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Improve error reporting in new parser. Tests now pass.

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This commit is contained in:
ridiculousfish 2013-12-08 22:29:02 -08:00
parent 7a3f5afee7
commit 383b6aabf5
1 changed files with 29 additions and 13 deletions
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42
parse_tree.cpp
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@ -608,7 +608,7 @@ void parse_ll_t::parse_error_unbalancing_token(parse_token_t token)
break; break;
case parse_keyword_case: case parse_keyword_case:
this->parse_error(token, parse_error_unbalancing_case, L"'case' builtin not inside of if block"); this->parse_error(token, parse_error_unbalancing_case, L"'case' builtin not inside of switch block");
break; break;
default: default:
@ -712,20 +712,36 @@ bool parse_ll_t::top_node_handle_terminal_types(parse_token_t token)
// Failure // Failure
if (stack_top.type == parse_token_type_string && token.type == parse_token_type_string) if (stack_top.type == parse_token_type_string && token.type == parse_token_type_string)
{ {
// Must be different keywords. We should unify this with the 'matched' computation above. // Keyword failure. We should unify this with the 'matched' computation above.
assert(stack_top.keyword != parse_keyword_none && stack_top.keyword != token.keyword); assert(stack_top.keyword != parse_keyword_none && stack_top.keyword != token.keyword);
const wcstring expected = keyword_description(stack_top.keyword);
wcstring actual; // Check to see which keyword we got which was considered wrong
if (token.keyword == parse_keyword_none) switch (token.keyword)
{ {
// This is a random other string (not a keyword) // Some keywords are only valid in certain contexts. If this cascaded all the way down through the outermost job_list, it was not in a valid context.
this->parse_error(token, parse_error_generic, L"Expected keyword '%ls'", expected.c_str()); case parse_keyword_case:
} case parse_keyword_end:
else case parse_keyword_else:
{ this->parse_error_unbalancing_token(token);
// Got a real keyword we can report break;
const wcstring actual = (token.keyword == parse_keyword_none ? token.describe() : keyword_description(token.keyword));
this->parse_error(token, parse_error_generic, L"Expected keyword '%ls', instead got keyword '%ls'", expected.c_str(), actual.c_str()); case parse_keyword_none:
{
// This is a random other string (not a keyword)
const wcstring expected = keyword_description(stack_top.keyword);
this->parse_error(token, parse_error_generic, L"Expected keyword '%ls'", expected.c_str());
break;
}
default:
{
// Got a real keyword we can report
const wcstring actual = (token.keyword == parse_keyword_none ? token.describe() : keyword_description(token.keyword));
const wcstring expected = keyword_description(stack_top.keyword);
this->parse_error(token, parse_error_generic, L"Expected keyword '%ls', instead got keyword '%ls'", expected.c_str(), actual.c_str());
break;
}
} }
} }
else else