Copyright | (c) The University of Glasgow 1994-2002 |
---|---|

License | see libraries/base/LICENSE |

Maintainer | [email protected] |

Stability | internal |

Portability | non-portable (GHC extensions) |

Safe Haskell | Trustworthy |

Language | Haskell2010 |

The GHC.Err module defines the code for the wired-in error functions, which have a special type in the compiler (with "open tyvars").

We cannot define these functions in a module where they might be used (e.g., GHC.Base), because the magical wired-in type will get confused with what the typechecker figures out.

Used for compiler-generated error message; encoding saves bytes of string junk.

error :: forall (r :: RuntimeRep). forall (a :: TYPE r). HasCallStack => [Char] -> a Source

`error`

stops execution and displays an error message.

errorWithoutStackTrace :: forall (r :: RuntimeRep). forall (a :: TYPE r). [Char] -> a Source

A variant of `error`

that does not produce a stack trace.

Since: base-4.9.0.0

undefined :: forall (r :: RuntimeRep). forall (a :: TYPE r). HasCallStack => a Source

A special case of `error`

. It is expected that compilers will recognize this and insert error messages which are more appropriate to the context in which `undefined`

appears.

© The University of Glasgow and others

Licensed under a BSD-style license (see top of the page).

https://downloads.haskell.org/~ghc/8.8.3/docs/html/libraries/base-4.13.0.0/GHC-Err.html