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asnip-ada_language.bdy
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asnip-ada_language.bdy
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--------------------------------------------------------------------------
-- ASnip Source Code Decorator
-- Copyright (C) 2006, Georg Bauhaus
--
-- 1. Permission is hereby granted to use, copy, modify and/or distribute
-- this package, provided that:
-- * copyright notices are retained unchanged,
-- * any distribution of this package, whether modified or not,
-- includes this license text.
-- 2. Permission is hereby also granted to distribute binary programs which
-- depend on this package. If the binary program depends on a modified
-- version of this package, you are encouraged to publicly release the
-- modified version of this package.
--
-- THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT WARRANTY. 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 AUTHORS BE LIABLE TO ANY PARTY FOR
-- ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-- DAMAGES ARISING IN ANY WAY OUT OF THE USE OF THIS PACKAGE.
--------------------------------------------------------------------------
-- eMail: [email protected]
with binary_search;
with Ada.Strings.Wide_Fixed;
package body ASnip.Ada_Language is
-- set up the binary search for keywords
function "<"(a, b: WORD) return BOOLEAN;
-- `a` is sorted before `b` by characters
-- ! pre: same letter case of ASCII characters in `a` and `b`
function "="(a, b: WORD) return BOOLEAN;
-- same characters
-- ! pre: same letter case of ASCII characters in `a` and `b`
-- NOTE: `is_reserved_word` arranges for proper character case
function "<"(a, b: WORD) return BOOLEAN is
begin
return a.all < b.all;
end "<";
function "="(a, b: WORD) return BOOLEAN is
begin
return a'length = b'length and then
a.all = b.all;
end "=";
function contains is new binary_search
(ELEMENT => WORD,
INDEX => WORDS_IDX,
SORTED_LIST => WORDLIST);
-- Perform comparison such that upper and lower case ASCII letters
-- are considered equal. (For searching lists of reserved words.)
-- See `Support.Comp_Mapping`
use Ada.Strings.Wide_Maps, Ada.Strings.Wide_Fixed;
function is_reserved_word(list: WORDLIST; s: STR) return BOOLEAN is
S_ascii_up: aliased constant STR :=
translate(s, Support.Comp_Mapping);
begin
return contains(list, S_ascii_up'unchecked_access);
end is_reserved_word;
end ASnip.Ada_Language;