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ALGOL X was the code name given to the programming language which the Working Group 2.1 on ALGOL of the International Federation for Information Processing was to develop as a successor to ALGOL 60. It attempted to find a "short-term solution to existing difficulties". According to de Morgan〔Algol Bulletin 41, Jul 1977, ''(The Algollers )''〕 ''"... the Algol 60 devotees had not been idle... they set out to eliminate the dreaded Remaining Trouble Spots. They called their Algol 60 'Modified'."'' One ''ALGOL X'' compiler is known to have existed, it was written with the AED-0 system ("Automated Engineering Design", also referred to as"ALGOL Extended for Design") by Douglas T. Ross of MIT.〔Douglas T. Ross, October 1966 (AN ALGORITHMIC THEORY OF LANGUAGE ) (AB26.2.2 page 6)〕 Example class definition: (An extract from AB26.2.2) class expression is constant (real value) ora variable (string printname) ora class pair is (sum ora difference ora product ora quotient)((expression) left operand, right operand, derivative); Example class usage: (expression) X; (constant) Y; (pair) Z; (product) Q; X := Y:= constant(10.5); Z := Q := product(variable("ALPHA"), constant(2.), constant(2.)) "Initially the proposal for an update to Algol was Algol X, with Algol Y being the name reserved for the corresponding metalanguage. Van Wijngaarden produced a paper for the 1963 IFIP programming language committee, entitled “Generalized Algol,” which contained the basic concepts which were eventually incorporated into Algol 68."() == The ALGOL Bulletin on ALGOL X == * AB21.3.1 - G. Seegmuller: Some proposals for ALGOL X () * AB21.3.2 - Joachim von Peschke: Proposals for ALGOL X () * AB22.3.2 - J.N. Merner: Own concept and ALGOL X () * AB22.3.10 - M. Woodger: ALGOL X, Note on the proposed successor to ALGOL 60 () * AB25.0.1 - ALGOL Bulletin - ALGOL X () * AB26.2.2 - Douglas T. Ross: Features essential for a workable ALGOL X () 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「ALGOL X」の詳細全文を読む スポンサード リンク
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