From 21805ea2a5ed0f19bf3395c74011666e8108474b Mon Sep 17 00:00:00 2001
From: zakuro <z@kuro.red>
Date: Sun, 27 Dec 2020 19:22:16 +0900
Subject: [PATCH] all: make eprint[ln] behave same as print[ln] (#7595)

---
 vlib/builtin/js/builtin.v                             | 4 ++--
 vlib/v/checker/checker.v                              | 4 ++--
 vlib/v/gen/fn.v                                       | 4 ++--
 vlib/v/tests/print_test.v                             | 1 +
 vlib/v/tests/vargs_auto_str_method_and_println_test.v | 6 ++++++
 5 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/vlib/builtin/js/builtin.v b/vlib/builtin/js/builtin.v
index 081ad60638..9491e2bf3a 100644
--- a/vlib/builtin/js/builtin.v
+++ b/vlib/builtin/js/builtin.v
@@ -22,13 +22,13 @@ pub fn print(s any) {
 }
 
 pub fn eprintln(s any) {
-	JS.console.error(s)
+	JS.console.error(s.toString())
 }
 
 pub fn eprint(s any) {
 	// TODO
 	// $if js.node {
-		JS.process.stderr.write(s)
+		JS.process.stderr.write(s.toString())
 	// } $else {
 	//	panic('Cannot `eprint` in a browser, use `eprintln` instead')
 	// }
diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index b47b8b5fe9..8929ead1bf 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -1589,8 +1589,8 @@ pub fn (mut c Checker) call_fn(mut call_expr ast.CallExpr) table.Type {
 			unexpected_arguments_pos)
 		return f.return_type
 	}
-	// println can print anything
-	if fn_name in ['println', 'print'] && call_expr.args.len > 0 {
+	// println / eprintln can print anything
+	if fn_name in ['println', 'print', 'eprintln', 'eprint'] && call_expr.args.len > 0 {
 		c.expected_type = table.string_type
 		call_expr.args[0].typ = c.expr(call_expr.args[0].expr)
 		/*
diff --git a/vlib/v/gen/fn.v b/vlib/v/gen/fn.v
index 017585a657..c05d80715a 100644
--- a/vlib/v/gen/fn.v
+++ b/vlib/v/gen/fn.v
@@ -501,8 +501,8 @@ fn (mut g Gen) fn_call(node ast.CallExpr) {
 		}
 	}
 	mut name := node.name
-	is_print := name == 'println' || name == 'print'
-	print_method := if name == 'println' { 'println' } else { 'print' }
+	is_print := name in ['print', 'println', 'eprint', 'eprintln']
+	print_method := name
 	is_json_encode := name == 'json.encode'
 	is_json_decode := name == 'json.decode'
 	g.is_json_fn = is_json_encode || is_json_decode
diff --git a/vlib/v/tests/print_test.v b/vlib/v/tests/print_test.v
index 18c9360d1c..914269c256 100644
--- a/vlib/v/tests/print_test.v
+++ b/vlib/v/tests/print_test.v
@@ -1,3 +1,4 @@
 fn test_print() {
 	println(2.0)
+	eprintln(2.0)
 }
diff --git a/vlib/v/tests/vargs_auto_str_method_and_println_test.v b/vlib/v/tests/vargs_auto_str_method_and_println_test.v
index 5d6a249ae7..77a9578476 100644
--- a/vlib/v/tests/vargs_auto_str_method_and_println_test.v
+++ b/vlib/v/tests/vargs_auto_str_method_and_println_test.v
@@ -10,6 +10,8 @@ fn test_autoprint_string_vargs() {
 fn add_s(column string, other_columns ...string) {
 	println(column)
 	println(other_columns)
+	eprintln(column)
+	eprintln(other_columns)
 }
 
 //
@@ -23,6 +25,8 @@ fn test_autoprint_int_vargs() {
 fn add_i(column int, other_columns ...int) {
 	println(column)
 	println(other_columns)
+	eprintln(column)
+	eprintln(other_columns)
 }
 
 //
@@ -41,4 +45,6 @@ fn test_autoprint_struct_vargs() {
 fn add_point(column Point, other_columns ...Point) {
 	println(column)
 	println(other_columns)
+	eprintln(column)
+	eprintln(other_columns)
 }