author | bulwahn |
Thu, 02 Jun 2011 08:55:08 +0200 | |
changeset 43146 | 09f74fda1b1d |
parent 43047 | 26774ccb1c74 |
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permissions | -rw-r--r-- |
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(* Author: Lukas Bulwahn, TU Muenchen *) |
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header {* Counterexample generator preforming narrowing-based testing *} |
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theory Quickcheck_Narrowing |
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imports Main "~~/src/HOL/Library/Code_Char" |
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uses |
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("~~/src/HOL/Tools/Quickcheck/narrowing_generators.ML") |
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begin |
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subsection {* Counterexample generator *} |
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subsubsection {* Code generation setup *} |
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code_type typerep |
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("Haskell" "Typerep") |
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code_const Typerep.Typerep |
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("Haskell" "Typerep") |
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code_reserved Haskell Typerep |
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subsubsection {* Type @{text "code_int"} for Haskell's Int type *} |
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typedef (open) code_int = "UNIV \<Colon> int set" |
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morphisms int_of of_int by rule |
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lemma of_int_int_of [simp]: |
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"of_int (int_of k) = k" |
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by (rule int_of_inverse) |
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lemma int_of_of_int [simp]: |
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"int_of (of_int n) = n" |
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by (rule of_int_inverse) (rule UNIV_I) |
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lemma code_int: |
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"(\<And>n\<Colon>code_int. PROP P n) \<equiv> (\<And>n\<Colon>int. PROP P (of_int n))" |
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proof |
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fix n :: int |
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assume "\<And>n\<Colon>code_int. PROP P n" |
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then show "PROP P (of_int n)" . |
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next |
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fix n :: code_int |
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assume "\<And>n\<Colon>int. PROP P (of_int n)" |
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then have "PROP P (of_int (int_of n))" . |
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then show "PROP P n" by simp |
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qed |
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lemma int_of_inject [simp]: |
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"int_of k = int_of l \<longleftrightarrow> k = l" |
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by (rule int_of_inject) |
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lemma of_int_inject [simp]: |
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"of_int n = of_int m \<longleftrightarrow> n = m" |
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by (rule of_int_inject) (rule UNIV_I)+ |
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instantiation code_int :: equal |
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begin |
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definition |
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"HOL.equal k l \<longleftrightarrow> HOL.equal (int_of k) (int_of l)" |
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instance proof |
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qed (auto simp add: equal_code_int_def equal_int_def eq_int_refl) |
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end |
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instantiation code_int :: number |
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begin |
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definition |
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"number_of = of_int" |
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instance .. |
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end |
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lemma int_of_number [simp]: |
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"int_of (number_of k) = number_of k" |
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by (simp add: number_of_code_int_def number_of_is_id) |
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definition nat_of :: "code_int => nat" |
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where |
