empty IMPORTS section is allowed

libasn1parser/asn1p_y.y

@@ -250,6 +250,7 @@ static asn1p_module_t *currentModule;
 %type	<a_module>		optImports
 %type	<a_module>		optExports
 %type	<a_module>		ImportsDefinition
+%type	<a_module>		optImportsBundleSet
 %type	<a_module>		ImportsBundleSet
 %type	<a_xports>		ImportsBundle
 %type	<a_xports>		ImportsList
@@ -606,7 +607,7 @@ optImports:
 	| ImportsDefinition;
 
 ImportsDefinition:
-	TOK_IMPORTS ImportsBundleSet ';' {
+	TOK_IMPORTS optImportsBundleSet ';' {
 		if(!saved_aid && 0)
 			return yyerror("Unterminated IMPORTS FROM, "
 					"expected semicolon ';'");
@@ -621,6 +622,10 @@ ImportsDefinition:
 	}
 	;
 
+optImportsBundleSet:
+	{ $$ = asn1p_module_new(); }
+	| ImportsBundleSet;
+
 ImportsBundleSet:
 	ImportsBundle {
 		$$ = asn1p_module_new();

tests/121-empty-imports-OK.asn1

+
+-- OK: Everything is fine
+
+-- iso.org.dod.internet.private.enterprise (1.3.6.1.4.1)
+-- .spelio.software.asn1c.test (9363.1.5.1)
+-- .121
+
+ModuleEmptyIMPORTS
+	{ iso org(3) dod(6) internet (1) private(4) enterprise(1)
+		spelio(9363) software(1) asn1c(5) test(1) 121 }
+	DEFINITIONS AUTOMATIC TAGS ::=
+BEGIN
+
+	IMPORTS -- nothing --;
+
+	Type ::= INTEGER
+
+END

tests/121-empty-imports-OK.asn1.-EF

+ModuleEmptyIMPORTS { iso org(3) dod(6) internet(1) private(4) enterprise(1)
+	spelio(9363) software(1) asn1c(5) test(1) 121 }
+DEFINITIONS AUTOMATIC TAGS ::=
+BEGIN
+
+Type ::= INTEGER
+
+END