Add syntax to push and modify stacks in one line (#1421)

src/asm/parser.y

@@ -545,6 +545,7 @@ directive:
 	| setcharmap
 	| pushc
 	| popc
+	| pushc_setcharmap
 	| load
 	| shift
 	| fail
@@ -561,6 +562,7 @@ directive:
 	| purge
 	| pops
 	| pushs
+	| pushs_section
 	| endsection
 	| popo
 	| pusho
@@ -664,7 +666,16 @@ popo:
 pusho:
 	POP_PUSHO {
 		opt_Push();
+		// Parsing 'optional_opt_list' will restore the lexer's normal mode
+		lexer_SetMode(LEXER_RAW);
+	} optional_opt_list
+;
+
+optional_opt_list:
+	%empty {
+		lexer_SetMode(LEXER_NORMAL);
 	}
+	| opt_list
 ;
 
 pops:
@@ -1067,6 +1078,13 @@ pushc:
 	}
 ;
 
+pushc_setcharmap:
+	POP_PUSHC ID {
+		charmap_Push();
+		charmap_Set($2);
+	}
+;
+
 popc:
 	POP_POPC {
 		charmap_Pop();
@@ -1536,6 +1554,13 @@ section:
 	}
 ;
 
+pushs_section:
+	POP_PUSHS sect_mod string COMMA sect_type sect_org sect_attrs {
+		sect_PushSection();
+		sect_NewSection($3, (SectionType)$5, $6, $7, $2);
+	}
+;
+
 sect_mod:
 	%empty {
 		$$ = SECTION_NORMAL;