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"nat_of i = nat (int_of i)" |
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code_datatype "number_of \<Colon> int \<Rightarrow> code_int" |
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instantiation code_int :: "{minus, linordered_semidom, semiring_div, linorder}" |
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begin |
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definition [simp, code del]: |
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"0 = of_int 0" |
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definition [simp, code del]: |
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"1 = of_int 1" |
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definition [simp, code del]: |
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"n + m = of_int (int_of n + int_of m)" |
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definition [simp, code del]: |
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"n - m = of_int (int_of n - int_of m)" |
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definition [simp, code del]: |
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"n * m = of_int (int_of n * int_of m)" |
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definition [simp, code del]: |
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"n div m = of_int (int_of n div int_of m)" |
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definition [simp, code del]: |
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"n mod m = of_int (int_of n mod int_of m)" |
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definition [simp, code del]: |
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117 |
"n \<le> m \<longleftrightarrow> int_of n \<le> int_of m" |
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118 |
|
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119 |
definition [simp, code del]: |
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120 |
"n < m \<longleftrightarrow> int_of n < int_of m" |
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121 |
|
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122 |
|
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123 |
instance proof |
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qed (auto simp add: code_int left_distrib zmult_zless_mono2) |
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125 |
|
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126 |
end |
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127 |
|
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128 |
lemma zero_code_int_code [code, code_unfold]: |
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129 |
"(0\<Colon>code_int) = Numeral0" |
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130 |
by (simp add: number_of_code_int_def Pls_def) |
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131 |
lemma [code_post]: "Numeral0 = (0\<Colon>code_int)" |
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132 |
using zero_code_int_code .. |
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133 |
|
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134 |
lemma one_code_int_code [code, code_unfold]: |
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135 |
"(1\<Colon>code_int) = Numeral1" |
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136 |
by (simp add: number_of_code_int_def Pls_def Bit1_def) |
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137 |
lemma [code_post]: "Numeral1 = (1\<Colon>code_int)" |
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138 |
using one_code_int_code .. |
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|
139 |
|
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|
140 |
|
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141 |
definition div_mod_code_int :: "code_int \<Rightarrow> code_int \<Rightarrow> code_int \<times> code_int" where |
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142 |
[code del]: "div_mod_code_int n m = (n div m, n mod m)" |
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|
143 |
|
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144 |
lemma [code]: |
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"div_mod_code_int n m = (if m = 0 then (0, n) else (n div m, n mod m))" |
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146 |
unfolding div_mod_code_int_def by auto |
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147 |
|
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148 |
lemma [code]: |
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149 |
"n div m = fst (div_mod_code_int n m)" |
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150 |
unfolding div_mod_code_int_def by simp |
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151 |
|
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152 |
lemma [code]: |
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153 |
"n mod m = snd (div_mod_code_int n m)" |
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154 |
unfolding div_mod_code_int_def by simp |
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155 |
|
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156 |
lemma int_of_code [code]: |
