Fixed some problems:

files that use the em_code module must include the em_code.h file
improved checking of definitions after use
fixed problem with ranges in case statements

lang/m2/comp/Makefile

@@ -183,7 +183,7 @@ error.o: input.h
 error.o: inputtype.h
 error.o: main.h
 error.o: node.h
-error.o: squeeze.h
+error.o: nostrict.h
 error.o: strict3rd.h
 error.o: warning.h
 main.o: LLlex.h
@@ -221,6 +221,7 @@ type.o: def.h
 type.o: idf.h
 type.o: nocross.h
 type.o: node.h
+type.o: nostrict.h
 type.o: scope.h
 type.o: squeeze.h
 type.o: target_sizes.h
@@ -316,8 +317,8 @@ chk_expr.o: main.h
 chk_expr.o: misc.h
 chk_expr.o: nocross.h
 chk_expr.o: node.h
+chk_expr.o: nostrict.h
 chk_expr.o: scope.h
-chk_expr.o: squeeze.h
 chk_expr.o: standards.h
 chk_expr.o: strict3rd.h
 chk_expr.o: target_sizes.h
@@ -326,7 +327,7 @@ chk_expr.o: warning.h
 options.o: idfsize.h
 options.o: main.h
 options.o: nocross.h
-options.o: squeeze.h
+options.o: nostrict.h
 options.o: strict3rd.h
 options.o: target_sizes.h
 options.o: type.h
@@ -416,8 +417,8 @@ declar.o: main.h
 declar.o: misc.h
 declar.o: nocross.h
 declar.o: node.h
+declar.o: nostrict.h
 declar.o: scope.h
-declar.o: squeeze.h
 declar.o: strict3rd.h
 declar.o: target_sizes.h
 declar.o: type.h

lang/m2/comp/Version.c

@@ -1 +1 @@
-static char Version[] = "ACK Modula-2 compiler Version 0.25";
+static char Version[] = "ACK Modula-2 compiler Version 0.26";

lang/m2/comp/casestat.C

@@ -238,10 +238,13 @@ AddCases(sh, node, lbl)
 			assert(node->nd_right->nd_class == Value);
 
 			node->nd_type = node->nd_left->nd_type;
-			for (node->nd_INT = node->nd_left->nd_INT;
-			     node->nd_INT != node->nd_right->nd_INT;
-			     node->nd_INT++) {
+			node->nd_INT = node->nd_left->nd_INT;
+			for (;;) {
 				if (! AddOneCase(sh, node, lbl)) return 0;
+			        if (node->nd_INT == node->nd_right->nd_INT) {
+					break;
+				}
+			     	node->nd_INT++;
 			}
 			return 1;
 		}

lang/m2/comp/chk_expr.c

@@ -266,7 +266,7 @@ ChkLinkOrName(expp, flags)
 			return 0;
 		}
 
-		if (!(df = lookup(expp->nd_IDF, left->nd_type->rec_scope, 1, flags))) {
+		if (!(df = lookup(expp->nd_IDF, left->nd_type->rec_scope, D_IMPORTED, flags))) {
 			id_not_declared(expp);
 			return 0;
 		}

lang/m2/comp/def.c

@@ -14,6 +14,7 @@
 #include	<alloc.h>
 #include	<em_arith.h>
 #include	<em_label.h>
+#include	<em_code.h>
 #include	<assert.h>
 
 #include	"LLlex.h"
@@ -96,14 +97,9 @@ define(id, scope, kind)
 	*/
 	register t_def *df;
 
-	df = lookup(id, scope, 2, 0);
+	df = lookup(id, scope, D_IMPORT, 0);
 	if (	/* Already in this scope */
 		df
-	   ||	/* A closed scope, and id defined in the pervasive scope */
-		( 
-		  scopeclosed(scope)
-		&&
-		  (df = lookup(id, PervasiveScope, 2, 0)))
 	   ) {
 		switch(df->df_kind) {
 		case D_INUSE:
@@ -265,7 +261,7 @@ DeclProc(type, id)
 	else {
 		char *name;
 
-		df = lookup(id, CurrentScope, 1, 0);
+		df = lookup(id, CurrentScope, D_IMPORTED, 0);
 		if (df && df->df_kind == D_PROCHEAD) {
 			/* C_exp already generated when we saw the definition
 			   in the definition module

lang/m2/comp/defmodule.c

@@ -97,14 +97,14 @@ GetDefinitionModule(id, incr)
 	t_scope *newsc = CurrentScope;
 
 	level += incr;
-	df = lookup(id, GlobalScope, 1, 0);
+	df = lookup(id, GlobalScope, D_IMPORTED, 0);
 	if (!df) {
 		/* Read definition module. Make an exception for SYSTEM.
 		*/
 		DefId = id;
 		if (!strcmp(id->id_text, "SYSTEM")) {
 			do_SYSTEM();
-			df = lookup(id, GlobalScope, 1, 0);
+			df = lookup(id, GlobalScope, D_IMPORTED, 0);
 		}
 		else {
 			extern int ForeignFlag;
@@ -115,7 +115,7 @@ GetDefinitionModule(id, incr)
 			if (!is_anon_idf(id) && GetFile(id->id_text)) {
 
