From 59a9ea814fb92b730346480de1f628e7cd68d724 Mon Sep 17 00:00:00 2001
From: Taco de Wolff <tacodewolff@gmail.com>
Date: Fri, 26 May 2023 18:03:05 -0400
Subject: [PATCH] JS: add space between ---a when calling JS(), fixes #112

---
 js/ast.go     | 4 ++--
 js/js_test.go | 3 ++-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/js/ast.go b/js/ast.go
index 92e80d7..9de7556 100644
--- a/js/ast.go
+++ b/js/ast.go
@@ -3569,7 +3569,7 @@ func (n UnaryExpr) String() string {
 func (n UnaryExpr) JS() string {
 	if n.Op == PostIncrToken || n.Op == PostDecrToken {
 		return n.X.JS() + n.Op.String()
-	} else if IsIdentifierName(n.Op) {
+	} else if unary, ok := n.X.(*UnaryExpr); ok && (n.Op == PosToken && unary.Op == PreIncrToken || n.Op == NegToken && unary.Op == PreDecrToken) || IsIdentifierName(n.Op) {
 		return n.Op.String() + " " + n.X.JS()
 	}
 	return n.Op.String() + n.X.JS()
@@ -3587,7 +3587,7 @@ func (n UnaryExpr) JSWriteTo(w io.Writer) (i int, err error) {
 		wn, err = w.Write(n.Op.Bytes())
 		i += wn
 		return
-	} else if IsIdentifierName(n.Op) {
+	} else if unary, ok := n.X.(UnaryExpr); ok && (n.Op == PosToken && unary.Op == PreIncrToken || n.Op == NegToken && unary.Op == PreDecrToken) || IsIdentifierName(n.Op) {
 		wn, err = w.Write(n.Op.Bytes())
 		i += wn
 		if err != nil {
diff --git a/js/js_test.go b/js/js_test.go
index 564087b..278ed81 100644
--- a/js/js_test.go
+++ b/js/js_test.go
@@ -182,7 +182,8 @@ func TestJS(t *testing.T) {
 		{"x = y?.z;", "x = y?.z; "},
 
 		// UnaryExpr
-		{"x = 1 + 1;", "x = 1 + 1; "},
+		{"x = -a;", "x = -a; "},
+		{"x = - --a;", "x = - --a; "},
 
 		// BinaryExpr
 		{"a << b;", "a << b; "},