ghc-9.10.3: The GHC API

Copyright | (c) The University of Glasgow 2001
License | BSD-style (see the file LICENSE)
Maintainer | Jeffrey Young <jeffrey.young@iohk.io> Luite Stegeman <luite.stegeman@iohk.io> Sylvain Henry <sylvain.henry@iohk.io> Josh Meredith <josh.meredith@iohk.io>
Stability | experimental
Safe Haskell | None
Language | GHC2021

GHC.JS.Make

Contents

- Injection Type classes
- Introduction functions
- Combinators
  - Hash combinators
- Literals
  - Math functions
- Statement helpers
- Orphan instances

Description

- Domain and Purpose

  GHC.JS.Make defines helper functions to ease the creation of JavaScript ASTs as defined in `Syntax`. Its purpose is twofold: make the EDSL more ergonomic to program in, and make errors in the EDSL look obvious because the EDSL is untyped. It is primarily concerned with injecting terms into the domain of the EDSL to construct JS programs in Haskell.

- Strategy

  The strategy for this module comes straight from gentzen; where we have two types of helper functions. Functions which inject terms into the EDSL, and combinator functions which operate on terms in the EDSL to construct new terms in the EDSL. Crucially, missing from this module are corresponding elimination or destructing functions which would project information from the EDSL back to Haskell. See `Utils` for such functions.

  - Introduction functions

    We define various primitive helpers which introduce terms in the EDSL, for example `jVar`, `jLam`, and `var` and `jString`. Similarly this module exports four typeclasses `ToExpr`, `ToStat`, `JVarMagic`, `JSArgument`. `ToExpr` injects values as a JS expression into the EDSL. `ToStat` injects values as JS statements into the EDSL. `JVarMagic` provides a polymorphic way to introduce a new name into the EDSL and `JSArgument` provides a polymorphic way to bind variable names for use in JS functions with different arities.

  - Combinator functions

    The rest of the module defines combinators which create terms in the EDSL from terms in the EDSL. Notable examples are `|=` and `||=`, `|=` is sugar for `AssignStat`, it is a binding form that declares `foo = bar` assuming foo has been already declared. `||=` is more sugar on top of `|=`, it is also a binding form that declares the LHS of `|=` before calling `|=` to bind a value, bar, to a variable foo. Other common examples are the `if_` and `math_` helpers such as `math_cos`.

- Consumers

  The entire JS backend consumes this module, e.g., the modules in GHC.StgToJS.*.

- Notation

  In this module we use `==>` in docstrings to show the translation from the JS EDSL domain to JS code. For example, `foo ||= bar ==> var foo; foo = bar;` should be read as `foo ||= bar` is in the EDSL domain and results in the JS code `var foo; foo = bar;` when compiled.

  In most cases functions prefixed with a `j` are monadic because the observably allocate. Notable exceptions are `jwhenS`, `jString` and the helpers for HashMaps.

