--- a/src/HOL/IMP/Util.thy Thu Dec 01 15:41:58 2011 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,25 +0,0 @@
-(* Author: Tobias Nipkow *)
-
-theory Util imports Main
-begin
-
-subsection "Show sets of variables as lists"
-
-text {* Sets may be infinite and are not always displayed by element
- if computed as values. Lists do not have this problem.
-
- We define a function @{text show} that converts a set of
- variable names into a list. To keep things simple, we rely on
- the convention that we only use single letter names.
-*}
-definition
- letters :: "string list" where
- "letters = map (\<lambda>c. [c]) chars"
-
-definition
- "show" :: "string set \<Rightarrow> string list" where
- "show S = filter (\<lambda>x. x \<in> S) letters"
-
-value "show {''x'', ''z''}"
-
-end
--- a/src/HOL/IMP/Vars.thy Thu Dec 01 15:41:58 2011 +0100
+++ b/src/HOL/IMP/Vars.thy Thu Dec 01 20:52:16 2011 +0100
@@ -2,9 +2,28 @@
header "Definite Assignment Analysis"
-theory Vars imports Util BExp
+theory Vars imports BExp
begin
+subsection "Show sets of variables as lists"
+
+text {* Sets may be infinite and are not always displayed by element
+ if computed as values. Lists do not have this problem.
+
+ We define a function @{text show} that converts a set of
+ variable names into a list. To keep things simple, we rely on
+ the convention that we only use single letter names.
+*}
+definition
+ letters :: "string list" where
+ "letters = map (\<lambda>c. [c]) chars"
+
+definition
+ "show" :: "string set \<Rightarrow> string list" where
+ "show S = filter (\<lambda>x. x \<in> S) letters"
+
+value "show {''x'', ''z''}"
+
subsection "The Variables in an Expression"
text{* We need to collect the variables in both arithmetic and boolean
--- a/src/HOL/IsaMakefile Thu Dec 01 15:41:58 2011 +0100
+++ b/src/HOL/IsaMakefile Thu Dec 01 20:52:16 2011 +0100
@@ -530,7 +530,7 @@
IMP/Procs_Dyn_Vars_Dyn.thy IMP/Procs_Stat_Vars_Dyn.thy \
IMP/Procs_Stat_Vars_Stat.thy IMP/Sec_Type_Expr.thy IMP/Sec_Typing.thy \
IMP/Sec_TypingT.thy IMP/Small_Step.thy IMP/Star.thy IMP/Types.thy \
- IMP/Util.thy IMP/VC.thy IMP/Vars.thy \
+ IMP/VC.thy IMP/Vars.thy \
IMP/ROOT.ML IMP/document/root.tex IMP/document/root.bib
@cd IMP && $(ISABELLE_TOOL) usedir -g true -b $(OUT)/HOL HOL-IMP