scope and
                           checks for correct name.

                           The Stack is expected:

                           Entry                 Exit

                    Ptr ->
                           +------------+        +-----------+
                           | NameEnd    |        |           |
                           |------------|        |-----------|
                           | NameStart  |        |           | <- Ptr
                           |------------|        |-----------|
*)

PROCEDURE P1EndBuildProgramModule ;


(*
   StartBuildInnerModule - Creates an Inner module and starts
                           a new scope.

                           The Stack is expected:

                           Entry                 Exit

                    Ptr ->                                     <- Ptr
                           +------------+        +-----------+
                           | NameStart  |        | NameStart |
                           |------------|        |-----------|

*)

PROCEDURE StartBuildInnerModule ;


(*
   EndBuildInnermModule - Destroys the Inner module scope and
                          checks for correct name.

                          The Stack is expected:

                          Entry                 Exit

                   Ptr ->
                          +------------+        +-----------+
                          | NameEnd    |        |           |
                          |------------|        |-----------|
                          | NameStart  |        |           | <- Ptr
                          |------------|        |-----------|
*)

PROCEDURE EndBuildInnerModule ;


(*
   BuildImportOuterModule - Builds imported identifiers into an outer module
                            from a definition module.

                            The Stack is expected:

                            Entry           OR    Entry

                     Ptr ->                Ptr ->
                            +------------+        +-----------+
                            | #          |        | #         |
                            |------------|        |-----------|
                            | Id1        |        | Id1       |
                            |------------|        |-----------|
                            .            .        .           .
                            .            .        .           .
                            .            .        .           .
                            |------------|        |-----------|
                            | Id#        |        | Id#       |
                            |------------|        |-----------|
                            | ImportTok  |        | Ident     |
                            |------------|        |-----------|

                            IMPORT Id1, .. Id# ;  FROM Ident IMPORT Id1 .. Id# ;


                                                  Error Condition
                            Exit

                            All above stack discarded
*)

PROCEDURE BuildImportOuterModule (definition: BOOLEAN) ;


(*
   BuildExportOuterModule - Builds exported identifiers from an outer module
                            to the outside world of library modules.

                            The Stack is expected:

                            Entry           OR    Entry

                     Ptr ->                Ptr ->
                            +------------+        +--------------+
                            | #          |        | #            |
                            |------------|        |--------------|
                            | Id1        |        | Id1          |
                            |------------|        |--------------|
                            .            .        .              .
                            .            .        .              .
                            .            .        .              .
                            |------------|        |--------------|
                            | Id#        |        | Id#          |
                            |------------|        |--------------|
                            | ExportTok  |        | QualifiedTok |
                            |------------|        |--------------|

                            EXPORT Id1, .. Id# ;  EXPORT QUALIFIED Id1 .. Id# ;

                            Error Condition


                            Exit

                            All above stack discarded
*)

PROCEDURE BuildExportOuterModule ;


(*
   CheckExplicitExported - checks to see whether we are compiling
                           a definition module and whether the ident
                           is implicitly export qualified or unqualified.


                           The Stack is expected:

                           Entry                 Exit

                    Ptr ->                Ptr ->
                           +------------+        +-----------+
                           | Identname  |        | Identname |
                           |------------|        |-----------|

*)

PROCEDURE CheckExplicitExported ;


(*
   BuildImportInnerModule - Builds imported identifiers into an inner module
                            from the last level of module.

                            The Stack is expected:

                            Entry           OR    Entry

                     Ptr ->                Ptr ->
                            +------------+        +-----------+
                            | #          |        | #         |
                            |------------|        |-----------|
                            | Id1        |        | Id1       |
                            |------------|        |-----------|
                            .            .        .           .
                            .            .        .           .
                            .            .        .           .
                            |------------|        |-----------|
                            | Id#        |        | Id#       |
                            |------------|        |-----------|
                            | ImportTok  |        | Ident     |
                            |------------|        |-----------|

                            IMPORT Id1, .. Id# ;  FROM Ident IMPORT Id1 .. Id# ;


                                                  Error Condition
                            Exit

                            All above stack discarded
*)

PROCEDURE BuildImportInnerModule ;


(*
   BuildExportInnerModule - Builds exported identifiers from an inner module
                            to the next layer module.

