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|
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S T A N D --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2015, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- 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/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- This package contains the declarations of entities in package Standard,
-- These values are initialized either by calling CStand.Create_Standard,
-- or by calling Stand.Tree_Read.
with Types; use Types;
package Stand is
-- Warning: the entities defined in this package are written out by the
-- Tree_Write routine, and read back in by the Tree_Read routine, so be
-- sure to modify these two routines if you add entities that are not
-- part of Standard_Entity.
type Standard_Entity_Type is (
-- This enumeration type contains an entry for each name in Standard
-- Package names
S_Standard,
S_ASCII,
-- Types and subtypes defined in package Standard (in the order in which
-- they appear in the RM, so that the declarations are in the right
-- order for the purposes of ASIS traversals
S_Boolean,
S_Short_Short_Integer,
S_Short_Integer,
S_Integer,
S_Long_Integer,
S_Long_Long_Integer,
S_Natural,
S_Positive,
S_Short_Float,
S_Float,
S_Long_Float,
S_Long_Long_Float,
S_Character,
S_Wide_Character,
S_Wide_Wide_Character,
S_String,
S_Wide_String,
S_Wide_Wide_String,
S_Duration,
-- Enumeration literals for type Boolean
S_False,
S_True,
-- Exceptions declared in package Standard
S_Constraint_Error,
S_Numeric_Error,
S_Program_Error,
S_Storage_Error,
S_Tasking_Error,
-- Binary Operators declared in package Standard
S_Op_Add,
S_Op_And,
S_Op_Concat,
S_Op_Concatw,
S_Op_Concatww,
S_Op_Divide,
S_Op_Eq,
S_Op_Expon,
S_Op_Ge,
S_Op_Gt,
S_Op_Le,
S_Op_Lt,
S_Op_Mod,
S_Op_Multiply,
S_Op_Ne,
S_Op_Or,
S_Op_Rem,
S_Op_Subtract,
S_Op_Xor,
-- Unary operators declared in package Standard
S_Op_Abs,
S_Op_Minus,
S_Op_Not,
S_Op_Plus,
-- Constants defined in package ASCII (with value in hex).
-- First the thirty-two C0 control characters)
S_NUL, -- 16#00#
S_SOH, -- 16#01#
S_STX, -- 16#02#
S_ETX, -- 16#03#
S_EOT, -- 16#04#
S_ENQ, -- 16#05#
S_ACK, -- 16#06#
S_BEL, -- 16#07#
S_BS, -- 16#08#
S_HT, -- 16#09#
S_LF, -- 16#0A#
S_VT, -- 16#0B#
S_FF, -- 16#0C#
S_CR, -- 16#0D#
S_SO, -- 16#0E#
S_SI, -- 16#0F#
S_DLE, -- 16#10#
S_DC1, -- 16#11#
S_DC2, -- 16#12#
S_DC3, -- 16#13#
S_DC4, -- 16#14#
S_NAK, -- 16#15#
S_SYN, -- 16#16#
S_ETB, -- 16#17#
S_CAN, -- 16#18#
S_EM, -- 16#19#
S_SUB, -- 16#1A#
S_ESC, -- 16#1B#
S_FS, -- 16#1C#
S_GS, -- 16#1D#
S_RS, -- 16#1E#
S_US, -- 16#1F#
-- Here are the ones for Colonel Whitaker's O26 keypunch
S_Exclam, -- 16#21#
S_Quotation, -- 16#22#
S_Sharp, -- 16#23#
S_Dollar, -- 16#24#
S_Percent, -- 16#25#
S_Ampersand, -- 16#26#
S_Colon, -- 16#3A#
S_Semicolon, -- 16#3B#
S_Query, -- 16#3F#
S_At_Sign, -- 16#40#
S_L_Bracket, -- 16#5B#
S_Back_Slash, -- 16#5C#
S_R_Bracket, -- 16#5D#
S_Circumflex, -- 16#5E#
S_Underline, -- 16#5F#
S_Grave, -- 16#60#
S_LC_A, -- 16#61#
S_LC_B, -- 16#62#
S_LC_C, -- 16#63#
S_LC_D, -- 16#64#
S_LC_E, -- 16#65#
S_LC_F, -- 16#66#
S_LC_G, -- 16#67#
S_LC_H, -- 16#68#
S_LC_I, -- 16#69#
S_LC_J, -- 16#6A#
S_LC_K, -- 16#6B#
S_LC_L, -- 16#6C#
S_LC_M, -- 16#6D#
S_LC_N, -- 16#6E#
S_LC_O, -- 16#6F#
S_LC_P, -- 16#70#
S_LC_Q, -- 16#71#
S_LC_R, -- 16#72#
S_LC_S, -- 16#73#
S_LC_T, -- 16#74#
S_LC_U, -- 16#75#
S_LC_V, -- 16#76#
S_LC_W, -- 16#77#
S_LC_X, -- 16#78#
S_LC_Y, -- 16#79#
S_LC_Z, -- 16#7A#
S_L_BRACE, -- 16#7B#
S_BAR, -- 16#7C#
S_R_BRACE, -- 16#7D#
S_TILDE, -- 16#7E#
-- And one more control character, all on its own
