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patch 8.2.2010: Vim9: compiling fails for unreachable return statement

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Problem:    Vim9: compiling fails for unreachable return statement.
Solution:   Fix it. (closes #7319)
This commit is contained in:
Bram Moolenaar
2020-11-18 16:35:02 +01:00
parent 382319211a
commit 8e02faf4e9
3 changed files with 24 additions and 14 deletions
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6
src/testdir/test_vim9_disassemble.vim
View File

@@ -749,6 +749,9 @@ def Test_disassemble_const_expr()
enddef
def ReturnInIf(): string
if 1 < 0
return "maybe"
endif
if g:cond
return "yes"
else
@@ -759,6 +762,9 @@ enddef
def Test_disassemble_return_in_if()
var instr = execute('disassemble ReturnInIf')
assert_match('ReturnInIf\_s*' ..
'if 1 < 0\_s*' ..
' return "maybe"\_s*' ..
'endif\_s*' ..
'if g:cond\_s*' ..
'0 LOADG g:cond\_s*' ..
'1 COND2BOOL\_s*' ..

2
src/version.c
View File

@@ -750,6 +750,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
2010,
/**/
2009,
/**/

30
src/vim9compile.c
View File

@@ -4694,21 +4694,24 @@ compile_return(char_u *arg, int set_return_type, cctx_T *cctx)
if (compile_expr0(&p, cctx) == FAIL)
return NULL;
stack_type = ((type_T **)stack->ga_data)[stack->ga_len - 1];
if (set_return_type)
cctx->ctx_ufunc->uf_ret_type = stack_type;
else
if (cctx->ctx_skip != SKIP_YES)
{
if (cctx->ctx_ufunc->uf_ret_type->tt_type == VAR_VOID
&& stack_type->tt_type != VAR_VOID
&& stack_type->tt_type != VAR_UNKNOWN)
stack_type = ((type_T **)stack->ga_data)[stack->ga_len - 1];
if (set_return_type)
cctx->ctx_ufunc->uf_ret_type = stack_type;
else
{
emsg(_(e_returning_value_in_function_without_return_type));
return NULL;
}
if (need_type(stack_type, cctx->ctx_ufunc->uf_ret_type, -1,
if (cctx->ctx_ufunc->uf_ret_type->tt_type == VAR_VOID
&& stack_type->tt_type != VAR_VOID
&& stack_type->tt_type != VAR_UNKNOWN)
{
emsg(_(e_returning_value_in_function_without_return_type));
return NULL;
}
if (need_type(stack_type, cctx->ctx_ufunc->uf_ret_type, -1,
cctx, FALSE, FALSE) == FAIL)
return NULL;
return NULL;
}
}
}
else
@@ -4725,8 +4728,7 @@ compile_return(char_u *arg, int set_return_type, cctx_T *cctx)
// No argument, return zero.
generate_PUSHNR(cctx, 0);
}
if (generate_instr(cctx, ISN_RETURN) == NULL)
if (cctx->ctx_skip != SKIP_YES && generate_instr(cctx, ISN_RETURN) == NULL)
return NULL;
// "return val | endif" is possible