From 86d682017d9c83959a27a68d875e55bc41f1ea6f Mon Sep 17 00:00:00 2001
From: Luke Shumaker <lukeshu@lukeshu.com>
Date: Fri, 3 Feb 2023 23:03:06 -0700
Subject: fixup! Invent "barriers" instead of nesting parsers

---
 reencode.go | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/reencode.go b/reencode.go
index eae80db..b135fb8 100644
--- a/reencode.go
+++ b/reencode.go
@@ -99,13 +99,14 @@ type ReEncoder struct {
 	inputPos int64
 
 	// state: .handleRune
-	lastNonSpace internal.RuneType
-	wasNumber    bool
-	curIndent    int
-	uhex         [4]byte // "\uABCD"-encoded characters in strings
-	fracZeros    int64
-	expZero      bool
-	specu        *speculation
+	lastNonSpace       internal.RuneType
+	lastNonSpaceNonEOF internal.RuneType
+	wasNumber          bool
+	curIndent          int
+	uhex               [4]byte // "\uABCD"-encoded characters in strings
+	fracZeros          int64
+	expZero            bool
+	specu              *speculation
 
 	// state: .pushBarrier and .popBarrier
 	stackInputPos []int64
@@ -295,6 +296,7 @@ func (enc *ReEncoder) popWriteBarrier() {
 	enc.par.PopBarrier()
 	enc.inputPos += enc.stackInputPos[len(enc.stackInputPos)-1]
 	enc.stackInputPos = enc.stackInputPos[:len(enc.stackInputPos)-1]
+	enc.lastNonSpace = enc.lastNonSpaceNonEOF
 }
 
 // internal ////////////////////////////////////////////////////////////////////
@@ -532,6 +534,9 @@ func (enc *ReEncoder) handleRuneMain(c rune, t internal.RuneType) error {
 
 	if t != internal.RuneTypeSpace {
 		enc.lastNonSpace = t
+		if t != internal.RuneTypeEOF {
+			enc.lastNonSpaceNonEOF = t
+		}
 	}
 	return err
 }
-- 
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