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lint: Use early exit/continue

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This commit is contained in:
Kurtis Rader 2016-10-30 20:26:10 -07:00
parent d441de33e5
commit 520f810bf9
1 changed files with 82 additions and 78 deletions
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160
src/parse_execution.cpp
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@ -372,38 +372,41 @@ parse_execution_result_t parse_execution_context_t::run_function_statement(
wcstring_list_t argument_list;
parse_execution_result_t result = this->determine_arguments(header, &argument_list, failglob);
if (result == parse_execution_success) {
// The function definition extends from the end of the header to the function end. It's not
// just the range of the contents because that loses comments - see issue #1710.
assert(block_end_command.has_source());
size_t contents_start = header.source_start + header.source_length;
size_t contents_end =
block_end_command.source_start; // 1 past the last character in the function definition
assert(contents_end >= contents_start);
// Swallow whitespace at both ends.
while (contents_start < contents_end && iswspace(this->src.at(contents_start))) {
contents_start++;
}
while (contents_start < contents_end && iswspace(this->src.at(contents_end - 1))) {
contents_end--;
}
assert(contents_end >= contents_start);
const wcstring contents_str =
wcstring(this->src, contents_start, contents_end - contents_start);
int definition_line_offset = this->line_offset_of_character_at_offset(contents_start);
wcstring error_str;
io_streams_t streams;
int err = builtin_function(*parser, streams, argument_list, contents_str,
definition_line_offset, &error_str);
proc_set_last_status(err);
if (!error_str.empty()) {
this->report_error(header, L"%ls", error_str.c_str());
result = parse_execution_errored;
}
if (result != parse_execution_success) {
return result;
}
// The function definition extends from the end of the header to the function end. It's not
// just the range of the contents because that loses comments - see issue #1710.
assert(block_end_command.has_source());
size_t contents_start = header.source_start + header.source_length;
size_t contents_end =
block_end_command.source_start; // 1 past the last character in the function definition
assert(contents_end >= contents_start);
// Swallow whitespace at both ends.
while (contents_start < contents_end && iswspace(this->src.at(contents_start))) {
contents_start++;
}
while (contents_start < contents_end && iswspace(this->src.at(contents_end - 1))) {
contents_end--;
}
assert(contents_end >= contents_start);
const wcstring contents_str =
wcstring(this->src, contents_start, contents_end - contents_start);
int definition_line_offset = this->line_offset_of_character_at_offset(contents_start);
wcstring error_str;
io_streams_t streams;
int err = builtin_function(*parser, streams, argument_list, contents_str,
definition_line_offset, &error_str);
proc_set_last_status(err);
if (!error_str.empty()) {
this->report_error(header, L"%ls", error_str.c_str());
result = parse_execution_errored;
}
return result;
}
@ -546,66 +549,67 @@ parse_execution_result_t parse_execution_context_t::run_switch_statement(
switch_values_expanded.size());
}
if (result == parse_execution_success) {
const wcstring &switch_value_expanded = switch_values_expanded.at(0).completion;
if (result != parse_execution_success) {
return result;
}
switch_block_t *sb = new switch_block_t();
parser->push_block(sb);
const wcstring &switch_value_expanded = switch_values_expanded.at(0).completion;
// Expand case statements.
const parse_node_t *case_item_list = get_child(statement, 3, symbol_case_item_list);
switch_block_t *sb = new switch_block_t();
parser->push_block(sb);
// Loop while we don't have a match but do have more of the list.
const parse_node_t *matching_case_item = NULL;
while (matching_case_item == NULL && case_item_list != NULL) {
if (should_cancel_execution(sb)) {
result = parse_execution_cancelled;
break;
}
// Expand case statements.
const parse_node_t *case_item_list = get_child(statement, 3, symbol_case_item_list);
// Get the next item and the remainder of the list.
const parse_node_t *case_item =
tree.next_node_in_node_list(*case_item_list, symbol_case_item, &case_item_list);
if (case_item == NULL) {
// No more items.
break;
}
// Loop while we don't have a match but do have more of the list.
const parse_node_t *matching_case_item = NULL;
while (matching_case_item == NULL && case_item_list != NULL) {
if (should_cancel_execution(sb)) {
result = parse_execution_cancelled;
break;
}
// Pull out the argument list.
const parse_node_t &arg_list = *get_child(*case_item, 1, symbol_argument_list);
// Get the next item and the remainder of the list.
const parse_node_t *case_item =
tree.next_node_in_node_list(*case_item_list, symbol_case_item, &case_item_list);
if (case_item == NULL) {
// No more items.
break;
}
// Expand arguments. A case item list may have a wildcard that fails to expand to
// anything. We also report case errors, but don't stop execution; i.e. a case item that
// contains an unexpandable process will report and then fail to match.
wcstring_list_t case_args;
parse_execution_result_t case_result =
this->determine_arguments(arg_list, &case_args, failglob);
if (case_result == parse_execution_success) {
for (size_t i = 0; i < case_args.size(); i++) {
const wcstring &arg = case_args.at(i);
// Pull out the argument list.
const parse_node_t &arg_list = *get_child(*case_item, 1, symbol_argument_list);
// Unescape wildcards so they can be expanded again.
wcstring unescaped_arg = parse_util_unescape_wildcards(arg);
bool match = wildcard_match(switch_value_expanded, unescaped_arg);
// Expand arguments. A case item list may have a wildcard that fails to expand to
// anything. We also report case errors, but don't stop execution; i.e. a case item that
// contains an unexpandable process will report and then fail to match.
wcstring_list_t case_args;
parse_execution_result_t case_result =
this->determine_arguments(arg_list, &case_args, failglob);
if (case_result == parse_execution_success) {
for (size_t i = 0; i < case_args.size(); i++) {
const wcstring &arg = case_args.at(i);
// If this matched, we're done.
if (match) {
matching_case_item = case_item;
break;
}
// Unescape wildcards so they can be expanded again.
wcstring unescaped_arg = parse_util_unescape_wildcards(arg);
bool match = wildcard_match(switch_value_expanded, unescaped_arg);
// If this matched, we're done.
if (match) {
matching_case_item = case_item;
break;
}
}
}
if (result == parse_execution_success && matching_case_item != NULL) {
// Success, evaluate the job list.
const parse_node_t *job_list = get_child(*matching_case_item, 3, symbol_job_list);
result = this->run_job_list(*job_list, sb);
}
parser->pop_block(sb);
}
if (result == parse_execution_success && matching_case_item != NULL) {
// Success, evaluate the job list.
const parse_node_t *job_list = get_child(*matching_case_item, 3, symbol_job_list);
result = this->run_job_list(*job_list, sb);
}
parser->pop_block(sb);
return result;
}