S_DEL); -- 16#7F#
subtype S_Types is
Standard_Entity_Type range S_Boolean .. S_Duration;
subtype S_Exceptions is
Standard_Entity_Type range S_Constraint_Error .. S_Tasking_Error;
subtype S_ASCII_Names is
Standard_Entity_Type range S_NUL .. S_DEL;
subtype S_Binary_Ops is
Standard_Entity_Type range S_Op_Add .. S_Op_Xor;
subtype S_Unary_Ops is
Standard_Entity_Type range S_Op_Abs .. S_Op_Plus;
type Standard_Entity_Array_Type is array (Standard_Entity_Type) of Node_Id;
Standard_Entity : Standard_Entity_Array_Type;
-- This array contains pointers to the Defining Identifier nodes for each
-- of the visible entities defined in Standard_Entities_Type. The array is
-- initialized by the Create_Standard procedure.
Standard_Package_Node : Node_Id;
-- Points to the N_Package_Declaration node for standard. Also
-- initialized by the Create_Standard procedure.
-- The following Entities are the pointers to the Defining Identifier
-- nodes for some visible entities defined in Standard_Entities_Type.
SE : Standard_Entity_Array_Type renames Standard_Entity;
Standard_Standard : Entity_Id renames SE (S_Standard);
Standard_ASCII : Entity_Id renames SE (S_ASCII);
Standard_Character : Entity_Id renames SE (S_Character);
Standard_Wide_Character : Entity_Id renames SE (S_Wide_Character);
Standard_Wide_Wide_Character : Entity_Id renames SE (S_Wide_Wide_Character);
Standard_String : Entity_Id renames SE (S_String);
Standard_Wide_String : Entity_Id renames SE (S_Wide_String);
Standard_Wide_Wide_String : Entity_Id renames SE (S_Wide_Wide_String);
Standard_Boolean : Entity_Id renames SE (S_Boolean);
Standard_False : Entity_Id renames SE (S_False);
Standard_True : Entity_Id renames SE (S_True);
Standard_Duration : Entity_Id renames SE (S_Duration);
Standard_Natural : Entity_Id renames SE (S_Natural);
Standard_Positive : Entity_Id renames SE (S_Positive);
Standard_Constraint_Error : Entity_Id renames SE (S_Constraint_Error);
Standard_Numeric_Error : Entity_Id renames SE (S_Numeric_Error);
Standard_Program_Error : Entity_Id renames SE (S_Program_Error);
Standard_Storage_Error : Entity_Id renames SE (S_Storage_Error);
Standard_Tasking_Error : Entity_Id renames SE (S_Tasking_Error);
Standard_Short_Float : Entity_Id renames SE (S_Short_Float);
Standard_Float : Entity_Id renames SE (S_Float);
Standard_Long_Float : Entity_Id renames SE (S_Long_Float);
Standard_Long_Long_Float : Entity_Id renames SE (S_Long_Long_Float);
Standard_Short_Short_Integer : Entity_Id renames SE (S_Short_Short_Integer);
Standard_Short_Integer : Entity_Id renames SE (S_Short_Integer);
Standard_Integer : Entity_Id renames SE (S_Integer);
Standard_Long_Integer : Entity_Id renames SE (S_Long_Integer);
Standard_Long_Long_Integer : Entity_Id renames SE (S_Long_Long_Integer);
Standard_Op_Add : Entity_Id renames SE (S_Op_Add);
Standard_Op_And : Entity_Id renames SE (S_Op_And);
Standard_Op_Concat : Entity_Id renames SE (S_Op_Concat);
Standard_Op_Concatw : Entity_Id renames SE (S_Op_Concatw);
Standard_Op_Concatww : Entity_Id renames SE (S_Op_Concatww);
Standard_Op_Divide : Entity_Id renames SE (S_Op_Divide);
Standard_Op_Eq : Entity_Id renames SE (S_Op_Eq);
Standard_Op_Expon : Entity_Id renames SE (S_Op_Expon);
Standard_Op_Ge : Entity_Id renames SE (S_Op_Ge);
Standard_Op_Gt : Entity_Id renames SE (S_Op_Gt);
Standard_Op_Le : Entity_Id renames SE (S_Op_Le);
Standard_Op_Lt : Entity_Id renames SE (S_Op_Lt);
Standard_Op_Mod : Entity_Id renames SE (S_Op_Mod);
Standard_Op_Multiply : Entity_Id renames SE (S_Op_Multiply);
Standard_Op_Ne : Entity_Id renames SE (S_Op_Ne);
