From 516867784dd75cffc89686f34c349ea485b7cbdd Mon Sep 17 00:00:00 2001
From: Ian Piumarta <piumarta@zora-10.local>
Date: Wed, 22 Mar 2023 17:15:12 +0900
Subject: [PATCH] Add global parsimony variables to track struct/union/enum
 declarations.

---
 src/ccmeta.leg | 50 +++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 47 insertions(+), 3 deletions(-)

diff --git a/src/ccmeta.leg b/src/ccmeta.leg
index 2a62e60..f710b4c 100644
--- a/src/ccmeta.leg
+++ b/src/ccmeta.leg
@@ -3,7 +3,7 @@
 # Copyright (c) 2016-2021 Ian Piumarta and other contributors (see AUTHORS)
 # All rights reserved (see LICENSE)
 #
-# Last edited: 2023-03-22 17:03:00 by piumarta on zora-10.local
+# Last edited: 2023-03-22 17:14:46 by piumarta on zora-10.local
 
 %{
 /* compile:	leg -o ccmeta.c ccmeta.leg
@@ -101,8 +101,16 @@ jb_record *jbs= NULL;
     assert(jbs == &jbrec);			\
     jbs= jbrec.next
 
-// this is the global scope
+// this is the global scope and other global variable for parsimony lang
 oop globals= 0;
+oop program      = 0;
+oop prog_last    = 0;
+oop prog_unions  = 0;
+oop prog_enums   = 0;
+oop prog_structs = 0;
+oop union_last   = 0;
+oop enum_last    = 0;
+oop struct_last  = 0;
 
 #define DO_SYMBOLS()                                                                                    \
      DO_PROTOS() _DO(__proto__) _DO(__name__) _DO(__default__) _DO(__arguments__)                       \
@@ -123,7 +131,7 @@ oop globals= 0;
     _DO(rlparen) _DO(rrparen) _DO(attributeL) _DO(attributeTok) _DO(typeOfTok) _DO(asmTok) _DO(element) \
     _DO(volatileTok) _DO(gotoTok) _DO(declarationL) _DO(compoundS) _DO(switchTok) _DO(continueTok)      \
     _DO(breakTok) _DO(returnTok) _DO(caseTok) _DO(defaultTok) _DO(attribute1) _DO(attribute2)           \
-    _DO(structTok) _DO(enumList) _DO(enumTok)
+    _DO(structTok) _DO(enumList) _DO(enumTok) _DO(last)
 
 
 #define _DO(NAME) oop NAME##_symbol;
@@ -835,6 +843,16 @@ oop new_C_structSpec(oop structTok, oop attributeSpecifier1, oop id, oop leftCur
     map_set(object, declarationL_symbol,declarationList);
     map_set(object, rightCurly_symbol,  rightCurly);
     map_set(object, attribute2_symbol,  attributeSpecifier2);
+    // remember this declaration in program.unions or program.structs and their .last members
+    if (strcmp(get(map_get(structTok, text_symbol), String, value), "union") == 0 ) {
+      if (id != null) map_set(prog_unions, map_get(id, identifier_symbol), object);
+      map_set(prog_unions, last_symbol, object);
+    } else {
+      if (id != null) map_set(prog_structs, map_get(id, identifier_symbol), object);
+      map_set(prog_structs, last_symbol, object);
+    }
+    // remember this declaration in program.last
+    map_set(program, last_symbol, object);
     return object;
 }
 
@@ -853,6 +871,11 @@ oop new_C_enumSpec(oop enumTok, oop id, oop leftCurly, oop enumeratorList, oop r
     map_set(object, leftCurly_symbol,   leftCurly);
     map_set(object, enumList_symbol,    enumeratorList);
     map_set(object, rightCurly_symbol,  rightCurly);
+    if (id != null) {
+      map_set(prog_enums, map_get(id, identifier_symbol), object);
+    }
+    map_set(prog_enums, last_symbol, object);
+    map_set(program, last_symbol, object);
     return object;
 }
 
@@ -4668,6 +4691,27 @@ void init(void)
     DO_PROTOS()
     #undef _DO
 
+    // Initialisation of parsimony global variable
+    program      = makeMap();
+    prog_enums   = makeMap();
+    prog_structs = makeMap();
+    prog_unions  = makeMap();
+    prog_last    = makeMap();
+    enum_last    = makeMap();
+    struct_last  = makeMap();
+    union_last   = makeMap();
+
+    map_set(globals     , intern("program"), program     );
+
+    map_set(program     , intern("structs"), prog_structs);
+    map_set(prog_structs, intern("last"   ), struct_last );
+
+    map_set(program     , intern("unions" ), prog_unions );
+    map_set(prog_unions , intern("last"   ), union_last  );
+
+    map_set(program     , intern("enums"  ), prog_enums  );
+    map_set(prog_enums  , intern("last"   ), enum_last   );
+
     fixScope(globals);
 
     /* File scope */