hoa: allow dots in identifiers

As discussed at https://github.com/adl/hoaf/issues/56

* src/parseaut/scanaut.ll: Allow dots.
* src/tests/parseaut.test: Test it.
* NEWS: Mention it.

NEWS

@@ -78,6 +78,10 @@ New in spot 1.99.5a (not yet released)
     in the HOA format, and furthermore the parse_aut() function now
     has an option to read HOA file and produce them as kripke_graph.
 
+  * The HOA parser now accepts identifier, aliases, and headernames
+    containing dots, as this will be allowed in the next version of
+    the HOA format.
+
   * Renamings:
     is_guarantee_automaton() -> is_terminal_automaton()
     tgba_run -> twa_run
@@ -90,7 +94,7 @@ New in spot 1.99.5a (not yet released)
   * Better interface for sat_minimize().
 
   Bug fixes:
-  * automaton parser was ignoring the "unambiguous" property.
+  * the HOA parser was ignoring the "unambiguous" property.
   * --dot=Bb should work like --dot=b, allowing us to disable
     a B option set via an environment variable.
 

src/parseaut/scanaut.ll

@@ -44,7 +44,7 @@ static unsigned lbtt_states = 0;
 eol         \n+|\r+
 eol2        (\n\r)+|(\r\n)+
 eols        ({eol}|{eol2})*
-identifier  [[:alpha:]_][[:alnum:]_-]*
+identifier  [[:alpha:]_][[:alnum:]_.-]*
 
 %x in_COMMENT in_STRING in_NEVER_PAR
 %s in_HOA in_NEVER in_LBTT_HEADER
@@ -131,7 +131,7 @@ identifier  [[:alpha:]_][[:alnum:]_-]*
 			   yylval->str = new std::string(yytext, yyleng - 1);
 			   return token::HEADERNAME;
 			}
-  "@"[[:alnum:]_-]+     {
+  "@"[[:alnum:]_.-]+     {
 			   yylval->str = new std::string(yytext + 1, yyleng - 1);
 			   return token::ANAME;
 			}

src/tests/parseaut.test

@@ -253,7 +253,7 @@ HOA: v2
 HOA: w1
 --BODY--
 --END--
-HOA: v1_1
+HOA: v1.1
 --BODY--
 --END--
 EOF
@@ -266,7 +266,7 @@ input:12.6-7: unsupported HOA version
 input:12.1-7: missing 'Acceptance:' header
 input:15.6-7: unknown HOA version
 input:15.1-7: missing 'Acceptance:' header
-input:18.6-9: we can read HOA v1 but this file uses v1_1; $t
+input:18.6-9: we can read HOA v1 but this file uses v1.1; $t
 input:18.1-9: missing 'Acceptance:' header
 EOF
 
@@ -478,7 +478,7 @@ input:17.11-13: unknown alias @bc
 EOF
 
 cat >input <<EOF
-    HOA: v1
+    HOA: v1.1
     name: "GFa & GF(b & c)"
     States: 1
     Start: 0
@@ -486,13 +486,13 @@ cat >input <<EOF
     Acceptance: 2 (Inf(0) & Inf(1))
     AP: 3 "a" "b" "c"
     Alias: @a 0
-    Alias: @bc 1 & 2
+    Alias: @b.c 1 & 2
     --BODY--
     State: 0
-    [!@a & !@bc] 0
-    [@a & !@bc]  0 {0}
-    [!@a & @bc]  0 {1}
-    [@a & @bc]   0 {0 1}
+    [!@a & !@b.c] 0
+    [@a & !@b.c]  0 {0}
+    [!@a & @b.c]  0 {1}
+    [@a & @b.c]   0 {0 1}
     --END--
 /* Some comment */
 HOA: v1