split HaskLiteralsAndTyCons into two files

[coq-hetmet.git] / src / HaskLiterals.v

diff --git a/src/HaskLiterals.v b/src/HaskLiterals.v
new file mode 100644 (file)
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--- /dev/null
+++ b/src/HaskLiterals.v
@@ -0,0 +1,73 @@
+(*********************************************************************************************************************************)
+(* HaskLiterals: representation of compile-time constants (literals)                                                             *)
+(*********************************************************************************************************************************)
+
+Generalizable All Variables.
+Require Import Preamble.
+Require Import General.
+Require Import Coq.Strings.String.
+Require Import HaskKinds.
+Require Import HaskTyCons.
+
+(* Since GHC is written in Haskell, compile-time Haskell constants are represented using Haskell (Prelude) types *)
+Variable HaskInt         : Type.                      Extract Inlined Constant HaskInt               => "Prelude.Int".
+Variable HaskChar        : Type.                      Extract Inlined Constant HaskChar              => "Prelude.Char".
+Variable HaskFastString  : Type.                      Extract Inlined Constant HaskFastString        => "FastString.FastString".
+Variable HaskInteger     : Type.                      Extract Inlined Constant HaskInteger           => "Prelude.Integer".
+Variable HaskRational    : Type.                      Extract Inlined Constant HaskRational          => "Prelude.Rational".
+
+(* This type extracts exactly onto GHC's Literal.Literal type *)
+Inductive HaskLiteral :=
+| HaskMachChar     : HaskChar                                               -> HaskLiteral
+| HaskMachStr      : HaskFastString                                         -> HaskLiteral
+| HaskMachNullAddr :                                                           HaskLiteral
+| HaskMachInt      : HaskInteger                                            -> HaskLiteral
+| HaskMachInt64    : HaskInteger                                            -> HaskLiteral
+| HaskMachWord     : HaskInteger                                            -> HaskLiteral
+| HaskMachWord64   : HaskInteger                                            -> HaskLiteral
+| HaskMachFloat    : HaskRational                                           -> HaskLiteral
+| HaskMachDouble   : HaskRational                                           -> HaskLiteral
+| HaskMachLabel    : HaskFastString -> option HaskInt -> HaskFunctionOrData -> HaskLiteral
+with HaskFunctionOrData : Type := HaskIsFunction | HaskIsData.
+
+Extract Inductive HaskLiteral => "Literal.Literal"
+  [ "Literal.MachChar"
+    "Literal.MachStr"
+    "Literal.MachNullAddr"
+    "Literal.MachInt"
+    "Literal.MachInt64"
+    "Literal.MachWord"
+    "Literal.MachWord64"
+    "Literal.MachFloat"
+    "Literal.MachDouble"
+    "Literal.MachLabel" ].
+Extract Inductive HaskFunctionOrData =>
+  "BasicTypes.FunctionOrData" [ "BasicTypes.IsFunction" "BasicTypes.IsData" ].
+
+Variable haskLiteralToString : HaskLiteral -> string.    Extract Inlined Constant haskLiteralToString     => "outputableToString".
+Instance HaskLiteralToString : ToString HaskLiteral := { toString := haskLiteralToString }.
+
+(* the TyCons for each of the literals above *)
+Variable addrPrimTyCon       : TyCon.   Extract Inlined Constant addrPrimTyCon   => "TysPrim.addrPrimTyCon".
+Variable intPrimTyCon        : TyCon.   Extract Inlined Constant intPrimTyCon    => "TysPrim.intPrimTyCon".
+Variable wordPrimTyCon       : TyCon.   Extract Inlined Constant wordPrimTyCon   => "TysPrim.wordPrimTyCon".
+Variable int64PrimTyCon      : TyCon.   Extract Inlined Constant int64PrimTyCon  => "TysPrim.int64PrimTyCon".
+Variable word64PrimTyCon     : TyCon.   Extract Inlined Constant word64PrimTyCon => "TysPrim.word64PrimTyCon".
+Variable floatPrimTyCon      : TyCon.   Extract Inlined Constant floatPrimTyCon  => "TysPrim.floatPrimTyCon".
+Variable doublePrimTyCon     : TyCon.   Extract Inlined Constant doublePrimTyCon => "TysPrim.doublePrimTyCon".
+Variable charPrimTyCon       : TyCon.   Extract Inlined Constant charPrimTyCon   => "TysPrim.charPrimTyCon".
+
+(* retrieves the TyCon for a given Literal *)
+Definition haskLiteralToTyCon (lit:HaskLiteral) : TyCon :=
+match lit with
+  | HaskMachNullAddr    => addrPrimTyCon
+  | HaskMachChar _      => charPrimTyCon
+  | HaskMachStr  _      => addrPrimTyCon
+  | HaskMachInt  _      => intPrimTyCon
+  | HaskMachWord  _     => wordPrimTyCon
+  | HaskMachInt64  _    => int64PrimTyCon
+  | HaskMachWord64  _   => word64PrimTyCon
+  | HaskMachFloat _     => floatPrimTyCon
+  | HaskMachDouble _    => doublePrimTyCon
+  | HaskMachLabel _ _ _ => addrPrimTyCon
+end.