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API: TRY_WRAP() for "abort-causing non-exception errors"

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- Introduce TRY_WRAP() until we have an *architectural* solution.
  - TODO: bfredl idea: prepare error-handling at "top level" (nv_event).
- nvim_paste(): Revert luaeval() hack (see parent commit).
  - With TRY_WRAP() in nvim_put(), 'nomodifiable' error now correctly
    "bubbles up".
This commit is contained in:
Justin M. Keyes
2019-08-27 05:19:36 +02:00
parent 46aa254bf3
commit 3157baed83
3 changed files with 39 additions and 52 deletions
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63
src/nvim/api/vim.c
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@@ -54,6 +54,20 @@
# include "api/vim.c.generated.h"
#endif
// `msg_list` controls the collection of abort-causing non-exception errors,
// which would otherwise be ignored. This pattern is from do_cmdline().
//
// TODO(bfredl): prepare error-handling at "top level" (nv_event).
#define TRY_WRAP(code) \
do { \
struct msglist **saved_msg_list = msg_list; \
struct msglist *private_msg_list; \
msg_list = &private_msg_list; \
private_msg_list = NULL; \
code \
msg_list = saved_msg_list; /* Restore the exception context. */ \
} while (0)
void api_vim_init(void)
FUNC_API_NOEXPORT
{
@@ -392,13 +406,7 @@ Object nvim_eval(String expr, Error *err)
static int recursive = 0; // recursion depth
Object rv = OBJECT_INIT;
// `msg_list` controls the collection of abort-causing non-exception errors,
// which would otherwise be ignored. This pattern is from do_cmdline().
struct msglist **saved_msg_list = msg_list;
struct msglist *private_msg_list;
msg_list = &private_msg_list;
private_msg_list = NULL;
TRY_WRAP({
// Initialize `force_abort` and `suppress_errthrow` at the top level.
if (!recursive) {
force_abort = false;
@@ -423,8 +431,8 @@ Object nvim_eval(String expr, Error *err)
}
tv_clear(&rettv);
msg_list = saved_msg_list; // Restore the exception context.
recursive--;
});
return rv;
}
@@ -474,13 +482,7 @@ static Object _call_function(String fn, Array args, dict_T *self, Error *err)
}
}
// `msg_list` controls the collection of abort-causing non-exception errors,
// which would otherwise be ignored. This pattern is from do_cmdline().
struct msglist **saved_msg_list = msg_list;
struct msglist *private_msg_list;
msg_list = &private_msg_list;
private_msg_list = NULL;
TRY_WRAP({
// Initialize `force_abort` and `suppress_errthrow` at the top level.
if (!recursive) {
force_abort = false;
@@ -502,8 +504,8 @@ static Object _call_function(String fn, Array args, dict_T *self, Error *err)
rv = vim_to_object(&rettv);
}
tv_clear(&rettv);
msg_list = saved_msg_list; // Restore the exception context.
recursive--;
});
free_vim_args:
while (i > 0) {
@@ -1238,7 +1240,6 @@ Boolean nvim_paste(String data, Integer phase, Error *err)
return false;
}
Array args = ARRAY_DICT_INIT;
Array args2 = ARRAY_DICT_INIT;
Object rv = OBJECT_INIT;
if (phase == -1 || phase == 1) { // Start of paste-stream.
draining = false;
@@ -1249,9 +1250,8 @@ Boolean nvim_paste(String data, Integer phase, Error *err)
Array lines = string_to_array(data);
ADD(args, ARRAY_OBJ(lines));
ADD(args, INTEGER_OBJ(phase));
ADD(args2, STRING_OBJ(cstr_to_string("vim.paste(_A[1], _A[2])")));
ADD(args2, ARRAY_OBJ(args2));
rv = nvim_call_function(STATIC_CSTR_AS_STRING("luaeval"), args2, err);
rv = nvim_execute_lua(STATIC_CSTR_AS_STRING("return vim.paste(...)"), args,
err);
if (ERROR_SET(err)) {
draining = true;
goto theend;
@@ -1278,7 +1278,8 @@ Boolean nvim_paste(String data, Integer phase, Error *err)
AppendCharToRedobuff(ESC); // Dot-repeat.
}
theend:
api_free_array(args2);
api_free_object(rv);
api_free_array(args);
if (cancel || phase == -1 || phase == 3) { // End of paste-stream.
draining = false;
// XXX: Tickle main loop to ensure cursor is updated.
@@ -1310,10 +1311,6 @@ void nvim_put(ArrayOf(String) lines, String type, Boolean after,
api_set_error(err, kErrorTypeValidation, "Invalid type: '%s'", type.data);
goto cleanup;
}
if (!MODIFIABLE(curbuf)) {
api_set_error(err, kErrorTypeException, "Buffer is not 'modifiable'");
goto cleanup;
}
if (lines.size == 0) {
goto cleanup; // Nothing to do.
}
@@ -1331,13 +1328,15 @@ void nvim_put(ArrayOf(String) lines, String type, Boolean after,
finish_yankreg_from_object(reg, false);
bool VIsual_was_active = VIsual_active;
msg_silent++; // Avoid "N more lines" message.
do_put(0, reg,
after ? FORWARD : BACKWARD, 1,
follow ? PUT_CURSEND : 0);
msg_silent--;
VIsual_active = VIsual_was_active;
TRY_WRAP({
try_start();
bool VIsual_was_active = VIsual_active;
msg_silent++; // Avoid "N more lines" message.
do_put(0, reg, after ? FORWARD : BACKWARD, 1, follow ? PUT_CURSEND : 0);
msg_silent--;
VIsual_active = VIsual_was_active;
try_end(err);
});
cleanup:
free_register(reg);