| Quellcodebibliothek Statistik Leitseite products/sources/formale Sprachen/Roqc/theories/Ltac2/ (Beweissystem des Inria Version 9.1.0©) Datei vom 15.8.2025 mit Größe 2 kB |
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Quelle Printf.v Sprache: Coq |
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(************************************************************************) (* * The Rocq Prover / The Rocq Development Team *) (* v * Copyright INRIA, CNRS and contributors *) (* <O___,, * (see version control and CREDITS file for authors & dates) *) (* \VV/ **************************************************************) (* // * This file is distributed under the terms of the *) (* * GNU Lesser General Public License Version 2.1 *) (* * (see LICENSE file for the text of the license) *) (************************************************************************) Require Import Ltac2.Message. (** This file defines a printf notation for easiness of writing messages *) (** The built-in "format" notation scope can be used to create well-typed variadic printing commands following a printf-like syntax. The "format" scope parses quoted strings which contain either raw string data or printing specifications. Raw strings will be output verbatim as if they were passed to Ltac2.Message.of_string. Printing specifications are of the form << '%' type >> where the type value defines which kind of arguments will be accepted and how they will be printed. They can take the following values. - << i >>: takes an argument of type int and behaves as Message.of_int - << I >>: takes an argument of type ident and behaves as Message.of_ident - << s >>: takes an argument of type string and behaves as Message.of_string - << m >>: takes an argument of type message and prints it unmodified - << t >>: takes an argument of type constr and behaves as Message.of_constr - << a >>: takes two arguments << f >> of type << (unit -> 'a -> message) >> and << x >> of type << 'a >> and behaves as << f () x >> - << A >>: takes two arguments << f >> of type << ('a -> message) >> and << x >> of type << 'a >> and behaves as << f x >> - << % >>: outputs << % >> verbatim TODO: add printing modifiers. *) Ltac2 printf fmt := Format.kfprintf print fmt. Ltac2 fprintf fmt := Format.kfprintf (fun x => x) fmt. (** The two following notations are made available when this module is imported. - printf will parse a format and generate a function taking the corresponding arguments ant printing the resulting message as per Message.print. In particular when fully applied it has type unit. - fprintf behaves similarly but return the message as a value instead of printing it. *) Ltac2 Notation "printf" fmt(format) := printf fmt. Ltac2 Notation "fprintf" fmt(format) := fprintf fmt.
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2026-04-04