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An ambiguity in the description of ALGOL 60


When Algorithm 355 [Comm. ACM 12 (Oct. 1969), 562] was originally submitted to the Algorithms Department it contained a construct which pointed up an ambiguity in the description of ALGOL 60 [Revised Report on the Algorithmic Language ALGOL 60, Comm. ACM 6 (Jan. 1963), 1-17]. This ambiguity was not mentioned by Donald Knuth [The Remaining Trouble Spots in ALGOL 60, Comm. ACM 10 (Oct. 1967), 611-618].

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