diff --git a/hblang/examples/directives.hb b/hblang/examples/directives.hb
index 54540cf..b371db4 100644
--- a/hblang/examples/directives.hb
+++ b/hblang/examples/directives.hb
@@ -1,4 +1,3 @@
-
 Type := struct {
 	brah: int,
 	blah: int,
diff --git a/hblang/examples/loops.hb b/hblang/examples/loops.hb
index 8520da2..91fc44b 100644
--- a/hblang/examples/loops.hb
+++ b/hblang/examples/loops.hb
@@ -12,7 +12,7 @@ fib := fn(n: int): int {
 		c := a + b;
 		a = b;
 		b = c;
-		n = n - 1;
+		n -= 1;
 
 		stack_reclamation_edge_case := 0;
 
diff --git a/hblang/src/codegen.rs b/hblang/src/codegen.rs
index f4f7c94..47b6c96 100644
--- a/hblang/src/codegen.rs
+++ b/hblang/src/codegen.rs
@@ -724,7 +724,7 @@ impl<'a> Codegen<'a> {
         match *expr {
             E::Ident { id, .. } if ident::is_null(id) => id,
             E::UnOp {
-                op: T::Star, val, ..
+                op: T::Mul, val, ..
             } => {
                 let ty = self.ty(val);
                 self.alloc_pointer(ty)
@@ -918,7 +918,7 @@ impl<'a> Codegen<'a> {
                 Some(Value { ty, loc })
             }
             E::UnOp {
-                op: T::Amp,
+                op: T::Band,
                 val,
                 pos,
             } => {
@@ -953,7 +953,7 @@ impl<'a> Codegen<'a> {
                 })
             }
             E::UnOp {
-                op: T::Star,
+                op: T::Mul,
                 val,
                 pos,
             } => {
@@ -1198,7 +1198,7 @@ impl<'a> Codegen<'a> {
                     self.display_ty(right.ty)
                 );
 
-                if matches!(op, T::Plus | T::Minus) {
+                if matches!(op, T::Add | T::Sub) {
                     let min_size = lsize.min(rsize);
                     if bt::is_signed(ty) && min_size < size {
                         let operand = if lsize < rsize { lhs.0 } else { rhs.0 };
@@ -1280,16 +1280,16 @@ impl<'a> Codegen<'a> {
         use instrs as i;
         Some(
             match op {
-                T::Plus => [i::add8, i::add16, i::add32, i::add64],
-                T::Minus => [i::sub8, i::sub16, i::sub32, i::sub64],
-                T::Star => [i::mul8, i::mul16, i::mul32, i::mul64],
-                T::FSlash if signed => [
+                T::Add => [i::add8, i::add16, i::add32, i::add64],
+                T::Sub => [i::sub8, i::sub16, i::sub32, i::sub64],
+                T::Mul => [i::mul8, i::mul16, i::mul32, i::mul64],
+                T::Div if signed => [
                     |a, b, c| i::dirs8(a, ZERO, b, c),
                     |a, b, c| i::dirs16(a, ZERO, b, c),
                     |a, b, c| i::dirs32(a, ZERO, b, c),
                     |a, b, c| i::dirs64(a, ZERO, b, c),
                 ],
-                T::FSlash => [
+                T::Div => [
                     |a, b, c| i::diru8(a, ZERO, b, c),
                     |a, b, c| i::diru16(a, ZERO, b, c),
                     |a, b, c| i::diru32(a, ZERO, b, c),
diff --git a/hblang/src/lexer.rs b/hblang/src/lexer.rs
index f3a6ee7..aea842e 100644
--- a/hblang/src/lexer.rs
+++ b/hblang/src/lexer.rs
@@ -29,8 +29,8 @@ macro_rules! gen_token_kind {
                 $punkt:ident = $punkt_lit:literal,
             )*
             #[ops] $(
-                #[prec = $prec:literal] $(
-                    $op:ident = $op_lit:literal,
+                #[$prec:ident] $(
+                    $op:ident = $op_lit:literal $(=> $assign:ident)?,
                 )*
             )*
         }
@@ -42,7 +42,8 @@ macro_rules! gen_token_kind {
 
                     $( Self::$keyword => stringify!($keyword_lit), )*
                     $( Self::$punkt   => stringify!($punkt_lit),   )*
-                    $($( Self::$op    => $op_lit,                )*)*
+                    $($( Self::$op    => $op_lit,
+                      $(Self::$assign => concat!($op_lit, "="),)?)*)*
                 };
                 f.write_str(s)
             }
@@ -52,9 +53,10 @@ macro_rules! gen_token_kind {
             #[inline(always)]
             pub fn precedence(&self) -> Option<u8> {
                 Some(match self {
-                    $($(Self::$op)|* => $prec,)*
+                    $($(Self::$op => ${ignore($prec)} ${index(1)},
+                      $(Self::$assign => 0,)?)*)*
                     _ => return None,
-                })
+                } + 1)
             }
 