Standard_Op_Or : Entity_Id renames SE (S_Op_Or);
Standard_Op_Rem : Entity_Id renames SE (S_Op_Rem);
Standard_Op_Subtract : Entity_Id renames SE (S_Op_Subtract);
Standard_Op_Xor : Entity_Id renames SE (S_Op_Xor);
Standard_Op_Abs : Entity_Id renames SE (S_Op_Abs);
Standard_Op_Minus : Entity_Id renames SE (S_Op_Minus);
Standard_Op_Not : Entity_Id renames SE (S_Op_Not);
Standard_Op_Plus : Entity_Id renames SE (S_Op_Plus);
Last_Standard_Node_Id : Node_Id;
-- Highest Node_Id value used by Standard
Last_Standard_List_Id : List_Id;
-- Highest List_Id value used by Standard (including those used by
-- normal list headers, element list headers, and list elements)
Boolean_Literals : array (Boolean) of Entity_Id;
-- Entities for the two boolean literals, used by the expander
-------------------------------------
-- Semantic Phase Special Entities --
-------------------------------------
-- The semantic phase needs a number of entities for internal processing
-- that are logically at the level of Standard, and hence defined in this
-- package. However, they are never visible to a program, and are not
-- chained on to the Decls list of Standard. The names of all these
-- types are relevant only in certain debugging and error message
-- situations. They have names that are suitable for use in such
-- error messages (see body for actual names used).
Standard_Void_Type : Entity_Id;
-- This is a type used to represent the return type of procedures
Standard_Exception_Type : Entity_Id;
-- This is a type used to represent the Etype of exceptions
Standard_A_String : Entity_Id;
-- An access to String type used for building elements of tables
-- carrying the enumeration literal names.
Standard_A_Char : Entity_Id;
-- Access to character, used as a component of the exception type to denote
-- a thin pointer component.
Standard_Debug_Renaming_Type : Entity_Id;
-- A zero-size subtype of Integer, used as the type of variables used to
-- provide the debugger with name encodings for renaming declarations.
Predefined_Float_Types : Elist_Id;
-- Entities for predefined floating point types. These are used by
-- the semantic phase to select appropriate types for floating point
-- declarations. This list is ordered by preference. All types up to
-- Long_Long_Float_Type are considered for plain "digits N" declarations,
-- while selection of later types requires a range specification and
-- possibly other attributes or pragmas.
-- The entities labeled Any_xxx are used in situations where the full
-- characteristics of an entity are not yet known, e.g. Any_Character
-- is used to label a character literal before resolution is complete.
-- These entities are also used to construct appropriate references in
-- error messages ("expecting an integer type").
Any_Id : Entity_Id;
-- Used to represent some unknown identifier. Used to label undefined
-- identifier references to prevent cascaded errors.
Any_Type : Entity_Id;
-- Used to represent some unknown type. Any_Type is the type of an
-- unresolved operator, and it is the type of a node where a type error
-- has been detected. Any_Type plays an important role in avoiding cascaded
-- errors, because it is compatible with all other types, and is propagated
-- to any expression that has a subexpression of Any_Type. When resolving
-- operators, Any_Type is the initial type of the node before any of its
-- candidate interpretations has been examined. If after examining all of
-- them the type is still Any_Type, the node has no possible interpretation
-- and an error can be emitted (and Any_Type will be propagated upwards).