Synopsis

- class ToJExpr a where
  - toJExpr :: a -> JStgExpr
  - toJExprFromList :: [a] -> JStgExpr
- class ToStat a where
  - toStat :: a -> JStgStat
- class JVarMagic a where
  - fresh :: JSM a
- class JSArgument args where
  - argList :: args -> [Ident]
  - args :: JSM args
- jString :: FastString -> JStgExpr
- jLam :: JSArgument args => (args -> JSM JStgStat) -> JSM JStgExpr
- jLam' :: JStgStat -> JStgExpr
- jFunction :: JSArgument args => Ident -> (args -> JSM JStgStat) -> JSM JStgStat
- jFunctionSized :: Ident -> Int -> ([JStgExpr] -> JSM JStgStat) -> JSM JStgStat
- jFunction' :: Ident -> JSM JStgStat -> JSM JStgStat
- jVar :: (JVarMagic t, ToJExpr t) => (t -> JSM JStgStat) -> JSM JStgStat
- jVars :: JSArgument args => (args -> JSM JStgStat) -> JSM JStgStat
- jFor :: (JStgExpr -> JStgStat) -> (JStgExpr -> JStgExpr) -> (JStgExpr -> JStgStat) -> (JStgExpr -> JStgStat) -> JSM JStgStat
- jForIn :: JStgExpr -> (JStgExpr -> JStgStat) -> JSM JStgStat
- jForEachIn :: JStgExpr -> (JStgExpr -> JStgStat) -> JSM JStgStat
- jTryCatchFinally :: (Ident -> JStgStat) -> (Ident -> JStgStat) -> (Ident -> JStgStat) -> JSM JStgStat
- (||=) :: Ident -> JStgExpr -> JStgStat
- (|=) :: JStgExpr -> JStgExpr -> JStgStat
- (.==.) :: JStgExpr -> JStgExpr -> JStgExpr
- (.===.) :: JStgExpr -> JStgExpr -> JStgExpr
- (.!=.) :: JStgExpr -> JStgExpr -> JStgExpr
- (.!==.) :: JStgExpr -> JStgExpr -> JStgExpr
- (.!) :: JStgExpr -> JStgExpr -> JStgExpr
- (.>.) :: JStgExpr -> JStgExpr -> JStgExpr
- (.>=.) :: JStgExpr -> JStgExpr -> JStgExpr
- (.<.) :: JStgExpr -> JStgExpr -> JStgExpr
- (.<=.) :: JStgExpr -> JStgExpr -> JStgExpr
- (.<<.) :: JStgExpr -> JStgExpr -> JStgExpr
- (.>>.) :: JStgExpr -> JStgExpr -> JStgExpr
- (.>>>.) :: JStgExpr -> JStgExpr -> JStgExpr
- (.|.) :: JStgExpr -> JStgExpr -> JStgExpr
- (.||.) :: JStgExpr -> JStgExpr -> JStgExpr
- (.&&.) :: JStgExpr -> JStgExpr -> JStgExpr
- if_ :: JStgExpr -> JStgExpr -> JStgExpr -> JStgExpr
- if10 :: JStgExpr -> JStgExpr
- if01 :: JStgExpr -> JStgExpr
- ifS :: JStgExpr -> JStgStat -> JStgStat -> JStgStat
- ifBlockS :: JStgExpr -> [JStgStat] -> [JStgStat] -> JStgStat
- jBlock :: Monoid a => [JSM a] -> JSM a
- jIf :: JStgExpr -> JSM JStgStat -> JSM JStgStat -> JSM JStgStat
- jwhenS :: JStgExpr -> JStgStat -> JStgStat
- app :: FastString -> [JStgExpr] -> JStgExpr
- appS :: FastString -> [JStgExpr] -> JStgStat
- returnS :: JStgExpr -> JStgStat
- loop :: JStgExpr -> (JStgExpr -> JStgExpr) -> (JStgExpr -> JSM JStgStat) -> JSM JStgStat
- loopBlockS :: JStgExpr -> (JStgExpr -> JStgExpr) -> (JStgExpr -> [JStgStat]) -> JSM JStgStat
- preIncrS :: JStgExpr -> JStgStat
- postIncrS :: JStgExpr -> JStgStat
- preDecrS :: JStgExpr -> JStgStat
- postDecrS :: JStgExpr -> JStgStat
- off8 :: JStgExpr -> JStgExpr -> JStgExpr
- off16 :: JStgExpr -> JStgExpr -> JStgExpr
- off32 :: JStgExpr -> JStgExpr -> JStgExpr
- off64 :: JStgExpr -> JStgExpr -> JStgExpr
- mask8 :: JStgExpr -> JStgExpr
- mask16 :: JStgExpr -> JStgExpr
- signExtend8 :: JStgExpr -> JStgExpr
- signExtend16 :: JStgExpr -> JStgExpr
- typeof :: JStgExpr -> JStgExpr
- returnStack :: JStgStat
- assignAllEqual :: HasDebugCallStack => [JStgExpr] -> [JStgExpr] -> JStgStat
- assignAll :: [JStgExpr] -> [JStgExpr] -> JStgStat
- assignAllReverseOrder :: [JStgExpr] -> [JStgExpr] -> JStgStat
- declAssignAll :: [Ident] -> [JStgExpr] -> JStgStat
- nullStat :: JStgStat
- (.^) :: JStgExpr -> FastString -> JStgExpr
- trace :: ToJExpr a => a -> JStgStat
- jhEmpty :: Map k JStgExpr
- jhSingle :: (Ord k, ToJExpr a) => k -> a -> Map k JStgExpr
- jhAdd :: (Ord k, ToJExpr a) => k -> a -> Map k JStgExpr -> Map k JStgExpr
- jhFromList :: [(FastString, JStgExpr)] -> JVal
- null_ :: JStgExpr
- undefined_ :: JStgExpr
- false_ :: JStgExpr
- true_ :: JStgExpr
- zero_ :: JStgExpr
- one_ :: JStgExpr
- two_ :: JStgExpr
- three_ :: JStgExpr
- math_log :: [JStgExpr] -> JStgExpr
- math_sin :: [JStgExpr] -> JStgExpr
- math_cos :: [JStgExpr] -> JStgExpr
- math_tan :: [JStgExpr] -> JStgExpr
- math_exp :: [JStgExpr] -> JStgExpr
- math_acos :: [JStgExpr] -> JStgExpr
- math_asin :: [JStgExpr] -> JStgExpr
- math_atan :: [JStgExpr] -> JStgExpr
- math_abs :: [JStgExpr] -> JStgExpr
- math_pow :: [JStgExpr] -> JStgExpr
- math_sqrt :: [JStgExpr] -> JStgExpr
- math_asinh :: [JStgExpr] -> JStgExpr
- math_acosh :: [JStgExpr] -> JStgExpr
- math_atanh :: [JStgExpr] -> JStgExpr
- math_cosh :: [JStgExpr] -> JStgExpr
- math_sinh :: [JStgExpr] -> JStgExpr
- math_tanh :: [JStgExpr] -> JStgExpr
- math_expm1 :: [JStgExpr] -> JStgExpr
- math_log1p :: [JStgExpr] -> JStgExpr
- math_fround :: [JStgExpr] -> JStgExpr
- data Solo a where
  - MkSolo a
  - pattern Solo :: a -> Solo a
- decl :: Ident -> JStgStat

# Injection Type classes

The `ToJExpr` class handles injection of of things into the EDSL as a JS expression

class ToJExpr a where Source #

Things that can be marshalled into javascript values. Instantiate for any necessary data structures.