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157 |
"int_of k = (if k = 0 then 0 |
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158 |
else (if k mod 2 = 0 then 2 * int_of (k div 2) else 2 * int_of (k div 2) + 1))" |
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|
159 |
proof - |
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160 |
have 1: "(int_of k div 2) * 2 + int_of k mod 2 = int_of k" |
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161 |
by (rule mod_div_equality) |
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162 |
have "int_of k mod 2 = 0 \<or> int_of k mod 2 = 1" by auto |
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163 |
from this show ?thesis |
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|
164 |
apply auto |
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165 |
apply (insert 1) by (auto simp add: mult_ac) |
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|
166 |
qed |
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|
167 |
|
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|
168 |
|
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169 |
code_instance code_numeral :: equal |
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170 |
(Haskell -) |
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|
171 |
|
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172 |
setup {* fold (Numeral.add_code @{const_name number_code_int_inst.number_of_code_int} |
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173 |
false Code_Printer.literal_numeral) ["Haskell"] *} |
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174 |
|
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175 |
code_const "0 \<Colon> code_int" |
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176 |
(Haskell "0") |
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|
177 |
|
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178 |
code_const "1 \<Colon> code_int" |
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179 |
(Haskell "1") |
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|
180 |
|
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181 |
code_const "minus \<Colon> code_int \<Rightarrow> code_int \<Rightarrow> code_int" |
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182 |
(Haskell "(_/ -/ _)") |
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|
183 |
|
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184 |
code_const div_mod_code_int |
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185 |
(Haskell "divMod") |
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186 |
|
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187 |
code_const "HOL.equal \<Colon> code_int \<Rightarrow> code_int \<Rightarrow> bool" |
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188 |
(Haskell infix 4 "==") |
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189 |
|
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190 |
code_const "op \<le> \<Colon> code_int \<Rightarrow> code_int \<Rightarrow> bool" |
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191 |
(Haskell infix 4 "<=") |
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|
192 |
|
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193 |
code_const "op < \<Colon> code_int \<Rightarrow> code_int \<Rightarrow> bool" |
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194 |
(Haskell infix 4 "<") |
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|
195 |
|
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196 |
code_type code_int |
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197 |
(Haskell "Int") |
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198 |
|
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199 |
code_abort of_int |
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200 |
|
41961
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201 |
subsubsection {* Narrowing's deep representation of types and terms *} |
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|
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203 |
datatype narrowing_type = SumOfProd "narrowing_type list list" |
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|
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205 |
datatype narrowing_term = Var "code_int list" narrowing_type | Ctr code_int "narrowing_term list" |
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206 |
datatype 'a cons = C narrowing_type "(narrowing_term list => 'a) list" |
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|
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208 |
subsubsection {* From narrowing's deep representation of terms to Code_Evaluation's terms *} |
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209 |
|
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210 |
class partial_term_of = typerep + |
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211 |
fixes partial_term_of :: "'a itself => narrowing_term => Code_Evaluation.term" |
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212 |
|
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213 |
lemma partial_term_of_anything: "partial_term_of x nt \<equiv> t" |
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214 |