Any_Access : Entity_Id;
-- Used to resolve the overloaded literal NULL
Any_Array : Entity_Id;
-- Used to represent some unknown array type
Any_Boolean : Entity_Id;
-- The context type of conditions in IF and WHILE statements
Any_Character : Entity_Id;
-- Any_Character is used to label character literals, which in general
-- will not have an explicit declaration (this is true of the predefined
-- character types).
Any_Composite : Entity_Id;
-- The type Any_Composite is used for aggregates before type resolution.
-- It is compatible with any array or non-limited record type.
Any_Discrete : Entity_Id;
-- Used to represent some unknown discrete type
Any_Fixed : Entity_Id;
-- Used to represent some unknown fixed-point type
Any_Integer : Entity_Id;
-- Used to represent some unknown integer type
Any_Modular : Entity_Id;
-- Used to represent the result type of a boolean operation on an integer
-- literal. The result is not Universal_Integer, because it is only legal
-- in a modular context.
Any_Numeric : Entity_Id;
-- Used to represent some unknown numeric type
Any_Real : Entity_Id;
-- Used to represent some unknown real type
Any_Scalar : Entity_Id;
-- Used to represent some unknown scalar type
Any_String : Entity_Id;
-- The type Any_String is used for string literals before type resolution.
-- It corresponds to array (Positive range <>) of character where the
-- component type is compatible with any character type, not just
-- Standard_Character.
Raise_Type : Entity_Id;
-- The type Raise_Type denotes the type of a Raise_Expression. It is
-- compatible with all other types, and must eventually resolve to a
-- concrete type that is imposed by the context.
--
-- Historical note: we used to use Any_Type for this purpose, but the
-- confusion of meanings (Any_Type normally indicates an error) caused
-- difficulties. In particular some needed expansions were skipped since
-- the nodes in question looked like they had an error.
Universal_Integer : Entity_Id;
-- Entity for universal integer type. The bounds of this type correspond
-- to the largest supported integer type (i.e. Long_Long_Integer). It is
-- the type used for runtime calculations in type universal integer.
Universal_Real : Entity_Id;
-- Entity for universal real type. The bounds of this type correspond to
-- to the largest supported real type (i.e. Long_Long_Float). It is the
-- type used for runtime calculations in type universal real. Note that
-- this type is always IEEE format.
Universal_Fixed : Entity_Id;
-- Entity for universal fixed type. This is a type with arbitrary
-- precision that can only appear in a context with a specific type.
-- Universal_Fixed labels the result of multiplication or division of
-- two fixed point numbers, and has no specified bounds (since, unlike
-- universal integer and universal real, it is never used for runtime
-- calculations).
Standard_Integer_8 : Entity_Id;
Standard_Integer_16 : Entity_Id;
Standard_Integer_32 : Entity_Id;
Standard_Integer_64 : Entity_Id;
-- These are signed integer types with the indicated sizes. Used for the
-- underlying implementation types for fixed-point and enumeration types.
Standard_Short_Short_Unsigned : Entity_Id;
Standard_Short_Unsigned : Entity_Id;
Standard_Unsigned : Entity_Id;
Standard_Long_Unsigned : Entity_Id;
Standard_Long_Long_Unsigned : Entity_Id;
-- Unsigned types with same Esize as corresponding signed integer types
Standard_Unsigned_64 : Entity_Id;
-- An unsigned type, mod 2 ** 64, size of 64 bits.
Abort_Signal : Entity_Id;
-- Entity for abort signal exception
Standard_Op_Rotate_Left : Entity_Id;
Standard_Op_Rotate_Right : Entity_Id;
Standard_Op_Shift_Left : Entity_Id;
Standard_Op_Shift_Right : Entity_Id;
Standard_Op_Shift_Right_Arithmetic : Entity_Id;
-- These entities are used for shift operators generated by the expander
-----------------
-- Subprograms --
-----------------
procedure Tree_Read;
-- Initializes entity values in this package from the current tree file
-- using Tree_IO. Note that Tree_Read includes all the initialization that
-- is carried out by Create_Standard.
procedure Tree_Write;
-- Writes out the entity values in this package to the current tree file
-- using Tree_IO.
end Stand;
|
