Hoogle Search
Within LTS Haskell 24.4 (ghc-9.10.2)
Note that Stackage only displays results for the latest LTS and Nightly snapshot. Learn more.
printDoc :: Mode -> Int -> Handle -> Doc -> IO ()ghc-lib-parser GHC.Utils.Ppr No documentation available.
printDoc_ :: Mode -> Int -> Handle -> Doc -> IO ()ghc-lib-parser GHC.Utils.Ppr No documentation available.
printLeftRender :: Handle -> Doc -> IO ()ghc-lib-parser GHC.Utils.Ppr No documentation available.
printWarning :: MonadIO m => String -> m ()dhall Dhall.Util Output a warning message on stderr.
printRange :: IPv4Range -> IO ()ip Net.IPv4 Print an IPv4Range. Helper function that exists mostly for testing purposes.
printRange :: IPv6Range -> IO ()ip Net.IPv6 Print an IPv6Range using the textual encoding.
printTestCase :: Testable prop => String -> prop -> Propertymassiv-test Test.Massiv.Utils Adds the given string to the counterexample if the property fails.
printf :: PrintfType r => String -> rrebase Rebase.Prelude Format a variable number of arguments with the C-style formatting string.
>>> printf "%s, %d, %.4f" "hello" 123 pi hello, 123, 3.1416
The return value is either String or (IO a) (which should be (IO ()), but Haskell's type system makes this hard). The format string consists of ordinary characters and conversion specifications, which specify how to format one of the arguments to printf in the output string. A format specification is introduced by the % character; this character can be self-escaped into the format string using %%. A format specification ends with a format character that provides the primary information about how to format the value. The rest of the conversion specification is optional. In order, one may have flag characters, a width specifier, a precision specifier, and type-specific modifier characters. Unlike C printf(3), the formatting of this printf is driven by the argument type; formatting is type specific. The types formatted by printf "out of the box" are: printf is also extensible to support other types: see below. A conversion specification begins with the character %, followed by zero or more of the following flags:- left adjust (default is right adjust) + always use a sign (+ or -) for signed conversions space leading space for positive numbers in signed conversions 0 pad with zeros rather than spaces # use an \"alternate form\": see below
When both flags are given, - overrides 0 and + overrides space. A negative width specifier in a * conversion is treated as positive but implies the left adjust flag. The "alternate form" for unsigned radix conversions is as in C printf(3):%o prefix with a leading 0 if needed %x prefix with a leading 0x if nonzero %X prefix with a leading 0X if nonzero %b prefix with a leading 0b if nonzero %[eEfFgG] ensure that the number contains a decimal point
Any flags are followed optionally by a field width:num field width * as num, but taken from argument list
The field width is a minimum, not a maximum: it will be expanded as needed to avoid mutilating a value. Any field width is followed optionally by a precision:.num precision . same as .0 .* as num, but taken from argument list
Negative precision is taken as 0. The meaning of the precision depends on the conversion type.Integral minimum number of digits to show RealFloat number of digits after the decimal point String maximum number of characters
The precision for Integral types is accomplished by zero-padding. If both precision and zero-pad are given for an Integral field, the zero-pad is ignored. Any precision is followed optionally for Integral types by a width modifier; the only use of this modifier being to set the implicit size of the operand for conversion of a negative operand to unsigned:hh Int8 h Int16 l Int32 ll Int64 L Int64
The specification ends with a format character:c character Integral d decimal Integral o octal Integral x hexadecimal Integral X hexadecimal Integral b binary Integral u unsigned decimal Integral f floating point RealFloat F floating point RealFloat g general format float RealFloat G general format float RealFloat e exponent format float RealFloat E exponent format float RealFloat s string String v default format any type
The "%v" specifier is provided for all built-in types, and should be provided for user-defined type formatters as well. It picks a "best" representation for the given type. For the built-in types the "%v" specifier is converted as follows:c Char u other unsigned Integral d other signed Integral g RealFloat s String
Mismatch between the argument types and the format string, as well as any other syntactic or semantic errors in the format string, will cause an exception to be thrown at runtime. Note that the formatting for RealFloat types is currently a bit different from that of C printf(3), conforming instead to showEFloat, showFFloat and showGFloat (and their alternate versions showFFloatAlt and showGFloatAlt). This is hard to fix: the fixed versions would format in a backward-incompatible way. In any case the Haskell behavior is generally more sensible than the C behavior. A brief summary of some key differences:- Haskell printf never uses the default "6-digit" precision used by C printf.
- Haskell printf treats the "precision" specifier as indicating the number of digits after the decimal point.
- Haskell printf prints the exponent of e-format numbers without a gratuitous plus sign, and with the minimum possible number of digits.
- Haskell printf will place a zero after a decimal point when possible.
print_commands :: Bool -> Sh a -> Sh ashelly Shelly Create a sub-Sh with command echoing on or off Defaults to False, set to True by verbosely
print_commands_with :: (Text -> IO ()) -> Sh a -> Sh ashelly Shelly Create a sub-Sh in which commands are sent to the user-defined function.