by (rule eq_reflection) (cases "partial_term_of x nt", cases t, simp) |
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215 |
|
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216 |
|
41964
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|
217 |
subsubsection {* Auxilary functions for Narrowing *} |
41905 | 218 |
|
41908
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219 |
consts nth :: "'a list => code_int => 'a" |
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|
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221 |
code_const nth ("Haskell" infixl 9 "!!") |
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|
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|
223 |
consts error :: "char list => 'a" |
41905 | 224 |
|
225 |
code_const error ("Haskell" "error") |
|
226 |
||
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227 |
consts toEnum :: "code_int => char" |
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|
228 |
|
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229 |
code_const toEnum ("Haskell" "toEnum") |
41905 | 230 |
|
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231 |
consts map_index :: "(code_int * 'a => 'b) => 'a list => 'b list" |
41905 | 232 |
|
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233 |
consts split_At :: "code_int => 'a list => 'a list * 'a list" |
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|
234 |
|
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|
235 |
subsubsection {* Narrowing's basic operations *} |
41905 | 236 |
|
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237 |
type_synonym 'a narrowing = "code_int => 'a cons" |
41905 | 238 |
|
41961
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239 |
definition empty :: "'a narrowing" |
41905 | 240 |
where |
241 |
"empty d = C (SumOfProd []) []" |
|
242 |
||
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243 |
definition cons :: "'a => 'a narrowing" |
41905 | 244 |
where |
245 |
"cons a d = (C (SumOfProd [[]]) [(%_. a)])" |
|
246 |
||
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247 |
fun conv :: "(narrowing_term list => 'a) list => narrowing_term => 'a" |
41905 | 248 |
where |
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249 |
"conv cs (Var p _) = error (Char Nibble0 Nibble0 # map toEnum p)" |
41905 | 250 |
| "conv cs (Ctr i xs) = (nth cs i) xs" |
251 |
||
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252 |
fun nonEmpty :: "narrowing_type => bool" |
41905 | 253 |
where |
254 |
"nonEmpty (SumOfProd ps) = (\<not> (List.null ps))" |
|
255 |
||
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|
256 |
definition "apply" :: "('a => 'b) narrowing => 'a narrowing => 'b narrowing" |
41905 | 257 |
where |
258 |
"apply f a d = |
|
259 |
(case f d of C (SumOfProd ps) cfs => |
|
260 |
case a (d - 1) of C ta cas => |
|
261 |
let |
|
262 |
shallow = (d > 0 \<and> nonEmpty ta); |
|
263 |
cs = [(%xs'. (case xs' of [] => undefined | x # xs => cf xs (conv cas x))). shallow, cf <- cfs] |
|
264 |
in C (SumOfProd [ta # p. shallow, p <- ps]) cs)" |
|
265 |
||
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|
266 |
definition sum :: "'a narrowing => 'a narrowing => 'a narrowing" |
41905 | 267 |
where |
268 |
"sum a b d = |
|
269 |
(case a d of C (SumOfProd ssa) ca => |
|
270 |
case b d of C (SumOfProd ssb) cb => |
|
271 |
C (SumOfProd (ssa @ ssb)) (ca @ cb))" |
|
272 |
||
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|
273 |
lemma [fundef_cong]: |
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|
274 |
assumes "a d = a' d" "b d = b' d" "d = d'" |
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275 |
shows "sum a b d = sum a' b' d'" |
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|
276 |
using assms unfolding sum_def by (auto split: cons.split narrowing_type.split) |
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|
277 |
|
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|
278 |
lemma [fundef_cong]: |
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|
279 |
assumes "f d = f' d" "(\<And>d'. 0 <= d' & d' < d ==> a d' = a' d')" |
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280 |
assumes "d = d'" |
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|
281 |
shows "apply f a d = apply f' a' d'" |
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|
282 |
proof - |
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|
283 |
note assms moreover |
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|
284 |
have "int_of (of_int 0) < int_of d' ==> int_of (of_int 0) <= int_of (of_int (int_of d' - int_of (of_int 1)))" |
41912
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|
285 |
by (simp add: of_int_inverse) |
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|
286 |
moreover |
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|
287 |
have "int_of (of_int (int_of d' - int_of (of_int 1))) < int_of d'" |
41912
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|
288 |
by (simp add: of_int_inverse) |
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|
289 |
ultimately show ?thesis |
43047
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|
290 |
unfolding apply_def by (auto split: cons.split narrowing_type.split simp add: Let_def) |
