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-- Copyright (C) 2007-2010 Gabriel Dos Reis
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions are
-- met:
--
-- - Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
--
-- - Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in
-- the documentation and/or other materials provided with the
-- distribution.
--
-- - Neither the name of The Numerical Algorithms Group Ltd. nor the
-- names of its contributors may be used to endorse or promote products
-- derived from this software without specific prior written permission.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
-- OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
--
import boot_-pkg
namespace BOOT
--% Basic types used throughout Boot codes.
++ Type of nothing. Bottom of the abstract machine type lattice.
++ Since Lisp functions always returns something, we cannot
++ use the `nil' type specifier (the ideal answer). Second
++ best possibility is to have Void-returning functions
++ systematically return `nil'. However, until the Lisp
++ backend is fixed, we will use the interpretation that a
++ Void-returning function may return anything, but nobody cares.
++ Hence, the choice below which contradicts the very first line
++ of this description.
%Void <=>
true
++ Type of truth values.
%Boolean <=>
BOOLEAN
++ Type of 8-bit sized unsigned integer values.
%Byte <=>
UNSIGNED_-BYTE 8
++ Type of characters -- no distinction yet.
%Char <=>
CHARACTER
++ Type of fixnums.
%Short <=>
FIXNUM
++ Type of unlimited precision integers.
%Bignum <=>
BIGNUM
%Integer <=>
INTEGER
%IntegerSection n <=>
INTEGER n
++ Type of single precision floating point numbers. Most of the
++ time, this is a 32-bit datatype on IEEE-754 host.
%SingleFloat <=>
)if %hasFeature KEYWORD::GCL
SHORT_-FLOAT
)else
SINGLE_-FLOAT
)endif
++ Type of double precision floating point numbers. Most of the time,
++ this is a 64-bit sized datatype on IEEE-756 host.
%DoubleFloat <=>
DOUBLE_-FLOAT
++ General type for numbers.
%Number <=>
NUMBER
++ Type of identifiers. Ideally, we want actually want to exclude
++ Lisp oddities such as NIL and T.
%Symbol <=>
SYMBOL
++ The type of literal strings
%String <=>
STRING
++ Anything that is not a cons cell.
%Atom <=> atom
++ nil or a cons cell. Ideally, this should be parameterized, but
++ we cannot afford that luxury with Lisp.
%List <=>
LIST
++ The type of a linear homogeneous non-extensible array.
%SimpleArray a <=>
SIMPLE_-ARRAY a
%Vector a <=> VECTOR a
%Thing <=> true
%Sequence <=> SEQUENCE
%Pair <=> CONS
%Maybe a <=> null or a
--% Data structures for the compiler
%Constructor <=> %Symbol -- constructor
%Form <=> %Number or %Symbol or %String or %Pair -- input syntax form
%Instantiation <=> [%Constructor,:%Form] -- constructor instance
%Env <=> %List -- compiling env
%Mode <=> %Symbol or %String or %List -- type of forms
%Code <=> %Form or %Char -- generated code
%Triple <=> -- form + type + env
[%Code,:[%Mode,:[%Env,:null]]]
%Signature -- signature
<=> %Symbol or %Pair
%Modemap <=> %List -- modemap
%ConstructorKind <=> -- kind of ctor instances
MEMBER(category,domain,package)
%Shell <=> SIMPLE_-VECTOR -- constructor instantiation
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