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Pack format_spec -- README.md


?- use_module(library(format_spec)).
?- format_spec("Hello, ~s~n", Spec).
Spec = [ text("Hello, ")
       , escape(nothing, no_colon, s)
       , escape(nothing, no_colon, n)

?- spec_arity($Spec, Arity).
Arity = 1.

?- spec_types($Spec, Types).
Types = [text].

?- check.
Warning: foo.pl:6:4:
    In goal: format("~ oops",[_G3495])
    Invalid format string: "~ oops"
Warning: foo.pl:7:4:
    In goal: format("hi",[superfluous])
    Wrong argument count. Expected 0, got 1
Warning: foo.pl:9:4:
    In goal: debug(something,"Worth $~f",[nothing])
    Type error: `float' expected, found `nothing' (an atom)


Parse, analyze and check your format/2 strings. In SWI Prolog 7.1.5 or later, load this module and run check/0 to check your code for common format string errors. If you only want the check/0 integration, load the module with

:- use_module(library(format_spec), [])).

See Synopsis above for examples.

Changes in this Version

  • Initial public release


Using SWI-Prolog 6.3 or later:

?- pack_install(format_spec).

This module uses semantic versioning.

Source code available and pull requests accepted at http://github.com/mndrix/format_spec

- Michael Hendricks <michael@ndrix.org>