Minimal complete definition

toJExpr

Methods

toJExpr :: a -> JStgExpr Source #

toJExprFromList :: [a] -> JStgExpr Source #

#### Instances

Instances details

ToJExpr FastString Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: FastString -> JStgExpr Source # toJExprFromList :: [FastString] -> JStgExpr Source #
ToJExpr Ident Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: Ident -> JStgExpr Source # toJExprFromList :: [Ident] -> JStgExpr Source #
ToJExpr JStgExpr Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: JStgExpr -> JStgExpr Source # toJExprFromList :: [JStgExpr] -> JStgExpr Source #
ToJExpr JVal Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: JVal -> JStgExpr Source # toJExprFromList :: [JVal] -> JStgExpr Source #
ToJExpr Special Source # |
Instance details Defined in GHC.StgToJS.Regs Methods toJExpr :: Special -> JStgExpr Source # toJExprFromList :: [Special] -> JStgExpr Source #
ToJExpr StgReg Source # |
Instance details Defined in GHC.StgToJS.Regs Methods toJExpr :: StgReg -> JStgExpr Source # toJExprFromList :: [StgReg] -> JStgExpr Source #
ToJExpr StgRet Source # |
Instance details Defined in GHC.StgToJS.Regs Methods toJExpr :: StgRet -> JStgExpr Source # toJExprFromList :: [StgRet] -> JStgExpr Source #
ToJExpr CIStatic Source # | static refs: array = references, null = nothing to report note: only works after all top-level objects have been created
Instance details Defined in GHC.StgToJS.Types Methods toJExpr :: CIStatic -> JStgExpr Source # toJExprFromList :: [CIStatic] -> JStgExpr Source #
ToJExpr ClosureType Source # |
Instance details Defined in GHC.StgToJS.Types Methods toJExpr :: ClosureType -> JStgExpr Source # toJExprFromList :: [ClosureType] -> JStgExpr Source #
ToJExpr JSRep Source # |
Instance details Defined in GHC.StgToJS.Types Methods toJExpr :: JSRep -> JStgExpr Source # toJExprFromList :: [JSRep] -> JStgExpr Source #
ToJExpr StaticLit Source # |
Instance details Defined in GHC.StgToJS.Types Methods toJExpr :: StaticLit -> JStgExpr Source # toJExprFromList :: [StaticLit] -> JStgExpr Source #
ToJExpr Integer Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: Integer -> JStgExpr Source # toJExprFromList :: [Integer] -> JStgExpr Source #
ToJExpr () Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: () -> JStgExpr Source # toJExprFromList :: [()] -> JStgExpr Source #
ToJExpr Bool Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: Bool -> JStgExpr Source # toJExprFromList :: [Bool] -> JStgExpr Source #
ToJExpr Char Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: Char -> JStgExpr Source # toJExprFromList :: [Char] -> JStgExpr Source #
ToJExpr Double Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: Double -> JStgExpr Source # toJExprFromList :: [Double] -> JStgExpr Source #
ToJExpr Int Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: Int -> JStgExpr Source # toJExprFromList :: [Int] -> JStgExpr Source #
ToJExpr a => ToJExpr [a] Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: [a] -> JStgExpr Source # toJExprFromList :: [[a]] -> JStgExpr Source #
ToJExpr a => ToJExpr (Map String a) Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: Map String a -> JStgExpr Source # toJExprFromList :: [Map String a] -> JStgExpr Source #
ToJExpr a => ToJExpr (UniqMap FastString a) Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: UniqMap FastString a -> JStgExpr Source # toJExprFromList :: [UniqMap FastString a] -> JStgExpr Source #
(ToJExpr a, ToJExpr b) => ToJExpr (a, b) Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: (a, b) -> JStgExpr Source # toJExprFromList :: [(a, b)] -> JStgExpr Source #
(ToJExpr a, ToJExpr b, ToJExpr c) => ToJExpr (a, b, c) Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: (a, b, c) -> JStgExpr Source # toJExprFromList :: [(a, b, c)] -> JStgExpr Source #
(ToJExpr a, ToJExpr b, ToJExpr c, ToJExpr d) => ToJExpr (a, b, c, d) Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: (a, b, c, d) -> JStgExpr Source # toJExprFromList :: [(a, b, c, d)] -> JStgExpr Source #
(ToJExpr a, ToJExpr b, ToJExpr c, ToJExpr d, ToJExpr e) => ToJExpr (a, b, c, d, e) Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: (a, b, c, d, e) -> JStgExpr Source # toJExprFromList :: [(a, b, c, d, e)] -> JStgExpr Source #
(ToJExpr a, ToJExpr b, ToJExpr c, ToJExpr d, ToJExpr e, ToJExpr f) => ToJExpr (a, b, c, d, e, f) Source # |
Instance details Defined in GHC.JS.Make Methods toJExpr :: (a, b, c, d, e, f) -> JStgExpr Source # toJExprFromList :: [(a, b, c, d, e, f)] -> JStgExpr Source #

class ToStat a where Source #

The `ToStat` class handles injection of of things into the EDSL as a JS statement. This ends up being polymorphic sugar for JS blocks, see helper function `expr2stat`. Instantiate for any necessary data structures.

Methods

toStat :: a -> JStgStat Source #

#### Instances

Instances details

ToStat JStgExpr Source # |
Instance details Defined in GHC.JS.Make Methods toStat :: JStgExpr -> JStgStat Source #
ToStat JStgStat Source # |
Instance details Defined in GHC.JS.Make Methods toStat :: JStgStat -> JStgStat Source #
ToStat [JStgExpr] Source # |
Instance details Defined in GHC.JS.Make Methods toStat :: [JStgExpr] -> JStgStat Source #
ToStat [JStgStat] Source # |
Instance details Defined in GHC.JS.Make Methods toStat :: [JStgStat] -> JStgStat Source #

class JVarMagic a where Source #

Type class that generates fresh `a`'s for the JS backend. You should almost never need to use this directly. Instead use `JSArgument`, for examples of how to employ these classes please see `jVar`, `jFunction` and call sites in the Rts.

Methods

fresh :: JSM a Source #

#### Instances

Instances details

JVarMagic Ident Source # |
Instance details Defined in GHC.JS.Make Methods fresh :: JSM Ident Source #
JVarMagic JStgExpr Source # |
Instance details Defined in GHC.JS.Make Methods fresh :: JSM JStgExpr Source #
JVarMagic JVal Source # |
Instance details Defined in GHC.JS.Make Methods fresh :: JSM JVal Source #

class JSArgument args where Source #

Type class that finds the form of arguments required for a JS syntax object. This class gives us a single interface to generate variables for functions that have different arities. Thus with it, we can have only one `jFunction` which is polymorphic over its arity, instead of `jFunction2`, `jFunction3` and so on.

