X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=docs%2Fusers_guide%2Fusing.xml;h=3ab73a1b3b1be1edd4108451078b6e5dd0caa3b6;hb=23c11847ac06735217d778e4e78d527ca0d55649;hp=72f53b740b18cbf7284c8adc5c5f825bdad668bf;hpb=2f4e21c6f741995e20cc3b53b109ff9edf18eb3c;p=ghc-hetmet.git
diff --git a/docs/users_guide/using.xml b/docs/users_guide/using.xml
index 72f53b7..3ab73a1 100644
--- a/docs/users_guide/using.xml
+++ b/docs/users_guide/using.xml
@@ -310,7 +310,7 @@ module X where
Dependency-generation mode. In this mode, GHC can be
used to generate dependency information suitable for use in
a Makefile. See .
+ linkend="makefile-dependencies"/>.
@@ -839,7 +839,17 @@ ghc -c Foo.hs
:
- Turns on all warning options.
+ Turns on all warning options that indicate potentially
+ suspicious code. The warnings that are
+ not enabled by
+ are:
+
+
+
+
+
+
+
@@ -905,6 +915,31 @@ ghc -c Foo.hs
+ :
+
+
+ implicit prelude, warning
+ Have the compiler warn if the Prelude is implicitly
+ imported. This happens unless either the Prelude module is
+ explicitly imported with an import ... Prelude ...
+ line, or this implicit import is disabled (either by
+ or a
+ LANGUAGE NoImplicitPrelude pragma).
+
+ Note that no warning is given for syntax that implicitly
+ refers to the Prelude, even if
+ would change whether it refers to the Prelude.
+ For example, no warning is given when
+ 368 means
+ Prelude.fromInteger (368::Prelude.Integer)
+ (where Prelude refers to the actual Prelude module,
+ regardless of the imports of the module being compiled).
+
+ This warning is off by default.
+
+
+
+ :
@@ -1006,7 +1041,8 @@ f foo = foo { x = 6 }
If you would like GHC to check that every top-level
function/value has a type signature, use the
- option. This
+ option. As part of
+ the warning GHC also reports the inferred type. The
option is off by default.
@@ -1024,7 +1060,7 @@ f foo = foo { x = 6 }
in the inadvertent cyclic definition let x = ... x
... in.
- Consequently, this option does
+ Consequently, this option
will complain about cyclic recursive
definitions.
@@ -1135,6 +1171,20 @@ f "2" = 2
+ :
+
+
+ monomorphism restriction, warning
+ Have the compiler warn/inform you where in your source
+ the Haskell Monomorphism Restriction is applied. If applied silently
+ the MR can give rise to unexpected behaviour, so it can be helpful
+ to have an explicit warning that it is being applied.
+
+ This warning is off by default.
+
+
+
+ :
@@ -1226,7 +1276,7 @@ f "2" = 2
Note that higher optimisation levels cause more
cross-module optimisation to be performed, which can have an
impact on how much of your program needs to be recompiled when
- you change something. This is one reaosn to stick to
+ you change something. This is one reason to stick to
no-optimisation when developing code.
@@ -1368,7 +1418,7 @@ f "2" = 2
Exception.assert in source code (in
other words, rewriting Exception.assert p
e to e (see ). This flag is turned on by
+ linkend="assertions"/>). This flag is turned on by
.
@@ -1435,6 +1485,50 @@ f "2" = 2
+
+
+
+
+ Turn off the "state hack" whereby any lambda with a
+ State# token as argument is considered to be
+ single-entry, hence it is considered OK to inline things inside
+ it. This can improve performance of IO and ST monad code, but it
+ runs the risk of reducing sharing.
+
+
+
+
+
+
+
+
+
+ Tells GHC to omit all inessential information from the interface file
+ generated for the module being compiled (say M). This means that a module
+ importing M will see only the types of the functions that M exports, but not
+ their unfoldings, strictness info, etc. Hence, for example,
+ no function exported by M will be inlined
+ into an importing module. The benefit is that modules that import M will
+ need to be recompiled less often (only when M's exports change their type,
+ not when they change their implementation).
+
+
+
+
+
+
+
+
+
+
+ Tells GHC to ignore all inessential information when reading interface files.
+ That is, even if M.hi contains unfolding or strictness information
+ for a function, GHC will ignore that information.
+
+
+
+
+
:
strict constructor fields
@@ -1457,7 +1551,7 @@ f "2" = 2
-
+
@@ -1475,7 +1569,7 @@ f "2" = 2
- :
+ :
inlining, controllingunfolding, controlling
@@ -1501,7 +1595,7 @@ f "2" = 2
- :
+ inlining, controlling
@@ -1523,7 +1617,7 @@ f "2" = 2
&phases;
-
+ Using Concurrent HaskellConcurrent Haskellusing
@@ -1553,7 +1647,7 @@ f "2" = 2
-
+ Using SMP parallelismparallelism