author | blanchet |
Thu, 12 Jun 2014 01:00:49 +0200 | |
changeset 57229 | 489083abce44 |
parent 56078 | 624faeda77b5 |
child 57704 | c0da3fc313e3 |
permissions | -rw-r--r-- |
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(* Title: HOL/Tools/SMT2/smtlib2.ML |
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Author: Sascha Boehme, TU Muenchen |
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Parsing and generating SMT-LIB 2. |
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*) |
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signature SMTLIB2 = |
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sig |
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exception PARSE of int * string |
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datatype tree = |
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Num of int | |
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Dec of int * int | |
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Str of string | |
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Sym of string | |
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Key of string | |
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S of tree list |
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val parse: string list -> tree |
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val pretty_tree: tree -> Pretty.T |
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val str_of: tree -> string |
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end; |
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structure SMTLIB2: SMTLIB2 = |
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struct |
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(* data structures *) |
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exception PARSE of int * string |
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datatype tree = |
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Num of int | |
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Dec of int * int | |
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Str of string | |
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Sym of string | |
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Key of string | |
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S of tree list |
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datatype unfinished = None | String of string | Symbol of string |
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(* utilities *) |
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fun read_raw pred l cs = |
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(case take_prefix pred cs of |
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([], []) => raise PARSE (l, "empty token") |
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| ([], c :: _) => raise PARSE (l, "unexpected character " ^ quote c) |
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| x => x) |
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(* numerals and decimals *) |
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fun int_of cs = fst (read_int cs) |
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fun read_num l cs = |
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(case read_raw Symbol.is_ascii_digit l cs of |
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(cs1, "." :: cs') => |
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let val (cs2, cs'') = read_raw Symbol.is_ascii_digit l cs' |
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in (Dec (int_of cs1, int_of cs2), cs'') end |
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| (cs1, cs2) => (Num (int_of cs1), cs2)) |
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(* binary numbers *) |
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fun is_bin c = (c = "0" orelse c = "1") |
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fun read_bin l cs = read_raw is_bin l cs |>> Num o fst o read_radix_int 2 |
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(* hex numbers *) |
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val is_hex = member (op =) (raw_explode "0123456789abcdefABCDEF") |
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fun within c1 c2 c = (ord c1 <= ord c andalso ord c <= ord c2) |
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fun unhex i [] = i |
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| unhex i (c :: cs) = |
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if within "0" "9" c then unhex (i * 16 + (ord c - ord "0")) cs |
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else if within "a" "f" c then unhex (i * 16 + (ord c - ord "a" + 10)) cs |
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else if within "A" "F" c then unhex (i * 16 + (ord c - ord "A" + 10)) cs |
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else raise Fail ("bad hex character " ^ quote c) |
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fun read_hex l cs = read_raw is_hex l cs |>> Num o unhex 0 |
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(* symbols *) |
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val symbol_chars = raw_explode "~!@$%^&*_+=<>.?/-" |
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fun is_sym c = |
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Symbol.is_ascii_letter c orelse |
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Symbol.is_ascii_digit c orelse |
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member (op =) symbol_chars c |
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fun read_sym f l cs = read_raw is_sym l cs |>> f o implode |
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(* quoted tokens *) |
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fun read_quoted stop (escape, replacement) cs = |
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let |
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fun read _ [] = NONE |
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| read rs (cs as (c :: cs')) = |
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if is_prefix (op =) stop cs then |
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SOME (implode (rev rs), drop (length stop) cs) |
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else if not (null escape) andalso is_prefix (op =) escape cs then |
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read (replacement :: rs) (drop (length escape) cs) |
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else read (c :: rs) cs' |
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in read [] cs end |
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fun read_string cs = read_quoted ["\\", "\""] (["\\", "\\"], "\\") cs |
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fun read_symbol cs = read_quoted ["|"] ([], "") cs |
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(* core parser *) |
