From 249fa95eab6c80267bb753a52481bc0315cb8737 Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@medvednikov.com>
Date: Sat, 29 Jun 2019 11:41:17 +0200
Subject: [PATCH] Revert 'compiler: allow mut passed as argument to be
 modified'. This broke

---
 compiler/parser.v  |  3 +--
 compiler/scanner.v | 21 ---------------------
 2 files changed, 1 insertion(+), 23 deletions(-)

diff --git a/compiler/parser.v b/compiler/parser.v
index 64db40583f..daf864a23c 100644
--- a/compiler/parser.v
+++ b/compiler/parser.v
@@ -1197,7 +1197,7 @@ fn (p mut Parser) name_expr() string {
 	hack_lit := p.lit
 	// amp
 	ptr := p.tok == AMP
-	mut deref := p.tok == MUL
+	deref := p.tok == MUL
 	if ptr || deref {
 		p.next()
 	}
@@ -1241,7 +1241,6 @@ fn (p mut Parser) name_expr() string {
 	// Variable
 	v := p.cur_fn.find_var(name)
 	if v.name.len != 0 {
-		deref = deref || (v.is_arg && v.is_mut && is_mutable_type(v.typ))
 		if ptr {
 			p.gen('& /*vvar*/ ')
 		}
diff --git a/compiler/scanner.v b/compiler/scanner.v
index 2391ee551d..eb4ba104a1 100644
--- a/compiler/scanner.v
+++ b/compiler/scanner.v
@@ -713,24 +713,3 @@ fn (s mut Scanner) create_type_string(T Type, name string) {
 fn (p mut Parser) create_type_string(T Type, name string) {
 	p.scanner.create_type_string(T, name)
 }
-
-//Checks if mut type can be dereferenced to be modified
-fn is_mutable_type(typ string) bool {
-	if typ == 'bool*' {
-		return true
-	}
-	if typ == 'int*' || typ == 'rune*' || typ == 'i8*' ||
-	   typ == 'i16*' || typ == 'i32*' || typ == 'i64*' {
-		return true
-	}
-	if typ == 'byte*' || typ == 'u8*' || typ == 'u16*' ||
-	   typ == 'u32*' || typ == 'u64*' {
-		return true
-	}
-	if typ == 'f32*' || typ == 'f64*' {
-		return true
-	}
-	if typ == 'string*' {
-		return true
-	}
-}