                            The Stack is expected:

                            Entry           OR    Entry

                     Ptr ->                Ptr ->
                            +------------+        +--------------+
                            | #          |        | #            |
                            |------------|        |--------------|
                            | Id1        |        | Id1          |
                            |------------|        |--------------|
                            .            .        .              .
                            .            .        .              .
                            .            .        .              .
                            |------------|        |--------------|
                            | Id#        |        | Id#          |
                            |------------|        |--------------|
                            | ExportTok  |        | QualifiedTok |
                            |------------|        |--------------|

                            EXPORT Id1, .. Id# ;  EXPORT QUALIFIED Id1 .. Id# ;


                            Exit

                            All above stack discarded
*)

PROCEDURE BuildExportInnerModule ;


(*
   StartBuildEnumeration - Builds an Enumeration type Type.


                           Stack

                           Entry                 Exit

                    Ptr ->
                           +------------+
                           | #          |
                           |------------|
                           | en 1       |
                           |------------|
                           | en 2       |
                           |------------|
                           .            .
                           .            .
                           .            .                       <- Ptr
                           |------------|        +------------+
                           | en #       |        | Type       |
                           |------------|        |------------|
                           | Name       |        | Name       |
                           |------------|        |------------|
*)

PROCEDURE StartBuildEnumeration ;


(*
   EndBuildEnumeration - completes the construction of the enumeration type.


                         Stack

                         Entry                 Exit

                  Ptr ->
                         +------------+
                         | Type       |                          <- Ptr
                         |------------|        +---------------+
                         | Name       |        | Type  | Name  |
                         |------------|        |---------------|

                                               Empty
*)

PROCEDURE EndBuildEnumeration ;


(*
   BuildHiddenType - Builds a Hidden Type.


                     Stack

                     Entry                 Exit

              Ptr ->
                     +------------+
                     | Name       |                          <- Ptr
                     |------------|        Empty
*)

PROCEDURE BuildHiddenType ;


(*
   StartBuildProcedure - Builds a Procedure.

                         The Stack:

                         Entry                 Exit

                                                              <- Ptr
                                               +------------+
                  Ptr ->                       | ProcSym    |
                         +------------+        |------------|
                         | Name       |        | Name       |
                         |------------|        |------------|
*)

PROCEDURE StartBuildProcedure ;


(*
   EndBuildProcedure - Ends building a Procedure.
                       It checks the start procedure name matches the end
                       procedure name.

                       The Stack:


                       Entry                 Exit

                Ptr ->
                       +------------+
                       | NameEnd    |
                       |------------|
                       | ProcSym    |
                       |------------|
                       | NameStart  |
                       |------------|
                                             Empty
*)

PROCEDURE EndBuildProcedure ;


(*
   BuildProcedureHeading - Builds a procedure heading for the definition
                           module procedures.

                           Operation only performed if compiling a
                           definition module.

                           The Stack:

                           Entry                       Exit

                    Ptr ->
                           +------------+
                           | ProcSym    |              Empty
                           |------------|

*)

PROCEDURE BuildProcedureHeading ;


(*
   BuildNulName - Pushes a NulKey onto the top of the stack.
                  The Stack:


                  Entry                    Exit

                                                          <- Ptr
                  Empty                    +------------+
                                           | NulKey     |
                                           |------------|
*)

PROCEDURE BuildNulName ;


(*
   BuildTypeEnd - Pops the type Type and Name.
                  The Stack:


                  Entry                    Exit


           Ptr ->
                  +-------------+
                  | Type | Name |          Empty
                  |-------------|
*)

PROCEDURE BuildTypeEnd ;


(*
   BuildImportStatement - create a new import statement in the current module.
                          It ignores local modules.

                          The quadruple stack is not used.
*)

PROCEDURE BuildImportStatement (tok: CARDINAL) ;


(*
   AddImportToImportStatement - the top of stack is expected to be a module name.
                                This is looked up from the module universe and
                                wrapped in an import symbol and placed into the
                                current import statement.

                                The quadruple stack is unchanged.

                                Entry                      Exit


                         Ptr ->                                                   <- Ptr
                                +---------------------+   +---------------------+
                                | ImportedModuleName  |   | ImportedModuleName  |
                                |---------------------|   |---------------------|
*)

PROCEDURE AddImportToImportStatement (qualified: BOOLEAN) ;


END P1SymBuild.