Methods

argList :: args -> [Ident] Source #

args :: JSM args Source #

#### Instances

Instances details

(JVarMagic a, ToJExpr a) => JSArgument (Solo a) Source # |
Instance details Defined in GHC.JS.Make Methods argList :: Solo a -> [Ident] Source # args :: JSM (Solo a) Source #
(JVarMagic a, JVarMagic b, ToJExpr a, ToJExpr b) => JSArgument (a, b) Source # |
Instance details Defined in GHC.JS.Make Methods argList :: (a, b) -> [Ident] Source # args :: JSM (a, b) Source #
(JVarMagic a, ToJExpr a, JVarMagic b, ToJExpr b, JVarMagic c, ToJExpr c) => JSArgument (a, b, c) Source # |
Instance details Defined in GHC.JS.Make Methods argList :: (a, b, c) -> [Ident] Source # args :: JSM (a, b, c) Source #
(JVarMagic a, ToJExpr a, JVarMagic b, ToJExpr b, JVarMagic c, ToJExpr c, JVarMagic d, ToJExpr d) => JSArgument (a, b, c, d) Source # |
Instance details Defined in GHC.JS.Make Methods argList :: (a, b, c, d) -> [Ident] Source # args :: JSM (a, b, c, d) Source #
(JVarMagic a, ToJExpr a, JVarMagic b, ToJExpr b, JVarMagic c, ToJExpr c, JVarMagic d, ToJExpr d, JVarMagic e, ToJExpr e) => JSArgument (a, b, c, d, e) Source # |
Instance details Defined in GHC.JS.Make Methods argList :: (a, b, c, d, e) -> [Ident] Source # args :: JSM (a, b, c, d, e) Source #
(JVarMagic a, ToJExpr a, JVarMagic b, ToJExpr b, JVarMagic c, ToJExpr c, JVarMagic d, ToJExpr d, JVarMagic e, ToJExpr e, JVarMagic f, ToJExpr f) => JSArgument (a, b, c, d, e, f) Source # |
Instance details Defined in GHC.JS.Make Methods argList :: (a, b, c, d, e, f) -> [Ident] Source # args :: JSM (a, b, c, d, e, f) Source #
(JVarMagic a, ToJExpr a, JVarMagic b, ToJExpr b, JVarMagic c, ToJExpr c, JVarMagic d, ToJExpr d, JVarMagic e, ToJExpr e, JVarMagic f, ToJExpr f, JVarMagic g, ToJExpr g) => JSArgument (a, b, c, d, e, f, g) Source # |
Instance details Defined in GHC.JS.Make Methods argList :: (a, b, c, d, e, f, g) -> [Ident] Source # args :: JSM (a, b, c, d, e, f, g) Source #
(JVarMagic a, ToJExpr a, JVarMagic b, ToJExpr b, JVarMagic c, ToJExpr c, JVarMagic d, ToJExpr d, JVarMagic e, ToJExpr e, JVarMagic f, ToJExpr f, JVarMagic g, ToJExpr g, JVarMagic h, ToJExpr h) => JSArgument (a, b, c, d, e, f, g, h) Source # |
Instance details Defined in GHC.JS.Make Methods argList :: (a, b, c, d, e, f, g, h) -> [Ident] Source # args :: JSM (a, b, c, d, e, f, g, h) Source #
(JVarMagic a, ToJExpr a, JVarMagic b, ToJExpr b, JVarMagic c, ToJExpr c, JVarMagic d, ToJExpr d, JVarMagic e, ToJExpr e, JVarMagic f, ToJExpr f, JVarMagic g, ToJExpr g, JVarMagic h, ToJExpr h, JVarMagic i, ToJExpr i) => JSArgument (a, b, c, d, e, f, g, h, i) Source # |
Instance details Defined in GHC.JS.Make Methods argList :: (a, b, c, d, e, f, g, h, i) -> [Ident] Source # args :: JSM (a, b, c, d, e, f, g, h, i) Source #
(JVarMagic a, ToJExpr a, JVarMagic b, ToJExpr b, JVarMagic c, ToJExpr c, JVarMagic d, ToJExpr d, JVarMagic e, ToJExpr e, JVarMagic f, ToJExpr f, JVarMagic g, ToJExpr g, JVarMagic h, ToJExpr h, JVarMagic i, ToJExpr i, JVarMagic j, ToJExpr j) => JSArgument (a, b, c, d, e, f, g, h, i, j) Source # |
Instance details Defined in GHC.JS.Make Methods argList :: (a, b, c, d, e, f, g, h, i, j) -> [Ident] Source # args :: JSM (a, b, c, d, e, f, g, h, i, j) Source #

# Introduction functions

jString :: FastString -> JStgExpr Source #

Convert a ShortText to a Javascript String

jLam :: JSArgument args => (args -> JSM JStgStat) -> JSM JStgExpr Source #

Create a new anonymous function. The result is a `JExpr` expression. Usage:

    jLam $ \x -> jVar x + one_
    jLam $ \f -> (jLam $ \x -> (f `app` (x `app` x))) `app` (jLam $ \x -> (f `app` (x `app` x)))

jLam' :: JStgStat -> JStgExpr Source #

Special case of `jLam` where the anonymous function requires no fresh arguments.

jFunction Source #

Arguments

:: JSArgument args |
=> Ident | global name
-> (args -> JSM JStgStat) | function body, input is locally unique generated variables
-> JSM JStgStat |

