commit f681cfb90b972cb347b3d707c87e48f8accd0e2a
author Bram Moolenaar <Bram@vim.org> Mon Feb 07 20:30:57 2022 +0000
committer Bram Moolenaar <Bram@vim.org> Mon Feb 07 20:30:57 2022 +0000
tree dec6119e3cede17c28e604dbabfc01ebfc491803
parent 7aca5ca6763e50d2c23953b20e30fca7457c9abf

patch 8.2.4323: Vim9: nested function name can start with "_"

Problem:    Vim9: nested function name can start with "_".
Solution:   Use same rule for function name for nested functions.
            (closes #9713)

src/vim9compile.c

diff --git a/src/vim9compile.c b/src/vim9compile.c
index d0479a5..080a53c 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -886,6 +886,11 @@
     }
     if (check_defined(name_start, name_end - name_start, cctx, FALSE) == FAIL)
 	return NULL;
+    if (!ASCII_ISUPPER(is_global ? name_start[2] : name_start[0]))
+    {
+	semsg(_(e_function_name_must_start_with_capital_or_s_str), name_start);
+	return NULL;
+    }
 
     eap->arg = name_end;
     fill_exarg_from_cctx(eap, cctx);