             #[inline(always)]
@@ -64,6 +66,13 @@ macro_rules! gen_token_kind {
                     _ => Self::Ident,
                 }
             }
+
+            pub fn assign_op(&self) -> Option<Self> {
+                Some(match self {
+                    $($($(Self::$assign => Self::$op,)?)*)*
+                    _ => return None,
+                })
+            }
         }
 
         #[derive(Debug, PartialEq, Eq, Clone, Copy)]
@@ -71,7 +80,7 @@ macro_rules! gen_token_kind {
             $( $pattern, )*
             $( $keyword, )*
             $( $punkt,   )*
-            $($( $op,  )*)*
+            $($( $op, $($assign,)?  )*)*
         }
     };
 }
@@ -104,26 +113,39 @@ gen_token_kind! {
         Comma  = ",",
         Dot    = ".",
         Ctor   = ".{",
-        Tupl  = ".(",
+        Tupl   = ".(",
         #[ops]
-        #[prec = 1]
+        #[prec]
         Decl   = ":=",
         Assign = "=",
-        #[prec = 21]
+        #[prec]
+        Or = "||",
+        #[prec]
+        And = "&&",
+        #[prec]
+        Bor = "|" => BorAss,
+        #[prec]
+        Xor = "^" => XorAss,
+        #[prec]
+        Band = "&" => BandAss,
+        #[prec]
+        Eq = "==",
+        Ne = "!=",
+        #[prec]
         Le = "<=",
         Ge = ">=",
         Lt = "<",
         Gt = ">",
-        Eq = "==",
-        Ne = "!=",
-        #[prec = 22]
-        Amp = "&",
-        #[prec = 23]
-        Plus  = "+",
-        Minus = "-",
-        #[prec = 24]
-        Star   = "*",
-        FSlash = "/",
+        #[prec]
+        Shl = "<<" => ShlAss,
+        Shr = ">>" => ShrAss,
+        #[prec]
+        Add = "+" => AddAss,
+        Sub = "-" => SubAss,
+        #[prec]
+        Mul = "*" => MulAss,
+        Div = "/" => DivAss,
+        Mod = "%" => ModAss,
     }
 }
 
@@ -155,11 +177,92 @@ impl<'a> Lexer<'a> {
     }
 
     pub fn next(&mut self) -> Token {
-        Iterator::next(self).unwrap_or(Token {
-            kind:  TokenKind::Eof,
-            start: self.pos,
-            end:   self.pos,
-        })
+        use TokenKind as T;
+        loop {
+            let mut start = self.pos;
+
+            let Some(c) = self.advance() else {
+                return Token {
+                    kind: T::Eof,
+                    start,
+                    end: self.pos,
+                };
+            };
+
+            let kind = match c {
+                b'\n' | b'\r' | b'\t' | b' ' => continue,
+                b'0'..=b'9' => {
+                    while let Some(b'0'..=b'9') = self.peek() {
+                        self.advance();
+                    }
+                    T::Number
+                }
+                c @ (b'a'..=b'z' | b'A'..=b'Z' | b'_' | b'@') => {
+                    while let Some(b'a'..=b'z' | b'A'..=b'Z' | b'0'..=b'9' | b'_') = self.peek() {
+                        self.advance();
+                    }
+
+                    if c == b'@' {
+                        start += 1;
+                        T::Driective
+                    } else {
+                        let ident = &self.bytes[start as usize..self.pos as usize];
+                        T::from_ident(ident)
+                    }
+                }
+                b':' if self.advance_if(b'=') => T::Decl,
+                b':' => T::Colon,
+                b',' => T::Comma,
+                b'.' if self.advance_if(b'{') => T::Ctor,
+                b'.' if self.advance_if(b'(') => T::Tupl,
+                b'.' => T::Dot,
+                b';' => T::Semi,
+                b'!' if self.advance_if(b'=') => T::Ne,
+                b'=' if self.advance_if(b'=') => T::Eq,
+                b'=' => T::Assign,
+                b'<' if self.advance_if(b'=') => T::Le,
+                b'<' if self.advance_if(b'<') => match self.advance_if(b'=') {
+                    true => T::ShlAss,
+                    false => T::Shl,
+                },
+                b'<' => T::Lt,
+                b'>' if self.advance_if(b'=') => T::Ge,
+                b'>' if self.advance_if(b'>') => match self.advance_if(b'=') {
+                    true => T::ShrAss,
+                    false => T::Shr,
+                },
+                b'>' => T::Gt,
+                b'+' if self.advance_if(b'=') => T::AddAss,
+                b'+' => T::Add,
+                b'-' if self.advance_if(b'=') => T::SubAss,
+                b'-' => T::Sub,
+                b'*' if self.advance_if(b'=') => T::MulAss,
+                b'*' => T::Mul,
+                b'/' if self.advance_if(b'=') => T::DivAss,
+                b'/' => T::Div,
+                b'%' if self.advance_if(b'=') => T::ModAss,
+                b'%' => T::Mod,
+                b'&' if self.advance_if(b'=') => T::BandAss,
+                b'&' if self.advance_if(b'&') => T::And,
+                b'&' => T::Band,
+                b'^' if self.advance_if(b'=') => T::XorAss,
+                b'^' => T::Xor,
+                b'|' if self.advance_if(b'=') => T::BorAss,
+                b'|' if self.advance_if(b'|') => T::Or,
+                b'|' => T::Bor,
+                b'(' => T::LParen,
+                b')' => T::RParen,
+                b'{' => T::LBrace,
+                b'}' => T::RBrace,
+                _ => T::Error,
+            };
+
+            return Token {
+                kind,
+                start,
+                end: self.pos,
+            };
+        }
     }
 
