analyze: make VarDecl statements insert symbols to current scope

examples/hello.ry

@@ -3,7 +3,7 @@ const (
 )
 
 fn f() i32 {
-    // var a = 3;
+    var a = 3;
     // return a;
     return 2;
 }
@@ -34,8 +34,10 @@ fn test_function() B {
 fn multwo(num: i32, double_flag: bool) i32 {
     // TODO resolve expr variables
     if (true) {
+        var truthy = true;
         return 1 * 2;
     } else {
+        var falsey = false;
         return 1;
     }
 }

src/analysis.zig

@@ -344,7 +344,16 @@ pub const TypeSolver = struct {
             // insert it into the context, however we need to know a pointer
             // to where we are, scope-wise, we don't have that info here,
             // so it should be implicit into the context.
-            .VarDecl => @panic("TODO vardecl"),
+            .VarDecl => |vardecl| {
+                self.setErrToken(vardecl.name);
+                const name = vardecl.name.lexeme;
+
+                var var_type = try self.resolveExprType(ctx, vardecl.value);
+
+                // TODO check current_scope being null
+
+                _ = try ctx.current_scope.?.env.put(name, var_type);
+            },
 
             // Returns dont cause any type system things as they deal with
             // values, however, we must ensure that the expression type

src/ast_printer.zig

@@ -376,7 +376,7 @@ pub fn printScope(scope: *Scope, ident: usize) void {
 
     var it = scope.env.iterator();
     while (it.next()) |kv| {
-        print(ident, "sym: {}, typ: {}\n", kv.key, prettyType(kv.value));
+        print(ident + 1, "sym: {}, typ: {}\n", kv.key, prettyType(kv.value));
     }
 
     for (scope.children.toSlice()) |child| {