41912
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|
291 |
qed |
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|
292 |
|
41908
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|
293 |
type_synonym pos = "code_int list" |
41912
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|
294 |
(* |
41908
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|
295 |
subsubsection {* Term refinement *} |
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|
296 |
|
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|
297 |
definition new :: "pos => type list list => term list" |
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|
298 |
where |
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|
299 |
"new p ps = map_index (%(c, ts). Ctr c (map_index (%(i, t). Var (p @ [i]) t) ts)) ps" |
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|
300 |
|
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|
301 |
fun refine :: "term => pos => term list" and refineList :: "term list => pos => (term list) list" |
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|
302 |
where |
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|
303 |
"refine (Var p (SumOfProd ss)) [] = new p ss" |
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|
304 |
| "refine (Ctr c xs) p = map (Ctr c) (refineList xs p)" |
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changeset
|
305 |
| "refineList xs (i # is) = (let (ls, xrs) = split_At i xs in (case xrs of x#rs => [ls @ y # rs. y <- refine x is]))" |
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changeset
|
306 |
|
3bd9a21366d2
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changeset
|
307 |
text {* Find total instantiations of a partial value *} |
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changeset
|
308 |
|
3bd9a21366d2
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|
309 |
function total :: "term => term list" |
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changeset
|
310 |
where |
3bd9a21366d2
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changeset
|
311 |
"total (Ctr c xs) = [Ctr c ys. ys <- map total xs]" |
3bd9a21366d2
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changeset
|
312 |
| "total (Var p (SumOfProd ss)) = [y. x <- new p ss, y <- total x]" |
3bd9a21366d2
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|
313 |
by pat_completeness auto |
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changeset
|
314 |
|
3bd9a21366d2
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bulwahn
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changeset
|
315 |
termination sorry |
41912
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|
316 |
*) |
41961
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|
317 |
subsubsection {* Narrowing generator type class *} |
41905 | 318 |
|
41961
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|
319 |
class narrowing = |
fdd37cfcd4a3
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changeset
|
320 |
fixes narrowing :: "code_int => 'a cons" |
41905 | 321 |
|
41961
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changeset
|
322 |
definition cons1 :: "('a::narrowing => 'b) => 'b narrowing" |
41905 | 323 |
where |
41961
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changeset
|
324 |
"cons1 f = apply (cons f) narrowing" |
41905 | 325 |
|
41961
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changeset
|
326 |
definition cons2 :: "('a :: narrowing => 'b :: narrowing => 'c) => 'c narrowing" |
41905 | 327 |
where |
41961
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changeset
|
328 |
"cons2 f = apply (apply (cons f) narrowing) narrowing" |
42021
52551c0a3374
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diff
changeset
|
329 |
|
52551c0a3374
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changeset
|
330 |
definition drawn_from :: "'a list => 'a cons" |
52551c0a3374
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41965
diff
changeset
|
331 |
where "drawn_from xs = C (SumOfProd (map (%_. []) xs)) (map (%x y. x) xs)" |
52551c0a3374
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diff
changeset
|
332 |
|
52551c0a3374
extending code_int type more; adding narrowing instance for type int; added test case for int instance
bulwahn
parents:
41965
diff
changeset
|
333 |
instantiation int :: narrowing |
52551c0a3374
extending code_int type more; adding narrowing instance for type int; added test case for int instance
bulwahn
parents:
41965
diff
changeset
|
334 |
begin |
52551c0a3374
extending code_int type more; adding narrowing instance for type int; added test case for int instance
bulwahn
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41965
diff
changeset
|
335 |
|
52551c0a3374
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diff
changeset
|
336 |
definition |
52551c0a3374
extending code_int type more; adding narrowing instance for type int; added test case for int instance
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41965
diff
changeset
|
337 |
"narrowing_int d = (let i = Quickcheck_Narrowing.int_of d in drawn_from [-i .. i])" |
52551c0a3374
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diff
changeset
|
338 |
|
52551c0a3374
