Revert "parser: advanced division by zero check (#5629)"

This reverts commit f03688e443.

vlib/v/checker/checker.v

@@ -548,6 +548,14 @@ pub fn (mut c Checker) infix_expr(mut infix_expr ast.InfixExpr) table.Type {
 						}
 					}
 				}
+				if infix_expr.op in [.div, .mod] {
+					if (infix_expr.right is ast.IntegerLiteral &&
+						infix_expr.right.str() == '0') ||
+						(infix_expr.right is ast.FloatLiteral && infix_expr.right.str().f64() == 0.0) {
+						oper := if infix_expr.op == .div { 'division' } else { 'modulo' }
+						c.error('$oper by zero', right_pos)
+					}
+				}
 				return_type = promoted_type
 			}
 		}

vlib/v/checker/tests/division_by_zero_float_err.out

@@ -1,4 +1,4 @@
-vlib/v/parser/tests/division_by_zero_float_err.v:2:14: error: division by zero
+vlib/v/checker/tests/division_by_zero_float_err.v:2:14: error: division by zero
     1 | fn main() {
     2 |     println(1.0/0.0)
       |                 ~~~

vlib/v/checker/tests/division_by_zero_int_err.out

@@ -1,4 +1,4 @@
-vlib/v/parser/tests/division_by_zero_int_err.v:2:12: error: division by zero
+vlib/v/checker/tests/division_by_zero_int_err.v:2:12: error: division by zero
     1 | fn main() {
     2 |     println(1/0)
       |               ^

vlib/v/parser/pratt.v

@@ -239,28 +239,6 @@ fn (mut p Parser) infix_expr(left ast.Expr) ast.Expr {
 		p.expecting_type = true
 	}
 	right = p.expr(precedence)
-
-	if op in [.div, .mod] {
-		oper := if op == .div { 'division' } else { 'modulo' }
-		match right {
-			ast.FloatLiteral {
-				if it.val.f64() == 0.0 {
-					p.error_with_pos('$oper by zero', right.pos)
-				}
-			}
-			ast.Ident {
-				if p.is_var_zero(right.name) {
-					p.error_with_pos('$oper by zero', right.pos)
-				}
-			}
-			ast.IntegerLiteral {
-				if it.val.int() == 0 {
-					p.error_with_pos('$oper by zero', right.pos)
-				}
-			}
-			else {}
-		}
-	}
 	return ast.InfixExpr{
 		left: left
 		right: right
@@ -269,26 +247,6 @@ fn (mut p Parser) infix_expr(left ast.Expr) ast.Expr {
 	}
 }
 
-fn (mut p Parser) is_var_zero(name string) bool {
-	var := p.scope.find_var(name) or {
-		return false
-	}
-	match var.expr {
-		ast.FloatLiteral {
-			if it.val.f64() == 0.0 {
-				return true
-			}
-		}
-		ast.IntegerLiteral {
-			if it.val.int() == 0 {
-				return true
-			}
-		}
-		else {}
-	}
-	return false
-}
-
 fn (mut p Parser) prefix_expr() ast.PrefixExpr {
 	pos := p.tok.position()
 	op := p.tok.kind

vlib/v/parser/tests/division_by_zero_0b0_err.out

@@ -1,5 +0,0 @@
-vlib/v/parser/tests/division_by_zero_0b0_err.v:2:12: error: division by zero
-    1 | fn main() {
-    2 |     println(1/0b0)
-      |               ~~~
-    3 | }

vlib/v/parser/tests/division_by_zero_0b0_err.vv

@@ -1,3 +0,0 @@
-fn main() {
-	println(1/0b0)
-}

vlib/v/parser/tests/division_by_zero_0x0_err.out

@@ -1,5 +0,0 @@
-vlib/v/parser/tests/division_by_zero_0x0_err.v:2:12: error: division by zero
-    1 | fn main() {
-    2 |     println(1/0x0)
-      |               ~~~
-    3 | }

vlib/v/parser/tests/division_by_zero_0x0_err.vv

@@ -1,3 +0,0 @@
-fn main() {
-	println(1/0x0)
-}

vlib/v/parser/tests/division_by_zero_0x0_var_err.out

@@ -1,6 +0,0 @@
-vlib/v/parser/tests/division_by_zero_0x0_var_err.v:3:12: error: division by zero
-    1 | fn main() {
-    2 |     a := 0x0
-    3 |     println(1/a)
-      |               ^
-    4 | }

vlib/v/parser/tests/division_by_zero_0x0_var_err.vv

@@ -1,4 +0,0 @@
-fn main() {
-	a := 0x0
-	println(1/a)
-}

vlib/v/parser/tests/division_by_zero_float_var_err.out

@@ -1,6 +0,0 @@
-vlib/v/parser/tests/division_by_zero_float_var_err.v:3:14: error: division by zero
-    1 | fn main() {
-    2 |     a := 0.0
-    3 |     println(1.0/a)
-      |                 ^
-    4 | }

vlib/v/parser/tests/division_by_zero_float_var_err.vv

@@ -1,4 +0,0 @@
-fn main() {
-	a := 0.0
-	println(1.0/a)
-}

vlib/v/parser/tests/division_by_zero_int_var_err.out

@@ -1,6 +0,0 @@
-vlib/v/parser/tests/division_by_zero_int_var_err.v:3:12: error: division by zero
-    1 | fn main() {
-    2 |     a := 0
-    3 |     println(1/a)
-      |               ^
-    4 | }

vlib/v/parser/tests/division_by_zero_int_var_err.vv

@@ -1,4 +0,0 @@
-fn main() {
-	a := 0
-	println(1/a)
-}