     fn advance_if(&mut self, arg: u8) -> bool {
@@ -232,11 +335,11 @@ impl<'a> Iterator for Lexer<'a> {
                 b'<' => T::Lt,
                 b'>' if self.advance_if(b'=') => T::Ge,
                 b'>' => T::Gt,
-                b'+' => T::Plus,
-                b'-' => T::Minus,
-                b'*' => T::Star,
-                b'/' => T::FSlash,
-                b'&' => T::Amp,
+                b'+' => T::Add,
+                b'-' => T::Sub,
+                b'*' => T::Mul,
+                b'/' => T::Div,
+                b'&' => T::Band,
                 b'(' => T::LParen,
                 b')' => T::RParen,
                 b'{' => T::LBrace,
diff --git a/hblang/src/parser.rs b/hblang/src/parser.rs
index a83a436..ef1c0b6 100644
--- a/hblang/src/parser.rs
+++ b/hblang/src/parser.rs
@@ -74,7 +74,7 @@ impl<'a, 'b> Parser<'a, 'b> {
         self.bin_expr(left, 0)
     }
 
-    fn bin_expr(&mut self, mut left: Expr<'a>, min_prec: u8) -> Expr<'a> {
+    fn bin_expr(&mut self, mut fold: Expr<'a>, min_prec: u8) -> Expr<'a> {
         loop {
             let Some(prec) = self.token.kind.precedence() else {
                 break;
@@ -87,14 +87,22 @@ impl<'a, 'b> Parser<'a, 'b> {
             let op = self.next().kind;
             let right = self.unit_expr();
             let right = self.bin_expr(right, prec);
-            left = Expr::BinOp {
-                left: self.arena.alloc(left),
-                right: self.arena.alloc(right),
-                op,
-            };
+            let right = &*self.arena.alloc(right);
+            let left = &*self.arena.alloc(fold);
+
+            if let Some(op) = op.assign_op() {
+                let right = Expr::BinOp { left, op, right };
+                fold = Expr::BinOp {
+                    left,
+                    op: TokenKind::Assign,
+                    right: self.arena.alloc(right),
+                };
+            } else {
+                fold = Expr::BinOp { left, right, op };
+            }
         }
 
-        left
+        fold
     }
 
     fn try_resolve_builtin(name: &str) -> Option<Ident> {
@@ -220,7 +228,7 @@ impl<'a, 'b> Parser<'a, 'b> {
                 },
                 body: self.ptr_expr(),
             },
-            T::Amp | T::Star => E::UnOp {
+            T::Band | T::Mul => E::UnOp {
                 pos: token.start,
                 op:  token.kind,
                 val: self.ptr_unit_expr(),
diff --git a/hblang/tests/lexer_tests_arithmetic.txt b/hblang/tests/lexer_tests_arithmetic.txt
index 6e255bf..26de539 100644
--- a/hblang/tests/lexer_tests_arithmetic.txt
+++ b/hblang/tests/lexer_tests_arithmetic.txt
@@ -8,23 +8,23 @@ Ident "int"
 LBrace "{"
 Return "return"
 Number "10"
-Minus "-"
+Sub "-"
 Number "20"
-FSlash "/"
+Div "/"
 Number "2"
-Plus "+"
+Add "+"
 Number "4"
-Star "*"
+Mul "*"
 LParen "("
 Number "2"
-Plus "+"
+Add "+"
 Number "2"
 RParen ")"
-Minus "-"
+Sub "-"
 Number "4"
-Star "*"
+Mul "*"
 Number "4"
-Plus "+"
+Add "+"
 Number "1"
 Semi ";"
 RBrace "}"