main: readd runPrompt and runFile

- main: make run() use the VM struct instance

src/compiler.zig

@@ -1,13 +1,15 @@
-const token = @import("token.zig");
+const std = @import("std");
-const scanner = @import("scanner.zig");
+const scanner = @import("new_scanner.zig");
-const main = @import("main.zig");
+
+const Allocator = std.mem.Allocator;
 
 pub const Compiler = struct {
-    tokens: *scanner.TokenList,
+    src: []const u8,
+    allocator: *Allocator,
 
-    fn init(tokens: *scanner.TokenList) Compiler {
+    pub fn init(allocator: *Allocator, source: []const u8) Compiler {
-        return Compiler{ .tokens = tokens };
+        return Compiler{ .src = source, .allocator = allocator };
     }
 
-    fn advance(self: *Compiler) void {}
+    pub fn compile(self: *Compiler) void {}
 };

src/main.zig

@@ -6,38 +6,20 @@ const Allocator = std.mem.Allocator;
 const chunk = @import("chunk.zig");
 const vm = @import("vm.zig");
 
+const InterpretResult = vm.InterpretResult;
+
 //const Compiler = @import("compiler.zig").Compiler;
 
 pub var hadError = false;
 
-fn run(allocator: *Allocator, data: []u8) !void {
+fn run(allocator: *Allocator, data: []u8) !InterpretResult {
     var stdout_file = try std.io.getStdOut();
     const stdout = &stdout_file.outStream().stream;
 
-    var scanner = try Scanner.init(allocator, data);
+    var vmach = try vm.VM.init(allocator, stdout, data, true);
-    var tokens = try scanner.scanTokens();
+    return vmach.interpret();
-
-    var it = tokens.iterator();
-
-    while (it.next()) |token| {
-        switch (token) {
-            .Simple => |value| {
-                try value.printToken(stdout);
-            },
-            .Slice => |value| {
-                try value.printToken(stdout);
-            },
-            .Number => |value| {
-                try value.printToken(stdout);
-            },
-        }
-
-        hadError = false;
-    }
 }
 
-// fn run() !void {}
-
 pub fn doError(line: usize, message: []const u8) !void {
     try errorReport(line, "", message);
 }
@@ -58,8 +40,9 @@ fn runFile(allocator: *Allocator, path: []const u8) !void {
     var slice = try allocator.alloc(u8, total_bytes);
     _ = try lox_file.read(slice);
 
-    try run(allocator, slice);
+    var res = try run(allocator, slice);
-    if (hadError) std.os.exit(65);
+    if (res == vm.InterpretResult.CompileError) std.os.exit(65);
+    if (res == vm.InterpretResult.RuntimeError) std.os.exit(70);
 }
 
 fn runPrompt(allocator: *Allocator) !void {
@@ -72,14 +55,15 @@ fn runPrompt(allocator: *Allocator) !void {
 
         var line = std.io.readLine(&buffer) catch |err| {
             if (err == error.EndOfStream) return;
+
             return err;
         };
 
-        try run(allocator, line);
+        _ = try run(allocator, line);
     }
 }
 
-pub fn mainOld() anyerror!void {
+pub fn main() anyerror!void {
     var da = std.heap.DirectAllocator.init();
     var arena = std.heap.ArenaAllocator.init(&da.allocator);
     defer arena.deinit();
@@ -93,15 +77,14 @@ pub fn mainOld() anyerror!void {
     });
 
     var lox_path = try (args_it.next(allocator) orelse {
-        // try runPrompt(allocator);
+        try runPrompt(allocator);
-        unreachable;
+        return;
     });
 
-    //var vm = VM.init();
+    try runFile(allocator, lox_path);
-    //try runFile(allocator, lox_path);
 }
 
-pub fn main() !void {
+pub fn oldMain() !void {
     var da = std.heap.DirectAllocator.init();
     var arena = std.heap.ArenaAllocator.init(&da.allocator);
     defer arena.deinit();
@@ -110,19 +93,8 @@ pub fn main() !void {
     var stdout_file = try std.io.getStdOut();
     var stdout = &stdout_file.outStream().stream;
 
-    var chk = try chunk.Chunk.init(allocator);
-
     // this crashes zig??? lol
+    // var chk = try chunk.Chunk.init(allocator);
     //var opcode_byte: u8 = @enumToInt(chunk.OpCode.Return);
     //try chk.write(chunk.OpCode.Return);
-
-    try chk.writeConstant(1.2, 123);
-    try chk.writeConstant(3.4, 123);
-    try chk.write(chunk.OpCode.Add, 123);
-    try chk.writeConstant(5.6, 123);
-    try chk.write(chunk.OpCode.Divide, 123);
-    try chk.write(chunk.OpCode.Return, 123);
-
-    var vmach = try vm.VM.init(allocator, stdout, &chk, true);
-    _ = try vmach.interpret();
 }

src/vm.zig

@@ -1,9 +1,11 @@
 const std = @import("std");
 const chunk = @import("chunk.zig");
 const value = @import("value.zig");
+const compiler = @import("compiler.zig");
 
 const Chunk = chunk.Chunk;
 const Value = value.Value;
+const Compiler = compiler.Compiler;
 
 const StdOut = *std.io.OutStream(std.fs.File.WriteError);
 
@@ -14,7 +16,8 @@ pub const InterpretResult = enum {
 };
 
 pub const VM = struct {
-    chk: *Chunk,
+    chk: *Chunk = undefined,
+    src: []const u8,
     ip: usize = 0,
 
     stack: []Value,
@@ -31,11 +34,11 @@ pub const VM = struct {
     pub fn init(
         allocator: *std.mem.Allocator,
         stdout: StdOut,
-        chk: *Chunk,
+        source: []const u8,
         debug_flag: bool,
     ) !VM {
         var self = VM{
-            .chk = chk,
+            .src = source,
 
             .stack = try allocator.alloc(Value, 256),
             .stdout = stdout,
@@ -156,13 +159,15 @@ pub const VM = struct {
         }
     }
 
-    pub fn interpret(self: *VM) !InterpretResult {
+    pub fn interpret(self: *VM) InterpretResult {
-        self.ip = 0;
+        //self.ip = 0;
-
+        //self.debug("VM start\n");
-        self.debug("VM start\n");
+        //var res = try self.run();
-        var res = try self.run();
+        //self.debug("VM end\n");
-        self.debug("VM end\n");
+        //return res;
-        return res;
+        var cmpr = Compiler.init(self.allocator, self.src);
+        cmpr.compile();
+        return InterpretResult.Ok;
     }
 
     pub fn push(self: *VM, val: Value) !void {