From 08bf6981f5768897707851dc011d3898e4bd5c1a Mon Sep 17 00:00:00 2001
From: Matthew Woehlke <matthew.woehlke@kitware.com>
Date: Fri, 7 Aug 2026 17:00:10 -0400
Subject: [PATCH] Allow changing only JSON output whitespace options

Add a secondary constructor to `JSONOutputArchive::Options` that allows
users to change the whitespace options while retaining the default
floating point precision.
---
 include/cereal/archives/json.hpp | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/include/cereal/archives/json.hpp b/include/cereal/archives/json.hpp
index f86bcd40e..c4d63bc1f 100644
--- a/include/cereal/archives/json.hpp
+++ b/include/cereal/archives/json.hpp
@@ -123,7 +123,7 @@ namespace cereal
           static Options Default(){ return Options(); }
 
           //! Default options with no indentation
-          static Options NoIndent(){ return Options( JSONWriter::kDefaultMaxDecimalPlaces, IndentChar::space, 0 ); }
+          static Options NoIndent(){ return Options( IndentChar::space, 0 ); }
 
           //! The character to use for indenting
           enum class IndentChar : char
@@ -139,13 +139,23 @@ namespace cereal
               @param indentChar The type of character to indent with
               @param indentLength The number of indentChar to use for indentation
                              (0 corresponds to no indentation) */
-          explicit Options( int precision = JSONWriter::kDefaultMaxDecimalPlaces,
+          explicit Options( int precision,
                             IndentChar indentChar = IndentChar::space,
                             unsigned int indentLength = 4 ) :
             itsPrecision( precision ),
             itsIndentChar( static_cast<char>(indentChar) ),
             itsIndentLength( indentLength ) { }
 
+          //! Specify specific options for the JSONOutputArchive
+          /*! @param indentChar The type of character to indent with
+              @param indentLength The number of indentChar to use for indentation
+                             (0 corresponds to no indentation) */
+          explicit Options( IndentChar indentChar = IndentChar::space,
+                            unsigned int indentLength = 4 ) :
+            itsPrecision( JSONWriter::kDefaultMaxDecimalPlaces ),
+            itsIndentChar( static_cast<char>(indentChar) ),
+            itsIndentLength( indentLength ) { }
+
         private:
           friend class JSONOutputArchive;
           int itsPrecision;