 				DefModule();
-				df = lookup(id, GlobalScope, 1, 0);
+				df = lookup(id, GlobalScope, D_IMPORTED, 0);
 				if (level == 1 &&
 				    (!df || !(df->df_flags & D_FOREIGN))) {
 					/* The module is directly imported by
@@ -137,7 +137,7 @@ GetDefinitionModule(id, incr)
 				}
 			}
 			else {
-				df = lookup(id, GlobalScope, 1, 0);
+				df = lookup(id, GlobalScope, D_IMPORTED, 0);
 				newsc->sc_name = id->id_text;
 			}
 			vis = CurrVis;

lang/m2/comp/enter.c

@@ -129,7 +129,7 @@ EnterVarList(Idlist, type, local)
 	for (; idlist; idlist = idlist->nd_right) {
 		df = define(idlist->nd_IDF, CurrentScope, D_VARIABLE);
 		df->df_type = type;
-		df->df_flags &= ~(D_USED | D_DEFINED);
+		/* df->df_flags &= ~(D_USED | D_DEFINED); */
 		if (idlist->nd_left) {
 			/* An address was supplied
 			*/
@@ -382,7 +382,9 @@ EnterExportList(Idlist, qualified)
 			   scope imports it.
 			*/
 			df1 = lookup(idlist->nd_IDF,
-				     enclosing(CurrVis)->sc_scope, 1, 0);
+				     enclosing(CurrVis)->sc_scope,
+				     D_IMPORTED,
+				     0);
 			if (df1) {
 				/* It was already defined in the enclosing
 				   scope. There are two legal possibilities,

lang/m2/comp/error.c

@@ -20,6 +20,7 @@
 #include	<system.h>
 #include	<em_arith.h>
 #include	<em_label.h>
+#include	<em_code.h>
 
 #include	"strict3rd.h"
 #include	"input.h"

lang/m2/comp/lookup.c

@@ -44,6 +44,12 @@ lookup(id, scope, import, flags)
 	     df && df->df_scope != scope;
 	     df1 = df, df = df->df_next) { /* nothing */ }
 
+	if (! df && import && scopeclosed(scope)) {
+		for (df = id->id_def, df1 = 0;
+		     df && df->df_scope != PervasiveScope;
+		     df1 = df, df = df->df_next) { /* nothing */ }
+	}
+
 	if (df) {
 		/* Found it
 		*/
@@ -55,14 +61,11 @@ lookup(id, scope, import, flags)
 			id->id_def = df;
 		}
 		df->df_flags |= flags;
-		if (import) {
-			while (df->df_kind & D_IMPORTED) {
-				if (df->df_kind == D_INUSE && import != 1) break;
+		while (df->df_kind & import) {
 			assert(df->imp_def != 0);
 			df = df->imp_def;
 		}
 	}
-	}
 	return df;
 }
 
@@ -79,14 +82,16 @@ lookfor(id, vis, message, flags)
 	t_def *df;
 
 	while (sc) {
-		df = lookup(id->nd_IDF, sc->sc_scope, 1, flags);
+		df = lookup(id->nd_IDF, sc->sc_scope, D_IMPORTED, flags);
 		if (df) {
-			if (pass_1 &&
-			    message && 
-			    sc->sc_scope->sc_level < vis->sc_scope->sc_level &&
-			    ! scopeclosed(vis->sc_scope)) {
-				define(id->nd_IDF, vis->sc_scope, D_INUSE)->
-					imp_def = df;
+			if (pass_1 && message) {
+				while (vis->sc_scope->sc_level >
+				       sc->sc_scope->sc_level) {
+					define( id->nd_IDF,
+						vis->sc_scope,
+						D_INUSE)-> imp_def = df;
+					vis = nextvisible(vis);
+				}
 			}
 			return df;
 		}

lang/m2/comp/main.c

@@ -14,6 +14,7 @@
 #include	<system.h>
 #include	<em_arith.h>
 #include	<em_label.h>
+#include	<em_code.h>
 #include	<alloc.h>
 
 #include	"strict3rd.h"

lang/m2/comp/scope.C

@@ -49,7 +49,6 @@ open_scope(scopetype)
 	if (scopetype == OPENSCOPE) {
 		ls->sc_next = ls->sc_encl;
 	}
-	else	ls->sc_next = PervVis;
 	CurrVis = ls;
 }
 

lang/m2/comp/tmpvar.C

@@ -20,6 +20,7 @@
 
 #include	<em_arith.h>
 #include	<em_label.h>
+#include	<em_code.h>
 #include	<em_reg.h>
 #include	<alloc.h>
 #include	<assert.h>

lang/m2/comp/type.c

@@ -623,7 +623,7 @@ type_or_forward(ptp)
 	register t_node *nd;
 	register t_def *df, *df1;
 
-	if ((df1 = lookup(dot.TOK_IDF, CurrentScope, 1, D_USED))) {
+	if ((df1 = lookup(dot.TOK_IDF, CurrentScope, D_IMPORTED, D_USED))) {
 		/* Either a Module or a Type, but in both cases defined
 		   in this scope, so this is the correct identification
 		*/