From 2770077cb0bb3c8b5babfb0a2e09c2fbd5e92d28 Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@medvednikov.com>
Date: Sat, 6 Jun 2020 16:05:16 +0200
Subject: [PATCH] fmt: x.foo!() experiment

---
 vlib/v/ast/ast.v         |  1 -
 vlib/v/checker/checker.v |  2 +-
 vlib/v/fmt/fmt.v         | 20 +++++++++++++++++++-
 3 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/vlib/v/ast/ast.v b/vlib/v/ast/ast.v
index 35f229e635..1b0598ef87 100644
--- a/vlib/v/ast/ast.v
+++ b/vlib/v/ast/ast.v
@@ -245,7 +245,6 @@ pub:
 pub mut:
 	name               string
 	is_method          bool
-	is_mut             bool // !
 	args               []CallArg
 	expected_arg_types []table.Type
 	language           table.Language
diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index 2be05fe81a..d9f14f6158 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -799,7 +799,7 @@ pub fn (mut c Checker) call_method(mut call_expr ast.CallExpr) table.Type {
 		}
 		if method.args[0].is_mut {
 			c.fail_if_immutable(call_expr.left)
-			call_expr.is_mut = true
+			// call_expr.is_mut = true
 		}
 		if method.return_type == table.void_type && method.ctdefine.len > 0 && method.ctdefine !in
 			c.pref.compile_defines {
diff --git a/vlib/v/fmt/fmt.v b/vlib/v/fmt/fmt.v
index c073989c08..ce70e6b44c 100644
--- a/vlib/v/fmt/fmt.v
+++ b/vlib/v/fmt/fmt.v
@@ -888,6 +888,24 @@ pub fn (mut f Fmt) call_expr(node ast.CallExpr) {
 	}
 	*/
 	if node.is_method {
+		/*
+		// x.foo!() experiment
+		mut is_mut := false
+		if node.left is ast.Ident {
+			scope := f.file.scope.innermost(node.pos.pos)
+			x := node.left as ast.Ident
+			var := scope.find_var(x.name) or {
+				panic(err)
+			}
+			println(var.typ)
+			if var.typ != 0 {
+				sym := f.table.get_type_symbol(var.typ)
+				if method := f.table.type_find_method(sym, node.name) {
+					is_mut = method.args[0].is_mut
+				}
+			}
+		}
+		*/
 		if node.left is ast.Ident {
 			it := node.left as ast.Ident
 			// `time.now()` without `time imported` is processed as a method call with `time` being
@@ -910,7 +928,7 @@ pub fn (mut f Fmt) call_expr(node ast.CallExpr) {
 		f.write('.' + node.name + '(')
 		f.call_args(node.args)
 		f.write(')')
-		if node.is_mut {
+		if is_mut {
 			// f.write('!')
 		}
 		f.or_expr(node.or_block)