vim-patch:8.2.1047: Vim9: script cannot use line continuation like :def function

Problem:    Vim9: script cannot use line continuation like in a :def function.
Solution:   Pass the getline function pointer to the eval() functions.  Use it
            for addition and multiplication operators.

https://github.com/vim/vim/commit/5409f5d8c95007216ae1190565a7a8ee9ebd7100

Omit source_nextline() and eval_next_non_blank(): Vim9 script only.

N/A patches for version.c:

vim-patch:8.2.1048: build failure without the eval feature

Problem:    Build failure without the eval feature.
Solution:   Add dummy typedef.

https://github.com/vim/vim/commit/9d40c63c7dc8c3eb3886c58dcd334bc7f37eceba

vim-patch:8.2.1052: build failure with older compilers

Problem:    Build failure with older compilers.
Solution:   Move declaration to start of block.

https://github.com/vim/vim/commit/7acde51832f383f9a6d2e740cd0420b433ea841a

Co-authored-by: Bram Moolenaar <Bram@vim.org>

1 files changed, 8 insertions, 3 deletions

diff --git a/src/nvim/eval/vars.c b/src/nvim/eval/vars.c
index a3dc0cfc04..02e526d7b6 100644
--- a/src/nvim/eval/vars.c
+++ b/src/nvim/eval/vars.c
@@ -255,13 +255,18 @@ void ex_let(exarg_T *eap)
     if (eap->skip) {
       emsg_skip++;
     }
-    int eval_flags = eap->skip ? 0 : EVAL_EVALUATE;
-    i = eval0(expr, &rettv, &eap->nextcmd, eval_flags);
+    evalarg_T evalarg = {
+      .eval_flags = eap->skip ? 0 : EVAL_EVALUATE,
+      .eval_cookie = eap->getline == getsourceline ? eap->cookie : NULL,
+    };
+    i = eval0(expr, &rettv, &eap->nextcmd, &evalarg);
+    if (eap->skip) {
+      emsg_skip--;
+    }
     if (eap->skip) {
       if (i != FAIL) {
         tv_clear(&rettv);
       }
-      emsg_skip--;
     } else if (i != FAIL) {
       (void)ex_let_vars(eap->arg, &rettv, false, semicolon, var_count, is_const, op);
       tv_clear(&rettv);