Match all instructions with number argument

src/grammars/mblf.pest

@@ -5,13 +5,22 @@ variable       =@{ ASCII_ALPHA
                  ~ (ASCII_ALPHANUMERIC | " ")*
                  }
 
+decNum         =_{ ASCII_DIGIT+ }
+hexNum         =_{ "0x" ~ ASCII_HEX_DIGIT+ }
+num            = { hexNum | decNum }
+
 var            =@{ "var"    ~ spacing+ ~ variable }
 delvar         =@{ "delvar" ~ spacing+ ~ variable }
 
 point          =@{ "point"  ~ spacing+ ~ variable }
 pointm         =@{ "pointm" ~ spacing+ ~ variable }
 
+add            =@{ "add"    ~ spacing+ ~ num }
+addb           =@{ "addb"   ~ spacing+ ~ num }
 addv           =@{ "addv"   ~ spacing+ ~ variable }
+
+sub            =@{ "sub"    ~ spacing+ ~ num }
+subb           =@{ "subb"   ~ spacing+ ~ num }
 subv           =@{ "subv"   ~ spacing+ ~ variable }
 
 copy           =@{ "copy"   ~ spacing+ ~ variable }
@@ -22,7 +31,12 @@ instruction    =_{ var
                  | point
                  | pointm
 
+                 | add
+                 | addb
                  | addv
+
+                 | sub
+                 | subb
                  | subv
 
                  | copy