Construct a top-level function subject to JS hoisting. This combinator is polymorphic over function arity so you can you use to define a JS syntax object in Haskell, which is a function in JS that takes 2 or 4 or whatever arguments. For a singleton function use the `Solo` constructor `MkSolo`. Usage:

an example from the Rts that defines a 1-arity JS function > jFunction (global "h$getReg") ((MkSolo n) -> return $ SwitchStat n getRegCases mempty)

an example of a two argument function from the Rts > jFunction (global "h$bh_lne") ((x, frameSize) -> bhLneStats s x frameSize)

jFunctionSized Source #

Arguments

:: Ident | global name
-> Int | Arity
-> ([JStgExpr] -> JSM JStgStat) | function body, input is locally unique generated variables
-> JSM JStgStat |

Construct a top-level function subject to JS hoisting. Special case where the arity cannot be deduced from the `args` parameter (atleast not without dependent types).

jFunction' Source #

Arguments

:: Ident | global name
-> JSM JStgStat | function body, input is locally unique generated variables
-> JSM JStgStat |

Construct a top-level function subject to JS hoisting. Special case where the function binds no parameters

jVar :: (JVarMagic t, ToJExpr t) => (t -> JSM JStgStat) -> JSM JStgStat Source #

Introduce only one new variable into scope for the duration of the enclosed expression. The result is a block statement. Usage:

'jVar $ x -> mconcat [jVar x ||= one_, ...'

jVars :: JSArgument args => (args -> JSM JStgStat) -> JSM JStgStat Source #

Introduce one or many new variables into scope for the duration of the enclosed expression. This function reifies the number of arguments based on the container of the input function. We intentionally avoid lists and instead opt for tuples because lists are not sized in general. The result is a block statement. Usage:

    jVars $ (x,y) -> mconcat [ x |= one_,  y |= two_,  x + y]

jFor Source #

Arguments

:: (JStgExpr -> JStgStat) | initialization function
-> (JStgExpr -> JStgExpr) | predicate
-> (JStgExpr -> JStgStat) | step function
-> (JStgExpr -> JStgStat) | body
-> JSM JStgStat |

Create a `for` statement given a function for initialization, a predicate to step to, a step and a body Usage:

     jFor (|= zero_) (.<. Int 65536) preIncrS
            (j -> ...something with the counter j...)

jForIn :: JStgExpr -> (JStgExpr -> JStgStat) -> JSM JStgStat Source #

Create a 'for in' statement. Usage:

    jForIn {expression} $ x -> {block involving x}

jForEachIn :: JStgExpr -> (JStgExpr -> JStgStat) -> JSM JStgStat Source #

As with "jForIn" but creating a "for each in" statement.

jTryCatchFinally :: (Ident -> JStgStat) -> (Ident -> JStgStat) -> (Ident -> JStgStat) -> JSM JStgStat Source #

As with "jForIn" but creating a "for each in" statement.

# Combinators

Combinators operate on terms in the JS EDSL domain to create new terms in the EDSL domain.

(||=) :: Ident -> JStgExpr -> JStgStat infixl 2 Source #

Declare a variable and then Assign the variable to an expression

    foo |= expr ==> var foo; foo = expr;

(|=) :: JStgExpr -> JStgExpr -> JStgStat infixl 2 Source #

Assign a variable to an expression

    foo |= expr ==> var foo = expr;

(.==.) :: JStgExpr -> JStgExpr -> JStgExpr infixl 6 Source #

JS infix Equality operators

(.===.) :: JStgExpr -> JStgExpr -> JStgExpr infixl 6 Source #

JS infix Equality operators

(.!=.) :: JStgExpr -> JStgExpr -> JStgExpr infixl 6 Source #

JS infix Equality operators

(.!==.) :: JStgExpr -> JStgExpr -> JStgExpr infixl 6 Source #

JS infix Equality operators

(.!) :: JStgExpr -> JStgExpr -> JStgExpr infixl 8 Source #

return the expression at idx of obj

    obj .! idx ==> obj[idx]

(.>.) :: JStgExpr -> JStgExpr -> JStgExpr infixl 7 Source #

JS infix Ord operators

(.>=.) :: JStgExpr -> JStgExpr -> JStgExpr infixl 7 Source #

JS infix Ord operators

(.<.) :: JStgExpr -> JStgExpr -> JStgExpr infixl 7 Source #

JS infix Ord operators

(.<=.) :: JStgExpr -> JStgExpr -> JStgExpr infixl 7 Source #

JS infix Ord operators

(.<<.) :: JStgExpr -> JStgExpr -> JStgExpr infixl 9 Source #

JS infix bit shift operators

(.>>.) :: JStgExpr -> JStgExpr -> JStgExpr infixl 9 Source #

JS infix bit shift operators

(.>>>.) :: JStgExpr -> JStgExpr -> JStgExpr infixl 9 Source #

JS infix bit shift operators

(.|.) :: JStgExpr -> JStgExpr -> JStgExpr Source #

JS infix bit operators

(.||.) :: JStgExpr -> JStgExpr -> JStgExpr infixl 8 Source #

JS infix bit operators

(.&&.) :: JStgExpr -> JStgExpr -> JStgExpr infixl 8 Source #

JS infix bit operators

if_ :: JStgExpr -> JStgExpr -> JStgExpr -> JStgExpr Source #

JS if-expression

    if_ e1 e2 e3 ==> e1 ? e2 : e3

if10 :: JStgExpr -> JStgExpr Source #

if-expression that returns 1 if condition = true, 0 otherwise

    if10 e ==> e ? 1 : 0

if01 :: JStgExpr -> JStgExpr Source #

if-expression that returns 0 if condition = true, 1 otherwise

    if01 e ==> e ? 0 : 1

ifS :: JStgExpr -> JStgStat -> JStgStat -> JStgStat Source #

If-expression which returns statements, see related `ifBlockS`

    if e s1 s2 ==> if(e) { s1 } else { s2 }

ifBlockS :: JStgExpr -> [JStgStat] -> [JStgStat] -> JStgStat Source #

If-expression which returns blocks

    ifBlockS e s1 s2 ==> if(e) { s1 } else { s2 }

jBlock :: Monoid a => [JSM a] -> JSM a Source #

jIf :: JStgExpr -> JSM JStgStat -> JSM JStgStat -> JSM JStgStat Source #

Version of a JS if-expression which admits monadic actions in its branches

jwhenS :: JStgExpr -> JStgStat -> JStgStat Source #

A when-statement as syntactic sugar via `ifS`

    jwhenS cond block ==> if(cond) { block } else {  }

app :: FastString -> [JStgExpr] -> JStgExpr Source #

an expression application, see related `appS`

    app f xs ==> f(xs)

