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------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- S T A N D -- -- -- -- S p e c -- -- -- -- Copyright (C) 1992-2011, 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 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. Plays an important role in -- avoiding cascaded errors, since any node that remains labeled with -- this type corresponds to an already issued error message. Any_Type -- is propagated to avoid cascaded errors from a single type error. 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. 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, even if Long_Long_Float is Vax_Float -- (and in that case the bounds don't correspond exactly). 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, They are used -- for the underlying implementation types for fixed-point and enumeration -- types. Standard_Unsigned : Entity_Id; -- An unsigned type of the same size as Standard_Integer 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 Osint.Tree_Read. 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 Osint.Tree_Write. end Stand;
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