add subtract support and string concatenation

src/translator/bytecode_spec.md

@@ -131,4 +131,8 @@ loads a mpq_t number into memory
 
 ## OP_LOAD_ADDITION_FUNCTION
 
-loads the addition function into register 1
+loads the addition function into register 1
+
+## OP_LOAD_SUBTRACTION_FUNCTION
+
+loads the subtraction function into register 1

src/translator/operation/operation.c

@@ -8,18 +8,20 @@
 #include <stddef.h>
 
 size_t translate_operation(Translated *translated, ParsedOperation *operation,
-                        ArErr *err) {
+                           ArErr *err) {
   set_registers(translated, 1);
   uint64_t first;
   switch (operation->operation) {
-    case TOKEN_PLUS:;
-      first = push_instruction_byte(translated, OP_LOAD_ADDITION_FUNCTION);
-      break;
-    default:
-      *err = create_err(operation->line, operation->column,
-                                          operation->length, translated->path, "Syntax Error",
-                                          "unknown operation");
-      return 0;
+  case TOKEN_PLUS:;
+    first = push_instruction_byte(translated, OP_LOAD_ADDITION_FUNCTION);
+    break;
+  case TOKEN_MINUS:
+    first = push_instruction_byte(translated, OP_LOAD_SUBTRACTION_FUNCTION);
+    break;
+  default:
+    *err = create_err(operation->line, operation->column, operation->length,
+                      translated->path, "Syntax Error", "unknown operation");
+    return 0;
   }
   push_instruction_byte(translated, OP_INIT_CALL);
   push_instruction_code(translated, operation->to_operate_on.size);

src/translator/translator.c

@@ -135,6 +135,11 @@ size_t translate_parsed(Translated *translated, ParsedValue *parsedValue,
     size_t output = push_instruction_byte(translated, OP_LOAD_NULL);
     push_instruction_byte(translated, 0);
     return output;
+  case AST_BOOLEAN:
+    set_registers(translated, 1);
+    output = push_instruction_byte(translated, OP_LOAD_BOOL);
+    push_instruction_byte(translated, (bool)parsedValue->data);
+    return output;
   case AST_FUNCTION:
     return translate_parsed_function(translated,
                                      (ParsedFunction *)parsedValue->data, err);

src/translator/translator.h

@@ -32,7 +32,8 @@ typedef enum {
   OP_LOAD_ACCESS_FUNCTION,
   OP_LOAD_BOOL,
   OP_LOAD_NUMBER,
-  OP_LOAD_ADDITION_FUNCTION
+  OP_LOAD_ADDITION_FUNCTION,
+  OP_LOAD_SUBTRACTION_FUNCTION
 } OperationType;
 
 void arena_resize(ConstantArena *arena, size_t new_size);