appS :: FastString -> [JStgExpr] -> JStgStat Source #

A statement application, see the expression form `app`

returnS :: JStgExpr -> JStgStat Source #

Return a `JStgExpr`

loop :: JStgExpr -> (JStgExpr -> JStgExpr) -> (JStgExpr -> JSM JStgStat) -> JSM JStgStat Source #

"for" loop with increment at end of body

loopBlockS :: JStgExpr -> (JStgExpr -> JStgExpr) -> (JStgExpr -> [JStgStat]) -> JSM JStgStat Source #

"for" loop with increment at end of body

preIncrS :: JStgExpr -> JStgStat Source #

Prefix-increment a `JStgExpr`

postIncrS :: JStgExpr -> JStgStat Source #

Postfix-increment a `JStgExpr`

preDecrS :: JStgExpr -> JStgStat Source #

Prefix-decrement a `JStgExpr`

postDecrS :: JStgExpr -> JStgStat Source #

Postfix-decrement a `JStgExpr`

off8 :: JStgExpr -> JStgExpr -> JStgExpr Source #

Byte indexing of o with a 8-bit offset

off16 :: JStgExpr -> JStgExpr -> JStgExpr Source #

Byte indexing of o with a 16-bit offset

off32 :: JStgExpr -> JStgExpr -> JStgExpr Source #

Byte indexing of o with a 32-bit offset

off64 :: JStgExpr -> JStgExpr -> JStgExpr Source #

Byte indexing of o with a 64-bit offset

mask8 :: JStgExpr -> JStgExpr Source #

a bit mask to retrieve the lower 8-bits

mask16 :: JStgExpr -> JStgExpr Source #

a bit mask to retrieve the lower 16-bits

signExtend8 :: JStgExpr -> JStgExpr Source #

Sign-extend/narrow a 8-bit value

signExtend16 :: JStgExpr -> JStgExpr Source #

Sign-extend/narrow a 16-bit value

typeof :: JStgExpr -> JStgExpr Source #

Given a `JStgExpr`, return the its type.

returnStack :: JStgStat Source #

assignAllEqual :: HasDebugCallStack => [JStgExpr] -> [JStgExpr] -> JStgStat Source #

assignAll :: [JStgExpr] -> [JStgExpr] -> JStgStat Source #

assignAllReverseOrder :: [JStgExpr] -> [JStgExpr] -> JStgStat Source #

declAssignAll :: [Ident] -> [JStgExpr] -> JStgStat Source #

nullStat :: JStgStat Source #

The empty JS statement

(.^) :: JStgExpr -> FastString -> JStgExpr infixl 8 Source #

Select a property `prop`, from and object `obj`

    obj .^ prop ==> obj.prop

trace :: ToJExpr a => a -> JStgStat Source #

## Hash combinators

jhEmpty :: Map k JStgExpr Source #

The empty JS HashMap

jhSingle :: (Ord k, ToJExpr a) => k -> a -> Map k JStgExpr Source #

A singleton JS HashMap

jhAdd :: (Ord k, ToJExpr a) => k -> a -> Map k JStgExpr -> Map k JStgExpr Source #

insert a key-value pair into a JS HashMap

jhFromList :: [(FastString, JStgExpr)] -> JVal Source #

Construct a JS HashMap from a list of key-value pairs

# Literals

Literals in the JS EDSL are constants in the Haskell domain. These are useful helper values and never change

null_ :: JStgExpr Source #

The JS literal `null`

undefined_ :: JStgExpr Source #

The JS literal `undefined`

false_ :: JStgExpr Source #

The JS literal `false`

true_ :: JStgExpr Source #

The JS literal `true`

zero_ :: JStgExpr Source #

The JS literal 0

one_ :: JStgExpr Source #

The JS literal 1

two_ :: JStgExpr Source #

The JS literal 2

three_ :: JStgExpr Source #

The JS literal 3

## Math functions

Math functions in the EDSL are literals, with the exception of `math_` which is the sole math introduction function.

