interim commit

src/main.rs

@@ -3,6 +3,63 @@ use std::io;
 use std::io::Read;
 use std::env;
 
+enum Exec {
+/*Addition operation*/
+    ADD(0, "add"),
+/*Subtraction operation*/
+    SUB(0, "sub"),
+/*Multiplication operation*/
+    MULT(0, "mult"),
+/*Division operation*/
+    DIV(0, "div"),
+/*Modulo operation*/
+    MOD(0, "mod"),
+/*< operation*/
+    LT(0, "lt"),
+/*== operation*/
+    EQ(0, "eq"),
+/*> operation*/
+    GT(0, "gt"),
+/*branch operation*/
+    BR(1, "br"),
+/*branch if true operation*/
+    BRT(1, "brt"),
+/*branch if false operation*/
+    BRF(1, "brf"),
+/*put operation*/
+    CONST(1, "const"),
+/*load variable operation*/
+    LOAD(1, "load"),
+/*load global variable operation*/
+    GLOAD(1, "gload"),
+/*store variable operation*/
+    STORE(1, "store"),
+/*store global variable operation*/
+    GSTORE(1, "gstore"),
+/*print operation*/
+    PRINT(0, "print"),
+/*pop operation*/
+    POP(0, "pop"),
+/*end/halt operation*/
+    HALT(0, "halt"),
+/*<= operation*/
+    LEQ(0, "leq"),
+/*>= operation*/
+    GEQ(0, "geq"),
+/*call subroutine operation*/
+    CALL(2, "call"),
+/*return from subroutine operation*/
+    RET(0, "ret"),
+/*print integer operation*/
+    IPRINT(0, "iprint"),
+/*fetch operation*/
+    FETCH(0, "fetch"),
+/*++ operation*/
+    INC(0, "inc"),
+/*-- operation*/
+    DEC(0, "dec")
+}
+
 fn usage(pname: String) {
     println!("usage: {} <file>", pname);
 }
@@ -14,6 +71,13 @@ fn get_contents(fname: String) -> Result<String, io::Error> {
     Ok(contents)
 }
 
+fn parse(contents: String) -> Vec<Exec> {
+    return vec![];
+}
+
+fn exec(instructions: Vec<Exec>) {
+}
+
 fn main() {
     let args: Vec<_> = env::args().collect();
 
@@ -25,8 +89,15 @@ fn main() {
     let fname = args[1].clone();
     let contents = get_contents(fname);
 
-    match contents {
+    let contents = match contents {
-        Ok(v) => println!("{}", v),
+        Ok(v) => v,
-        Err(e) => println!("{}", e)
+        Err(e) => {
+            println!("{}", e);
+            return;
+        }
     }
+
+    let parsed = parse(contents);
+
+    let execd = exec(contents);
 }