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diff
changeset
|
339 |
instance .. |
52551c0a3374
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diff
changeset
|
340 |
|
52551c0a3374
extending code_int type more; adding narrowing instance for type int; added test case for int instance
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parents:
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diff
changeset
|
341 |
end |
52551c0a3374
extending code_int type more; adding narrowing instance for type int; added test case for int instance
bulwahn
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41965
diff
changeset
|
342 |
|
41961
fdd37cfcd4a3
renaming series and serial to narrowing in Quickcheck_Narrowing
bulwahn
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41943
diff
changeset
|
343 |
instantiation unit :: narrowing |
41905 | 344 |
begin |
345 |
||
346 |
definition |
|
41965
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bulwahn
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diff
changeset
|
347 |
"narrowing = cons ()" |
41905 | 348 |
|
349 |
instance .. |
|
350 |
||
351 |
end |
|
352 |
||
41961
fdd37cfcd4a3
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bulwahn
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changeset
|
353 |
instantiation bool :: narrowing |
41905 | 354 |
begin |
355 |
||
356 |
definition |
|
41965
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diff
changeset
|
357 |
"narrowing = sum (cons True) (cons False)" |
41905 | 358 |
|
359 |
instance .. |
|
360 |
||
361 |
end |
|
362 |
||
41961
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changeset
|
363 |
instantiation option :: (narrowing) narrowing |
41905 | 364 |
begin |
365 |
||
366 |
definition |
|
41965
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diff
changeset
|
367 |
"narrowing = sum (cons None) (cons1 Some)" |
41905 | 368 |
|
369 |
instance .. |
|
370 |
||
371 |
end |
|
372 |
||
41961
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bulwahn
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changeset
|
373 |
instantiation sum :: (narrowing, narrowing) narrowing |
41905 | 374 |
begin |
375 |
||
376 |
definition |
|
41961
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bulwahn
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41943
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changeset
|
377 |
"narrowing = sum (cons1 Inl) (cons1 Inr)" |
41905 | 378 |
|
379 |
instance .. |
|
380 |
||
381 |
end |
|
382 |
||
41961
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renaming series and serial to narrowing in Quickcheck_Narrowing
bulwahn
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41943
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changeset
|
383 |
instantiation list :: (narrowing) narrowing |
41905 | 384 |
begin |
385 |
||
41961
fdd37cfcd4a3
renaming series and serial to narrowing in Quickcheck_Narrowing
bulwahn
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41943
diff
changeset
|
386 |
function narrowing_list :: "'a list narrowing" |
41905 | 387 |
where |
41961
fdd37cfcd4a3
renaming series and serial to narrowing in Quickcheck_Narrowing
bulwahn
parents:
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diff
changeset
|
388 |
"narrowing_list d = sum (cons []) (apply (apply (cons Cons) narrowing) narrowing_list) d" |
41905 | 389 |
by pat_completeness auto |
390 |
||
41912
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changeset
|
391 |
termination proof (relation "measure nat_of") |
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|
392 |
qed (auto simp add: of_int_inverse nat_of_def) |
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|
393 |
|
41905 | 394 |
instance .. |
395 |
||
396 |
end |
|
397 |
||
41961
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changeset
|
398 |
instantiation nat :: narrowing |
41905 | 399 |
begin |
400 |
||
41961
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changeset
|
401 |
function narrowing_nat :: "nat narrowing" |
41905 | 402 |
where |
41961
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changeset
|
403 |
"narrowing_nat d = sum (cons 0) (apply (cons Suc) narrowing_nat) d" |
41905 | 404 |
by pat_completeness auto |
405 |
||
41912
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parents:
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changeset
|
406 |
termination proof (relation "measure nat_of") |
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parents:
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changeset
|
407 |
qed (auto simp add: of_int_inverse nat_of_def) |
41905 | 408 |
|
409 |
instance .. |
|
410 |
||
411 |
end |
|
412 |
||
41961
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parents:
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changeset
|
413 |
instantiation Enum.finite_1 :: narrowing |
41905 | 414 |
begin |
415 |
||
41961
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parents:
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changeset
|
416 |
definition narrowing_finite_1 :: "Enum.finite_1 narrowing" |
41905 | 417 |
where |
41961
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changeset
|
418 |
"narrowing_finite_1 = cons (Enum.finite_1.a\<^isub>1 :: Enum.finite_1)" |