math_log :: [JStgExpr] -> JStgExpr Source #

math_sin :: [JStgExpr] -> JStgExpr Source #

math_cos :: [JStgExpr] -> JStgExpr Source #

math_tan :: [JStgExpr] -> JStgExpr Source #

math_exp :: [JStgExpr] -> JStgExpr Source #

math_acos :: [JStgExpr] -> JStgExpr Source #

math_asin :: [JStgExpr] -> JStgExpr Source #

math_atan :: [JStgExpr] -> JStgExpr Source #

math_abs :: [JStgExpr] -> JStgExpr Source #

math_pow :: [JStgExpr] -> JStgExpr Source #

math_sqrt :: [JStgExpr] -> JStgExpr Source #

math_asinh :: [JStgExpr] -> JStgExpr Source #

math_acosh :: [JStgExpr] -> JStgExpr Source #

math_atanh :: [JStgExpr] -> JStgExpr Source #

math_cosh :: [JStgExpr] -> JStgExpr Source #

math_sinh :: [JStgExpr] -> JStgExpr Source #

math_tanh :: [JStgExpr] -> JStgExpr Source #

math_expm1 :: [JStgExpr] -> JStgExpr Source #

math_log1p :: [JStgExpr] -> JStgExpr Source #

math_fround :: [JStgExpr] -> JStgExpr Source #

# Statement helpers

data Solo a #

Constructors

MkSolo a |

Bundled Patterns

pattern Solo :: a -> Solo a |

#### Instances

Instances details

MonadZip Solo | Since: base-4.15.0.0
Instance details Defined in Control.Monad.Zip Methods mzip :: Solo a -> Solo b -> Solo (a, b) Source # mzipWith :: (a -> b -> c) -> Solo a -> Solo b -> Solo c Source # munzip :: Solo (a, b) -> (Solo a, Solo b) Source #
Foldable1 Solo | Since: base-4.18.0.0

Instance details

Defined in Data.Foldable1

Methods

fold1 :: Semigroup m => Solo m -> m Source #

foldMap1 :: Semigroup m => (a -> m) -> Solo a -> m Source #

foldMap1' :: Semigroup m => (a -> m) -> Solo a -> m Source #

toNonEmpty :: Solo a -> NonEmpty a Source #

maximum :: Ord a => Solo a -> a Source #

minimum :: Ord a => Solo a -> a Source #

head :: Solo a -> a Source #

last :: Solo a -> a Source #

foldrMap1 :: (a -> b) -> (a -> b -> b) -> Solo a -> b Source #

foldlMap1' :: (a -> b) -> (b -> a -> b) -> Solo a -> b Source #

foldlMap1 :: (a -> b) -> (b -> a -> b) -> Solo a -> b Source #

foldrMap1' :: (a -> b) -> (a -> b -> b) -> Solo a -> b Source #

Eq1 Solo | Since: base-4.15
Instance details Defined in Data.Functor.Classes Methods liftEq :: (a -> b -> Bool) -> Solo a -> Solo b -> Bool Source #
Ord1 Solo | Since: base-4.15
Instance details Defined in Data.Functor.Classes Methods liftCompare :: (a -> b -> Ordering) -> Solo a -> Solo b -> Ordering Source #
Read1 Solo | Since: base-4.15
Instance details Defined in Data.Functor.Classes Methods liftReadsPrec :: (Int -> ReadS a) -> ReadS [a] -> Int -> ReadS (Solo a) Source # liftReadList :: (Int -> ReadS a) -> ReadS [a] -> ReadS [Solo a] Source # liftReadPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec (Solo a) Source # liftReadListPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec [Solo a] Source #
Show1 Solo | Since: base-4.15
Instance details Defined in Data.Functor.Classes Methods liftShowsPrec :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> Int -> Solo a -> ShowS Source # liftShowList :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> [Solo a] -> ShowS Source #
NFData1 Solo | Since: deepseq-1.4.6.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Solo a -> () Source #
Applicative Solo |
Instance details Defined in GHC.Internal.Base Methods pure :: a -> Solo a # (<*>) :: Solo (a -> b) -> Solo a -> Solo b # liftA2 :: (a -> b -> c) -> Solo a -> Solo b -> Solo c # (*>) :: Solo a -> Solo b -> Solo b # (<*) :: Solo a -> Solo b -> Solo a #
Functor Solo |
Instance details Defined in GHC.Internal.Base Methods fmap :: (a -> b) -> Solo a -> Solo b # (<$) :: a -> Solo b -> Solo a #
Monad Solo |
Instance details Defined in GHC.Internal.Base Methods (>>=) :: Solo a -> (a -> Solo b) -> Solo b # (>>) :: Solo a -> Solo b -> Solo b # return :: a -> Solo a #
MonadFix Solo |
Instance details Defined in GHC.Internal.Control.Monad.Fix Methods mfix :: (a -> Solo a) -> Solo a #
Foldable Solo |

Instance details

Defined in GHC.Internal.Data.Foldable

Methods

fold :: Monoid m => Solo m -> m #

foldMap :: Monoid m => (a -> m) -> Solo a -> m #

foldMap' :: Monoid m => (a -> m) -> Solo a -> m #

foldr :: (a -> b -> b) -> b -> Solo a -> b #

foldr' :: (a -> b -> b) -> b -> Solo a -> b #

foldl :: (b -> a -> b) -> b -> Solo a -> b #

foldl' :: (b -> a -> b) -> b -> Solo a -> b #

foldr1 :: (a -> a -> a) -> Solo a -> a #

foldl1 :: (a -> a -> a) -> Solo a -> a #

toList :: Solo a -> [a] #

null :: Solo a -> Bool #

length :: Solo a -> Int #

elem :: Eq a => a -> Solo a -> Bool #

maximum :: Ord a => Solo a -> a #

minimum :: Ord a => Solo a -> a #

sum :: Num a => Solo a -> a #

product :: Num a => Solo a -> a #

Traversable Solo |
Instance details Defined in GHC.Internal.Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> Solo a -> f (Solo b) # sequenceA :: Applicative f => Solo (f a) -> f (Solo a) # mapM :: Monad m => (a -> m b) -> Solo a -> m (Solo b) # sequence :: Monad m => Solo (m a) -> m (Solo a) #
Generic1 Solo |

Instance details

Defined in GHC.Internal.Generics

Associated Types

type Rep1 Solo |
Instance details Defined in GHC.Internal.Generics type Rep1 Solo = D1 ('MetaData "Solo" "GHC.Tuple" "ghc-prim" 'False) (C1 ('MetaCons "MkSolo" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) Par1))

