1.1 --- a/src/HOL/IMP/Compiler.thy	Thu Jul 28 11:49:03 2011 +0200
     1.2 +++ b/src/HOL/IMP/Compiler.thy	Thu Jul 28 15:15:26 2011 +0200
     1.3 @@ -65,22 +65,17 @@
     1.4  
     1.5  declare iexec1.intros
     1.6  
     1.7 -(* FIXME: why does code gen not work with fun? *)
     1.8 -inductive
     1.9 -  exec1 :: "instr list \<Rightarrow> config \<Rightarrow> config \<Rightarrow> bool"
    1.10 -    ("(_/ \<turnstile> (_ \<rightarrow>/ _))" [50,0,0] 50) where
    1.11 - "\<lbrakk> P!!i \<turnstile>i (i,s,stk) \<rightarrow> c'; 0 \<le> i; i < isize P \<rbrakk> \<Longrightarrow> P \<turnstile> (i,s,stk) \<rightarrow> c'"
    1.12 -
    1.13 -code_pred exec1 .
    1.14 -
    1.15 -declare exec1.intros [intro!]
    1.16 -
    1.17 -inductive_cases exec1_elim [elim!]: "P \<turnstile> c \<rightarrow> c'"
    1.18 -
    1.19 -lemma exec1_simp [simp]:
    1.20 +definition
    1.21 +  exec1 :: "instr list \<Rightarrow> config \<Rightarrow> config \<Rightarrow> bool"  ("(_/ \<turnstile> (_ \<rightarrow>/ _))" [50,0,0] 50) 
    1.22 +where
    1.23    "P \<turnstile> c \<rightarrow> c' = 
    1.24     (\<exists>i s stk. c = (i,s,stk) \<and> P!!i \<turnstile>i (i,s,stk) \<rightarrow> c' \<and> 0 \<le> i \<and> i < isize P)"
    1.25 -  by auto
    1.26 +
    1.27 +declare exec1_def [simp] 
    1.28 +
    1.29 +lemma exec1I [intro, code_pred_intro]:
    1.30 +  "\<lbrakk> P!!i \<turnstile>i (i,s,stk) \<rightarrow> c'; 0 \<le> i; i < isize P \<rbrakk> \<Longrightarrow> P \<turnstile> (i,s,stk) \<rightarrow> c'"
    1.31 +  by simp
    1.32  
    1.33  inductive exec :: "instr list \<Rightarrow> config \<Rightarrow> config \<Rightarrow> bool" ("_/ \<turnstile> (_ \<rightarrow>*/ _)" 50)
    1.34  where
    1.35 @@ -91,7 +86,7 @@
    1.36  
    1.37  lemmas exec_induct = exec.induct[split_format(complete)]
    1.38  
    1.39 -code_pred exec .
    1.40 +code_pred exec by force
    1.41  
    1.42  values
    1.43    "{(i,map t [''x'',''y''],stk) | i t stk.