Text.Shakespeare

shakespeare-2.0.8: A toolkit for making compile-time interpolated templates

Safe Haskell | None
Language | Haskell98

Text.Shakespeare

Contents

- low-level
- Internal

Description

NOTE: This module should be considered internal, and will be hidden in future releases.

Synopsis

- data ShakespeareSettings = ShakespeareSettings {
  - varChar :: Char
  - urlChar :: Char
  - intChar :: Char
  - toBuilder :: Exp
  - wrap :: Exp
  - unwrap :: Exp
  - justVarInterpolation :: Bool
  - preConversion :: Maybe PreConvert
  - modifyFinalValue :: Maybe Exp
  }
- data PreConvert = PreConvert {
  - preConvert :: PreConversion
  - preEscapeIgnoreBalanced :: [Char]
  - preEscapeIgnoreLine :: [Char]
  - wrapInsertion :: Maybe WrapInsertion
  }
- data WrapInsertion = WrapInsertion {
  - wrapInsertionIndent :: Maybe String
  - wrapInsertionStartBegin :: String
  - wrapInsertionSeparator :: String
  - wrapInsertionStartClose :: String
  - wrapInsertionEnd :: String
  - wrapInsertionAddParens :: Bool
  }
- data PreConversion
  - = ReadProcess String [String]
  - | Id
- defaultShakespeareSettings :: ShakespeareSettings
- shakespeare :: ShakespeareSettings -> QuasiQuoter
- shakespeareFile :: ShakespeareSettings -> FilePath -> Q Exp
- shakespeareFileReload :: ShakespeareSettings -> FilePath -> Q Exp
- shakespeareFromString :: ShakespeareSettings -> String -> Q Exp
- shakespeareUsedIdentifiers :: ShakespeareSettings -> String -> [(Deref, VarType)]
- type RenderUrl url = url -> QueryParameters -> Text
- data VarType
  - = VTPlain
  - | VTUrl
  - | VTUrlParam
  - | VTMixin
- data Deref
- type Parser = Parsec String [String]
- preFilter :: Maybe FilePath -> ShakespeareSettings -> String -> IO String
- shakespeareRuntime :: ShakespeareSettings -> FilePath -> [(Deref, VarExp url)] -> Shakespeare url
- pack' :: String -> Text

# Documentation

data ShakespeareSettings

Constructors

ShakespeareSettings |
Fields varChar :: Char urlChar :: Char intChar :: Char toBuilder :: Exp wrap :: Exp unwrap :: Exp justVarInterpolation :: Bool preConversion :: Maybe PreConvert modifyFinalValue :: Maybe Exp A transformation applied to the final expression. Most often, this would be used to force the type of the expression to help make more meaningful error messages.

Instances

Lift ShakespeareSettings |

data PreConvert

Coffeescript, TypeScript, and other languages compiles down to Javascript. Previously we waited until the very end, at the rendering stage to perform this compilation. Lets call is a post-conversion This had the advantage that all Haskell values were inserted first: for example a value could be inserted that Coffeescript would compile into Javascript. While that is perhaps a safer approach, the advantage is not used in practice: it was that way mainly for ease of implementation. The down-side is the template must be compiled down to Javascript during every request. If instead we do a pre-conversion to compile down to Javascript, we only need to perform the compilation once.

The problem then is the insertion of Haskell values: we need a hole for them. This can be done with variables known to the language. During the pre-conversion we first modify all Haskell insertions So #{a} is change to shakespeare_var_a Then we can place the Haskell values in a function wrapper that exposes those variables: (function(shakespeare_var_a){ ... shakespeare_var_a ...}) TypeScript can compile that, and then we tack an application of the Haskell values onto the result: (#{a})

preEscapeIgnoreBalanced is used to not insert backtacks for variable already inside strings or backticks. coffeescript will happily ignore the interpolations, and backticks would not be treated as escaping in that context. preEscapeIgnoreLine was added to ignore comments (which in Coffeescript begin with a '#')

Constructors

PreConvert |
Fields preConvert :: PreConversion preEscapeIgnoreBalanced :: [Char] preEscapeIgnoreLine :: [Char] wrapInsertion :: Maybe WrapInsertion

Instances

Lift PreConvert |

data WrapInsertion

Constructors

WrapInsertion |
Fields wrapInsertionIndent :: Maybe String wrapInsertionStartBegin :: String wrapInsertionSeparator :: String wrapInsertionStartClose :: String wrapInsertionEnd :: String wrapInsertionAddParens :: Bool

Instances

Lift WrapInsertion |

data PreConversion

Constructors

ReadProcess String [String] |
Id |

Instances

Lift PreConversion |

defaultShakespeareSettings :: ShakespeareSettings

shakespeare :: ShakespeareSettings -> QuasiQuoter

shakespeareFile :: ShakespeareSettings -> FilePath -> Q Exp

shakespeareFileReload :: ShakespeareSettings -> FilePath -> Q Exp

# low-level

shakespeareFromString :: ShakespeareSettings -> String -> Q Exp

shakespeareUsedIdentifiers :: ShakespeareSettings -> String -> [(Deref, VarType)]

Determine which identifiers are used by the given template, useful for creating systems like yesod devel.

type RenderUrl url = url -> QueryParameters -> Text

data VarType

Constructors

VTPlain |
VTUrl |
VTUrlParam |
VTMixin |

Instances

Bounded VarType |
Enum VarType |
Eq VarType |
Data VarType |
Ord VarType |
Show VarType |
Generic VarType |
type Rep VarType |

data Deref

Instances

Eq Deref |
Data Deref |
Ord Deref |
Read Deref |
Show Deref |
Lift Deref |

type Parser = Parsec String [String]

A parser with a user state of [String]

preFilter

Arguments

:: Maybe FilePath | for error reporting
-> ShakespeareSettings |
-> String |
-> IO String |

# Internal

shakespeareRuntime :: ShakespeareSettings -> FilePath -> [(Deref, VarExp url)] -> Shakespeare url

pack' :: String -> Text