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patch 9.0.1897: Vim9: confusing error with .= in compiled functions

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Problem:  Vim9: confusing error with .= in compiled functions
Solution: Check in error condition, if .= was attempted and in that case
          give a different error message.

closes: #12972
closes: #13066

Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Christian Brabandt
2023-09-11 20:08:50 +02:00
parent 6b9c202549
commit 504543f98b
3 changed files with 29 additions and 1 deletions
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9
src/vim9compile.c
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@@ -1669,7 +1669,14 @@ compile_lhs(
{
if (is_decl)
{
semsg(_(e_variable_already_declared_str), lhs->lhs_name);
// if we come here with what looks like an assignment like .=
// but which has been reject by assignment_len() from may_compile_assignment
// give a better error message
char_u *p = skipwhite(lhs->lhs_end);
if (p[0] == '.' && p[1] == '=')
emsg(_(e_dot_equal_not_supported_with_script_version_two));
else
semsg(_(e_variable_already_declared_str), lhs->lhs_name);
return FAIL;
}
}