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-- Semantic analysis pass.
-- Copyright (C) 2002, 2003, 2004, 2005 Tristan Gingold
--
-- GHDL 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 2, or (at your option) any later
-- version.
--
-- GHDL 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 GCC; see the file COPYING. If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-- 02111-1307, USA.
with Iirs; use Iirs;
with Types; use Types;
package Sem is
-- Semantic analysis for chapters 1, 2, 10 (uses clauses) and 11.
-- Do the semantic analysis of design unit DESIGN_UNIT.
-- Also add a few node or change some nodes, when for exemple an
-- identifier is changed into an access to the type.
procedure Semantic (Design_Unit: Iir_Design_Unit);
-- Get the current design unit, ie, the parameter of the procedure semantic.
function Get_Current_Design_Unit return Iir_Design_Unit;
-- Makes the current design unit depends on UNIT.
-- UNIT must be either an entit_aspect or a design_unit.
procedure Add_Dependence (Unit : Iir);
-- Add EL in the current design unit list of items to be checked later.
procedure Add_Analysis_Checks_List (El : Iir);
-- INTER_PARENT contains generics and ports interfaces;
-- ASSOC_PARENT constains generics and ports map aspects.
procedure Sem_Generic_Port_Association_Chain
(Inter_Parent : Iir; Assoc_Parent : Iir);
-- Return TRUE iff the actual of ASSOC can be the formal FORMAL.
-- ASSOC must be an association_element_by_expression.
function Can_Collapse_Signals (Assoc : Iir; Formal : Iir) return Boolean;
-- Return TRUE iff LEFT and RIGHT are (in depth) equal.
-- This corresponds to conformance rules, LRM 2.7
function Are_Trees_Equal (Left, Right : Iir) return Boolean;
-- Check requirements on number of interfaces for subprogram specification
-- SUBPRG for a symbol operator ID. Requirements only concern operators,
-- and are defined in LRM 2.3.1.
-- If ID is not an operator name, this subprogram does no checks.
-- ID might be different from the identifier of SUBPRG when non object
-- aliases are checked.
procedure Check_Operator_Requirements (Id : Name_Id; Subprg : Iir);
-- Semantize an use clause.
-- This may adds use clauses to the chain.
procedure Sem_Use_Clause (Clauses : Iir_Use_Clause);
-- Compute and set the hash profile of a subprogram or enumeration clause.
procedure Compute_Subprogram_Hash (Subprg : Iir);
-- LRM 2.1 Subprogram Declarations.
-- SUBPRG is either a _specification or a _spec_body.
function Sem_Subprogram_Declaration (Subprg: Iir) return Iir;
-- LRM 2.2 Subprogram Bodies.
procedure Sem_Subprogram_Body (Subprg: Iir);
-- Do late analysis checks (pure rules).
procedure Sem_Analysis_Checks_List (Unit : Iir_Design_Unit;
Emit_Warnings : Boolean);
end Sem;
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