allow variadic arguments for print

lab-5/Makefile

@@ -2,7 +2,7 @@
 # The top level rule indicates how to link everything together into main
 
 main: main.o symbol_map.o expr.o scanner.o parser.o
-	gcc -g3 main.o symbol_map.o expr.o scanner.o parser.o -o interpreter.out -lm
+	gcc main.o symbol_map.o expr.o scanner.o parser.o -o interpreter.out -lm
 
 test: main_test.o symbol_map.o expr.o scanner.o parser.o
 	gcc main_test.o symbol_map.o expr.o scanner.o parser.o -o interpreter_test.out -lm

lab-5/expr.c

@@ -264,16 +264,7 @@ void stmt_evaluate(struct stmt *s) {
     }
     break;
   case STMT_PRINT:
-    if (s->expr->kind == EXPR_STRING_LITERAL) {
-      printf("%s", expr_string_evaluate(s->expr));
-    } else if (s->expr->kind == EXPR_FLOAT_LITERAL) {
-      printf("%f", expr_evaluate(s->expr));
-    } else if (s->expr->kind == EXPR_INTEGER_LITERAL ||
-               s->expr->kind == EXPR_NAME || s->expr->kind == EXPR_SUBSCRIPT) {
-      printf("%.0f", expr_evaluate(s->expr));
-    } else {
-      printf("runtime error: print expression is not literal\n");
-    }
+    stmt_evaluate_print(s->expr);
     break;
   case STMT_BLOCK:
     stmt_evaluate(s->body);
@@ -285,6 +276,25 @@ void stmt_evaluate(struct stmt *s) {
   stmt_evaluate(s->next);
 }
 
+void stmt_evaluate_print(struct expr *e) {
+  if (!e)
+    return;
+
+
+  if (e->kind == EXPR_STRING_LITERAL) {
+      printf("%s", expr_string_evaluate(e));
+    } else if (e->kind == EXPR_FLOAT_LITERAL) {
+      printf("%f", expr_evaluate(e));
+  } else if (e->kind == EXPR_INTEGER_LITERAL ||
+               e->kind == EXPR_NAME || e->kind == EXPR_SUBSCRIPT) {
+    printf("%.0f", expr_evaluate(e));
+  } else {
+      printf("runtime error: print expression is not literal\n");
+  }
+
+  stmt_evaluate_print(e->right);
+}
+
 void decl_evaluate(struct decl *d) {
   if (!d)
     return;

lab-5/expr.h

@@ -106,6 +106,7 @@ void expr_print(struct expr *e);
 
 void stmt_evaluate(struct stmt *e);
 void decl_evaluate(struct decl *e);
+void stmt_evaluate_print(struct expr *e);
 void decl_subscript_evaluate(struct expr *e, float value);
 float expr_evaluate(struct expr *e);
 struct expr *expr_sub_evaluate(struct expr *e);

lab-5/main.c

@@ -24,7 +24,7 @@ int main(int argc, char *argv[]) {
       "Enter an infix expression using the operators +-*/() ending with ;\n\n");
   
   if (yyparse() == 0) {
-    printf("Parse successful: ");
+    printf("Parse successful: \n");
     if (parser_result != NULL) {
       stmt_print(parser_result);
       printf("\n");

lab-5/parser.bison

@@ -12,7 +12,7 @@ YYSTYPE is the lexical value returned by each rule in a bison grammar.
 By default, it is an integer. In this example, we are returning a pointer to an expression.
 */
 
-#define YYSTYPE struct stmt *
+// #define YYSTYPE struct stmt *
 
 /*
 Clunky: Manually declare the interface to the scanner generated by flex. 
@@ -83,6 +83,21 @@ struct stmt *parser_result = 0;
 %token TOKEN_EXPONENTIAL
 %token TOKEN_DISPLAY
 
+
+%left TOKEN_ADD TOKEN_SUB
+%left TOKEN_MULTIPLY TOKEN_DIVIDE
+%left TOKEN_EXPONENTIAL
+
+%union {
+    struct expr *expr;
+    struct stmt *stmt;
+    struct decl *decl;
+}
+
+%type <stmt> statement_list statement section stop_run sect_data simple_stmt data_declaration cbl_func_stmt cbl_function
+%type <expr> mathmaticalexpr booleanexpr term op_parm container_expr type_expr op_parms math_op
+%type <decl> assignment_stmt
+
 %%
 file            : statement_list
                     {parser_result = $1; return 0;}
@@ -128,15 +143,18 @@ cbl_func_stmt   : cbl_function
                 | cbl_function op_parms
                     {$$ = stmt_create($1->kind, NULL, NULL, $2, NULL, NULL, NULL, NULL);}
                 | cbl_function assignment_stmt
+                    {$$ = stmt_create($1->kind, NULL, NULL, NULL, NULL, $2, NULL, NULL);}
                 | cbl_function op_parm assignment_stmt
                 ;
 assignment_stmt : TOKEN_EQUAL op_parms
+                    {$$ = decl_create(NULL, NULL, $2, NULL, NULL);}
                 | TOKEN_KEYWORD_TO op_parms
+                    {$$ = decl_create(NULL, NULL, $2, NULL, NULL);}
                 ;
 op_parms        : op_parm
                     {$$ = $1;}
                 | op_parm op_parms
-                    {$$ = $1; $1->next_expr = $2;}
+                    {$$ = $1; $1->right = $2;}
                 ;
 op_parm         : mathmaticalexpr
                     {$$ = $1;}
@@ -160,11 +178,11 @@ math_op         : TOKEN_ADD
 mathmaticalexpr : type_expr
                     {$$ = $1;}
                 | mathmaticalexpr math_op term
-                    
+                    {$$ = expr_create($2->kind, $1, $3);}
                 | container_expr
                     {$$ = $1;}
                 | type_expr container_expr
-                    {$$ = $1; $1->next_expr = $2;}
+                    {$$ = $1; $1->right = $2;}
                 ;
 container_expr  : TOKEN_LEFT_PARENTHESIS mathmaticalexpr TOKEN_RIGHT_PARENTHESIS
                 ;

lab-5/samples/hello-world-multiple-args.cbl

@@ -0,0 +1,5 @@
+IDENTIFICATION DIVISION.
+PROGRAM-ID. HELLO-WORLD.
+PROCEDURE DIVISION.
+    DISPLAY 'Hello World!' 'Hello World' 'Lorem Ipsum'
+STOP RUN.