41905 | 419 |
|
420 |
instance .. |
|
421 |
||
422 |
end |
|
423 |
||
41961
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changeset
|
424 |
instantiation Enum.finite_2 :: narrowing |
41905 | 425 |
begin |
426 |
||
41961
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parents:
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changeset
|
427 |
definition narrowing_finite_2 :: "Enum.finite_2 narrowing" |
41905 | 428 |
where |
41961
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parents:
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changeset
|
429 |
"narrowing_finite_2 = sum (cons (Enum.finite_2.a\<^isub>1 :: Enum.finite_2)) (cons (Enum.finite_2.a\<^isub>2 :: Enum.finite_2))" |
41905 | 430 |
|
431 |
instance .. |
|
432 |
||
433 |
end |
|
434 |
||
41961
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bulwahn
parents:
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changeset
|
435 |
instantiation Enum.finite_3 :: narrowing |
41905 | 436 |
begin |
437 |
||
41961
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parents:
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changeset
|
438 |
definition narrowing_finite_3 :: "Enum.finite_3 narrowing" |
41905 | 439 |
where |
41961
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parents:
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changeset
|
440 |
"narrowing_finite_3 = sum (cons (Enum.finite_3.a\<^isub>1 :: Enum.finite_3)) (sum (cons (Enum.finite_3.a\<^isub>2 :: Enum.finite_3)) (cons (Enum.finite_3.a\<^isub>3 :: Enum.finite_3)))" |
41905 | 441 |
|
442 |
instance .. |
|
443 |
||
444 |
end |
|
445 |
||
41961
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parents:
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changeset
|
446 |
instantiation Enum.finite_4 :: narrowing |
41910
709c04e7b703
adding serial instance of finite_4 in lazysmallcheck; changing code equations for implies
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parents:
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changeset
|
447 |
begin |
709c04e7b703
adding serial instance of finite_4 in lazysmallcheck; changing code equations for implies
bulwahn
parents:
41909
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changeset
|
448 |
|
41961
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renaming series and serial to narrowing in Quickcheck_Narrowing
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changeset
|
449 |
definition narrowing_finite_4 :: "Enum.finite_4 narrowing" |
41910
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parents:
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changeset
|
450 |
where |
41961
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parents:
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changeset
|
451 |
"narrowing_finite_4 = sum (cons Enum.finite_4.a\<^isub>1) (sum (cons Enum.finite_4.a\<^isub>2) (sum (cons Enum.finite_4.a\<^isub>3) (cons Enum.finite_4.a\<^isub>4)))" |
41910
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adding serial instance of finite_4 in lazysmallcheck; changing code equations for implies
bulwahn
parents:
41909
diff
changeset
|
452 |
|
709c04e7b703
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bulwahn
parents:
41909
diff
changeset
|
453 |
instance .. |
709c04e7b703
adding serial instance of finite_4 in lazysmallcheck; changing code equations for implies
bulwahn
parents:
41909
diff
changeset
|
454 |
|
709c04e7b703
adding serial instance of finite_4 in lazysmallcheck; changing code equations for implies
bulwahn
parents:
41909
diff
changeset
|
455 |
end |
709c04e7b703
adding serial instance of finite_4 in lazysmallcheck; changing code equations for implies
bulwahn
parents:
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changeset
|
456 |
|
41943 | 457 |
subsubsection {* class @{text is_testable} *} |
41905 | 458 |
|
41943 | 459 |
text {* The class @{text is_testable} ensures that all necessary type instances are generated. *} |
41905 | 460 |
|
461 |
class is_testable |
|
462 |
||
463 |
instance bool :: is_testable .. |
|
464 |
||
43047
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bulwahn
parents:
42980
diff
changeset
|
465 |
instance "fun" :: ("{term_of, narrowing, partial_term_of}", is_testable) is_testable .. |
41905 | 466 |
|
467 |
definition ensure_testable :: "'a :: is_testable => 'a :: is_testable" |
|
468 |
where |
|
469 |
"ensure_testable f = f" |
|
470 |
||
41910
709c04e7b703
adding serial instance of finite_4 in lazysmallcheck; changing code equations for implies
bulwahn
parents:
41909
diff
changeset
|
471 |
declare simp_thms(17,19)[code del] |
709c04e7b703
adding serial instance of finite_4 in lazysmallcheck; changing code equations for implies
bulwahn
parents:
41909
diff
changeset
|
472 |
|
42022
101ce92333f4
adding a simple datatype for representing functions in Quickcheck_Narrowing
bulwahn
parents:
42021
diff
changeset
|
473 |
subsubsection {* Defining a simple datatype to represent functions in an incomplete and redundant way *} |
101ce92333f4
adding a simple datatype for representing functions in Quickcheck_Narrowing
bulwahn
parents:
42021
diff
changeset
|
474 |
|
101ce92333f4
adding a simple datatype for representing functions in Quickcheck_Narrowing