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fun read _ [] rest tss = (rest, tss) |
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| read l ("(" :: cs) None tss = read l cs None ([] :: tss) |
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| read l (")" :: cs) None (ts1 :: ts2 :: tss) = |
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read l cs None ((S (rev ts1) :: ts2) :: tss) |
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| read l ("#" :: "x" :: cs) None (ts :: tss) = |
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token read_hex l cs ts tss |
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| read l ("#" :: cs) None (ts :: tss) = |
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token read_bin l cs ts tss |
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| read l (":" :: cs) None (ts :: tss) = |
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token (read_sym Key) l cs ts tss |
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| read l ("\"" :: cs) None (ts :: tss) = |
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quoted read_string String Str l "" cs ts tss |
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| read l ("|" :: cs) None (ts :: tss) = |
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quoted read_symbol Symbol Sym l "" cs ts tss |
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| read l ((c as "!") :: cs) None (ts :: tss) = |
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token (fn _ => pair (Sym c)) l cs ts tss |
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| read l (c :: cs) None (ts :: tss) = |
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if Symbol.is_ascii_blank c then read l cs None (ts :: tss) |
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else if Symbol.is_digit c then token read_num l (c :: cs) ts tss |
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else token (read_sym Sym) l (c :: cs) ts tss |
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135 |
| read l cs (String s) (ts :: tss) = |
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quoted read_string String Str l s cs ts tss |
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137 |
| read l cs (Symbol s) (ts :: tss) = |
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138 |
quoted read_symbol Symbol Sym l s cs ts tss |
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139 |
| read l _ _ [] = raise PARSE (l, "bad parser state") |
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140 |
|
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and token f l cs ts tss = |
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let val (t, cs') = f l cs |
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in read l cs' None ((t :: ts) :: tss) end |
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144 |
|
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and quoted r f g l s cs ts tss = |
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146 |
(case r cs of |
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NONE => (f (s ^ implode cs), ts :: tss) |
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148 |
| SOME (s', cs') => read l cs' None ((g (s ^ s') :: ts) :: tss)) |
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149 |
|
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150 |
|
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151 |
|
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152 |
(* overall parser *) |
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153 |
|
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154 |
fun read_line l line = read l (raw_explode line) |
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155 |
|
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156 |
fun add_line line (l, (None, tss)) = |
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157 |
if size line = 0 orelse nth_string line 0 = ";" then (l + 1, (None, tss)) |
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158 |
else (l + 1, read_line l line None tss) |
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159 |
| add_line line (l, (unfinished, tss)) = |
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160 |
(l + 1, read_line l line unfinished tss) |
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161 |
|
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162 |
fun finish (_, (None, [[t]])) = t |
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163 |
| finish (l, _) = raise PARSE (l, "bad nesting") |
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164 |
|
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165 |
fun parse lines = finish (fold add_line lines (1, (None, [[]]))) |
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166 |
|
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167 |
|
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168 |
(* pretty printer *) |
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169 |
|
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170 |
fun pretty_tree (Num i) = Pretty.str (string_of_int i) |
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171 |
| pretty_tree (Dec (i, j)) = |
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172 |
Pretty.str (string_of_int i ^ "." ^ string_of_int j) |
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173 |
| pretty_tree (Str s) = |
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174 |
raw_explode s |
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175 |
|> maps (fn "\"" => ["\\", "\""] | "\\" => ["\\", "\\"] | c => [c]) |
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176 |
|> implode |
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177 |
|> enclose "\"" "\"" |
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178 |
|> Pretty.str |
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179 |
| pretty_tree (Sym s) = |
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180 |
if String.isPrefix "(" s (* for bit vector functions *) orelse |
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181 |
forall is_sym (raw_explode s) then |
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182 |
Pretty.str s |
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183 |
else |
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184 |
Pretty.str ("|" ^ s ^ "|") |
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185 |
| pretty_tree (Key s) = Pretty.str (":" ^ s) |
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186 |
| pretty_tree (S trees) = |
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187 |
Pretty.enclose "(" ")" (Pretty.separate "" (map pretty_tree trees)) |
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188 |
|
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189 |
val str_of = Pretty.str_of o pretty_tree |
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190 |
|
57229 | 191 |
end; |