Methods

from1 :: Solo a -> Rep1 Solo a #

to1 :: Rep1 Solo a -> Solo a #

NFData a => NFData (Solo a) | Since: deepseq-1.4.6.0
Instance details Defined in Control.DeepSeq Methods rnf :: Solo a -> () Source #
(JVarMagic a, ToJExpr a) => JSArgument (Solo a) Source # |
Instance details Defined in GHC.JS.Make Methods argList :: Solo a -> [Ident] Source # args :: JSM (Solo a) Source #
Monoid a => Monoid (Solo a) |
Instance details Defined in GHC.Internal.Base Methods mempty :: Solo a # mappend :: Solo a -> Solo a -> Solo a # mconcat :: [Solo a] -> Solo a #
Semigroup a => Semigroup (Solo a) |
Instance details Defined in GHC.Internal.Base Methods (<>) :: Solo a -> Solo a -> Solo a # sconcat :: NonEmpty (Solo a) -> Solo a # stimes :: Integral b => b -> Solo a -> Solo a #
Data a => Data (Solo a) |

Instance details

Defined in GHC.Internal.Data.Data

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Solo a -> c (Solo a) #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Solo a) #

toConstr :: Solo a -> Constr #

dataTypeOf :: Solo a -> DataType #

dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Solo a)) #

dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Solo a)) #

gmapT :: (forall b. Data b => b -> b) -> Solo a -> Solo a #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Solo a -> r #

gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Solo a -> r #

gmapQ :: (forall d. Data d => d -> u) -> Solo a -> [u] #

gmapQi :: Int -> (forall d. Data d => d -> u) -> Solo a -> u #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> Solo a -> m (Solo a) #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Solo a -> m (Solo a) #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Solo a -> m (Solo a) #

Bounded a => Bounded (Solo a) |
Instance details Defined in GHC.Internal.Enum Methods minBound :: Solo a # maxBound :: Solo a #
Enum a => Enum (Solo a) |
Instance details Defined in GHC.Internal.Enum Methods succ :: Solo a -> Solo a # pred :: Solo a -> Solo a # toEnum :: Int -> Solo a # fromEnum :: Solo a -> Int # enumFrom :: Solo a -> [Solo a] # enumFromThen :: Solo a -> Solo a -> [Solo a] # enumFromTo :: Solo a -> Solo a -> [Solo a] # enumFromThenTo :: Solo a -> Solo a -> Solo a -> [Solo a] #
Generic (Solo a) |

Instance details

Defined in GHC.Internal.Generics

Associated Types

type Rep (Solo a) |
Instance details Defined in GHC.Internal.Generics type Rep (Solo a) = D1 ('MetaData "Solo" "GHC.Tuple" "ghc-prim" 'False) (C1 ('MetaCons "MkSolo" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 a)))

Methods

from :: Solo a -> Rep (Solo a) x #

to :: Rep (Solo a) x -> Solo a #

Ix a => Ix (Solo a) |
Instance details Defined in GHC.Internal.Ix Methods range :: (Solo a, Solo a) -> [Solo a] # index :: (Solo a, Solo a) -> Solo a -> Int # unsafeIndex :: (Solo a, Solo a) -> Solo a -> Int # inRange :: (Solo a, Solo a) -> Solo a -> Bool # rangeSize :: (Solo a, Solo a) -> Int # unsafeRangeSize :: (Solo a, Solo a) -> Int #
Read a => Read (Solo a) |
Instance details Defined in GHC.Internal.Read Methods readsPrec :: Int -> ReadS (Solo a) # readList :: ReadS [Solo a] # readPrec :: ReadPrec (Solo a) # readListPrec :: ReadPrec [Solo a] #
Show a => Show (Solo a) |
Instance details Defined in GHC.Internal.Show Methods showsPrec :: Int -> Solo a -> ShowS # show :: Solo a -> String # showList :: [Solo a] -> ShowS #
Eq a => Eq (Solo a) |
Instance details Defined in GHC.Classes Methods (==) :: Solo a -> Solo a -> Bool # (/=) :: Solo a -> Solo a -> Bool #
Ord a => Ord (Solo a) |
Instance details Defined in GHC.Classes Methods compare :: Solo a -> Solo a -> Ordering # (<) :: Solo a -> Solo a -> Bool # (<=) :: Solo a -> Solo a -> Bool # (>) :: Solo a -> Solo a -> Bool # (>=) :: Solo a -> Solo a -> Bool # max :: Solo a -> Solo a -> Solo a # min :: Solo a -> Solo a -> Solo a #
type Rep1 Solo |
Instance details Defined in GHC.Internal.Generics type Rep1 Solo = D1 ('MetaData "Solo" "GHC.Tuple" "ghc-prim" 'False) (C1 ('MetaCons "MkSolo" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) Par1))
type Rep (Solo a) |
Instance details Defined in GHC.Internal.Generics type Rep (Solo a) = D1 ('MetaData "Solo" "GHC.Tuple" "ghc-prim" 'False) (C1 ('MetaCons "MkSolo" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 a)))

decl :: Ident -> JStgStat Source #

construct a js declaration with the given identifier

# Orphan instances

Num JStgExpr Source # |
Instance details Methods (+) :: JStgExpr -> JStgExpr -> JStgExpr # (-) :: JStgExpr -> JStgExpr -> JStgExpr # (*) :: JStgExpr -> JStgExpr -> JStgExpr # negate :: JStgExpr -> JStgExpr # abs :: JStgExpr -> JStgExpr # signum :: JStgExpr -> JStgExpr # fromInteger :: Integer -> JStgExpr #
Fractional JStgExpr Source # |
Instance details Methods (/) :: JStgExpr -> JStgExpr -> JStgExpr # recip :: JStgExpr -> JStgExpr # fromRational :: Rational -> JStgExpr #