bulwahn
parents:
42021
diff
changeset
|
475 |
datatype ('a, 'b) ffun = Constant 'b | Update 'a 'b "('a, 'b) ffun" |
101ce92333f4
adding a simple datatype for representing functions in Quickcheck_Narrowing
bulwahn
parents:
42021
diff
changeset
|
476 |
|
101ce92333f4
adding a simple datatype for representing functions in Quickcheck_Narrowing
bulwahn
parents:
42021
diff
changeset
|
477 |
primrec eval_ffun :: "('a, 'b) ffun => 'a => 'b" |
101ce92333f4
adding a simple datatype for representing functions in Quickcheck_Narrowing
bulwahn
parents:
42021
diff
changeset
|
478 |
where |
101ce92333f4
adding a simple datatype for representing functions in Quickcheck_Narrowing
bulwahn
parents:
42021
diff
changeset
|
479 |
"eval_ffun (Constant c) x = c" |
101ce92333f4
adding a simple datatype for representing functions in Quickcheck_Narrowing
bulwahn
parents:
42021
diff
changeset
|
480 |
| "eval_ffun (Update x' y f) x = (if x = x' then y else eval_ffun f x)" |
101ce92333f4
adding a simple datatype for representing functions in Quickcheck_Narrowing
bulwahn
parents:
42021
diff
changeset
|
481 |
|
101ce92333f4
adding a simple datatype for representing functions in Quickcheck_Narrowing
bulwahn
parents:
42021
diff
changeset
|
482 |
hide_type (open) ffun |
101ce92333f4
adding a simple datatype for representing functions in Quickcheck_Narrowing
bulwahn
parents:
42021
diff
changeset
|
483 |
hide_const (open) Constant Update eval_ffun |
101ce92333f4
adding a simple datatype for representing functions in Quickcheck_Narrowing
bulwahn
parents:
42021
diff
changeset
|
484 |
|
42024
51df23535105
handling a quite restricted set of functions in Quickcheck_Narrowing by an easy transformation
bulwahn
parents:
42022
diff
changeset
|
485 |
datatype 'b cfun = Constant 'b |
51df23535105
handling a quite restricted set of functions in Quickcheck_Narrowing by an easy transformation
bulwahn
parents:
42022
diff
changeset
|
486 |
|
51df23535105
handling a quite restricted set of functions in Quickcheck_Narrowing by an easy transformation
bulwahn
parents:
42022
diff
changeset
|
487 |
primrec eval_cfun :: "'b cfun => 'a => 'b" |
51df23535105
handling a quite restricted set of functions in Quickcheck_Narrowing by an easy transformation
bulwahn
parents:
42022
diff
changeset
|
488 |
where |
51df23535105
handling a quite restricted set of functions in Quickcheck_Narrowing by an easy transformation
bulwahn
parents:
42022
diff
changeset
|
489 |
"eval_cfun (Constant c) y = c" |
51df23535105
handling a quite restricted set of functions in Quickcheck_Narrowing by an easy transformation
bulwahn
parents:
42022
diff
changeset
|
490 |
|
51df23535105
handling a quite restricted set of functions in Quickcheck_Narrowing by an easy transformation
bulwahn
parents:
42022
diff
changeset
|
491 |
hide_type (open) cfun |
51df23535105
handling a quite restricted set of functions in Quickcheck_Narrowing by an easy transformation
bulwahn
parents:
42022
diff
changeset
|
492 |
hide_const (open) Constant eval_cfun |
51df23535105
handling a quite restricted set of functions in Quickcheck_Narrowing by an easy transformation
bulwahn
parents:
42022
diff
changeset
|
493 |
|
51df23535105
handling a quite restricted set of functions in Quickcheck_Narrowing by an easy transformation
bulwahn
parents:
42022
diff
changeset
|
494 |
subsubsection {* Setting up the counterexample generator *} |
51df23535105
handling a quite restricted set of functions in Quickcheck_Narrowing by an easy transformation
bulwahn
parents:
42022
diff
changeset
|
495 |
|
51df23535105
handling a quite restricted set of functions in Quickcheck_Narrowing by an easy transformation
bulwahn
parents:
42022
diff
changeset
|
496 |
use "~~/src/HOL/Tools/Quickcheck/narrowing_generators.ML" |
51df23535105
handling a quite restricted set of functions in Quickcheck_Narrowing by an easy transformation
bulwahn
parents:
42022
diff
changeset
|
497 |
|
51df23535105
handling a quite restricted set of functions in Quickcheck_Narrowing by an easy transformation
bulwahn
parents:
42022
diff
changeset
|
498 |
setup {* Narrowing_Generators.setup *} |
51df23535105
handling a quite restricted set of functions in Quickcheck_Narrowing by an easy transformation
bulwahn
parents:
42022
diff
changeset
|
499 |
|
43047
26774ccb1c74
automatic derivation of partial_term_of functions; renaming type and term to longer names narrowing_type and narrowing_term; hiding constant C; adding overlord option
bulwahn
parents:
42980
diff
changeset
|
500 |
hide_type (open) code_int narrowing_type narrowing_term cons |
42024
51df23535105
handling a quite restricted set of functions in Quickcheck_Narrowing by an easy transformation
bulwahn
parents:
42022
diff
changeset
|
501 |
hide_const (open) int_of of_int nth error toEnum map_index split_At empty |
43047
26774ccb1c74
automatic derivation of partial_term_of functions; renaming type and term to longer names narrowing_type and narrowing_term; hiding constant C; adding overlord option
bulwahn
parents:
42980
diff
changeset
|
502 |
C cons conv nonEmpty "apply" sum cons1 cons2 ensure_testable |
42022
101ce92333f4
adding a simple datatype for representing functions in Quickcheck_Narrowing
bulwahn
parents:
42021
diff
changeset
|
503 |
|
41905 | 504 |
end |