From 0c06ca3c3fb9ab609fcd94cd7a56f9838e034cae Mon Sep 17 00:00:00 2001
From: ridiculousfish <rf@fishshell.com>
Date: Fri, 24 Sep 2021 21:09:28 -0700
Subject: [PATCH] Mark parser_t::principal as const

---
 src/parser.cpp | 2 +-
 src/parser.h   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/parser.cpp b/src/parser.cpp
index ff94fb581..078046cac 100644
--- a/src/parser.cpp
+++ b/src/parser.cpp
@@ -97,7 +97,7 @@ parser_t::parser_t() : parser_t(env_stack_t::principal_ref()) {}
 // Out of line destructor to enable forward declaration of parse_execution_context_t
 parser_t::~parser_t() = default;
 
-std::shared_ptr<parser_t> parser_t::principal{new parser_t()};
+const std::shared_ptr<parser_t> parser_t::principal{new parser_t()};
 
 parser_t &parser_t::principal_parser() {
     ASSERT_IS_MAIN_THREAD();
diff --git a/src/parser.h b/src/parser.h
index 2e87a404d..46811cf67 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -283,7 +283,7 @@ class parser_t : public std::enable_shared_from_this<parser_t> {
     parser_t(std::shared_ptr<env_stack_t> vars);
 
     /// The main parser.
-    static std::shared_ptr<parser_t> principal;
+    static const std::shared_ptr<parser_t> principal;
 
    public:
     // No copying allowed.