summaryrefslogtreecommitdiff
path: root/doc
diff options
context:
space:
mode:
authorGravatar Adam Chlipala <adam@chlipala.net>2010-12-20 19:28:41 -0500
committerGravatar Adam Chlipala <adam@chlipala.net>2010-12-20 19:28:41 -0500
commit092aff9de00b332bcd813b0c64b00c8681d031ca (patch)
treeebf76ca34c81803bf8385e4fae1e61bc5bf300d2 /doc
parent87b8ec32a32ca8dab3f155461d2d74efcfdb2fce (diff)
Fix manual mistake about '@' notations; remove obsolete demos
Diffstat (limited to 'doc')
-rw-r--r--doc/manual.tex2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/manual.tex b/doc/manual.tex
index da12d3c2..f517411d 100644
--- a/doc/manual.tex
+++ b/doc/manual.tex
@@ -524,7 +524,7 @@ A signature item or declaration $\mt{type} \; x$ or $\mt{type} \; x = \tau$ is e
A signature item or declaration $\mt{class} \; x = \lambda y \Rightarrow c$ may be abbreviated $\mt{class} \; x \; y = c$.
-Handling of implicit and explicit constructor arguments may be tweaked with some prefixes to variable references. An expression $@x$ is a version of $x$ where all implicit constructor arguments have been made explicit. An expression $@@x$ achieves the same effect, additionally halting automatic resolution of type class instances and automatic proving of disjointness constraints. The default is that implicit arguments are inserted automatically after any reference to a non-local variable, or after any application of a non-local variable to one or more arguments. For such an expression, implicit wildcard arguments are added for the longest prefix of the expression's type consisting only of implicit polymorphism, type class instances, and disjointness obligations. The same syntax works for variables projected out of modules and for capitalized variables (datatype constructors).
+Handling of implicit and explicit constructor arguments may be tweaked with some prefixes to variable references. An expression $@x$ is a version of $x$ where all type class instance and disjointness arguments have been made explicit. An expression $@@x$ achieves the same effect, additionally making explicit all implicit constructor arguments. The default is that implicit arguments are inserted automatically after any reference to a non-local variable, or after any application of a non-local variable to one or more arguments. For such an expression, implicit wildcard arguments are added for the longest prefix of the expression's type consisting only of implicit polymorphism, type class instances, and disjointness obligations. The same syntax works for variables projected out of modules and for capitalized variables (datatype constructors).
At the expression level, an analogue is available of the composite $\lambda$ form for constructors. We define the language of binders as $b ::= p \mid [x] \mid [x \; ? \; \kappa] \mid X \mid [c \sim c]$. A lone variable $[x]$ stands for an implicit constructor variable of unspecified kind. The standard value-level function binder is recovered as the type-annotated pattern form $x : \tau$. It is a compile-time error to include a pattern $p$ that does not match every value of the appropriate type.