Copyright	(c) 2022 Composewell Technologies
License	BSD-3-Clause
Maintainer	streamly@composewell.com
Stability	released
Portability	GHC
Safe Haskell	Safe-Inferred
Language	Haskell2010

Streamly.Unicode.String

Contents

Setup

Description

Convenient template Haskell quasiquoters to format strings.

The str quasiquoter retains newlines in the string when the line is split across multiple lines. The unwords . lines idiom can be used on the resulting string to collapse it into a single line.

Synopsis

str :: QuasiQuoter

Setup

To execute the code examples provided in this module in ghci, please run the following commands first.

>>> :m
>>> :set -XQuasiQuotes
>>> import Streamly.Internal.Unicode.String

str :: QuasiQuoter Source #

A QuasiQuoter that treats the input as a string literal:

>>> [str|x|]
"x"

Any #{symbol} is replaced by the value of the Haskell symbol symbol which is in scope:

>>> x = "hello"
>>> [str|#{x} world!|]
"hello world!"

## means a literal # without the special meaning for referencing haskell symbols:

>>> [str|##{x} world!|]
"#{x} world!"

A # at the end of line means the line continues to the next line without introducing a newline character:

>>> :{
[str|hello#
world!|]
:}
"hello world!"

Bugs: because of a bug in parsers, a lone # at the end of input gets removed.