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[PRISM] Better error messages for unwriteable targets

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This commit is contained in:
Kevin Newton 2024-05-01 17:33:22 -04:00
parent 4e8ae5d32a
commit 5d1e4cd249
2 changed files with 37 additions and 7 deletions
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37
prism/prism.c
View file

@ -12949,6 +12949,32 @@ parse_write_name(pm_parser_t *parser, pm_constant_id_t *name_field) {
*name_field = pm_constant_pool_insert_owned(&parser->constant_pool, name, length + 1);
}
/**
* Certain expressions are not targetable, but in order to provide a better
* experience we give a specific error message. In order to maintain as much
* information in the tree as possible, we replace them with local variable
* writes.
*/
static pm_node_t *
parse_unwriteable_target(pm_parser_t *parser, pm_node_t *target) {
switch (PM_NODE_TYPE(target)) {
case PM_SOURCE_ENCODING_NODE: pm_parser_err_node(parser, target, PM_ERR_EXPRESSION_NOT_WRITABLE_ENCODING); break;
case PM_FALSE_NODE: pm_parser_err_node(parser, target, PM_ERR_EXPRESSION_NOT_WRITABLE_FALSE); break;
case PM_SOURCE_FILE_NODE: pm_parser_err_node(parser, target, PM_ERR_EXPRESSION_NOT_WRITABLE_FILE); break;
case PM_SOURCE_LINE_NODE: pm_parser_err_node(parser, target, PM_ERR_EXPRESSION_NOT_WRITABLE_LINE); break;
case PM_NIL_NODE: pm_parser_err_node(parser, target, PM_ERR_EXPRESSION_NOT_WRITABLE_NIL); break;
case PM_SELF_NODE: pm_parser_err_node(parser, target, PM_ERR_EXPRESSION_NOT_WRITABLE_SELF); break;
case PM_TRUE_NODE: pm_parser_err_node(parser, target, PM_ERR_EXPRESSION_NOT_WRITABLE_TRUE); break;
default: break;
}
pm_constant_id_t name = pm_parser_constant_id_location(parser, target->location.start, target->location.end);
pm_local_variable_target_node_t *result = pm_local_variable_target_node_create(parser, &target->location, name, 0);
pm_node_destroy(parser, target);
return (pm_node_t *) result;
}
/**
* Convert the given node into a valid target node.
*/
@ -12957,6 +12983,17 @@ parse_target(pm_parser_t *parser, pm_node_t *target) {
switch (PM_NODE_TYPE(target)) {
case PM_MISSING_NODE:
return target;
case PM_SOURCE_ENCODING_NODE:
case PM_FALSE_NODE:
case PM_SOURCE_FILE_NODE:
case PM_SOURCE_LINE_NODE:
case PM_NIL_NODE:
case PM_SELF_NODE:
case PM_TRUE_NODE: {
// In these special cases, we have specific error messages and we
// will replace them with local variable writes.
return parse_unwriteable_target(parser, target);
}
case PM_CLASS_VARIABLE_READ_NODE:
assert(sizeof(pm_class_variable_target_node_t) == sizeof(pm_class_variable_read_node_t));
target->type = PM_CLASS_VARIABLE_TARGET_NODE;

7
test/.excludes-prism/TestParse.rb
View file

@ -1,14 +1,9 @@
exclude(:test_dynamic_constant_assignment, "unknown")
exclude(:test_else_without_rescue, "unknown")
exclude(:test_error_def_in_argument, "unknown")
exclude(:test_float, "unknown")
exclude(:test_global_variable, "unknown")
exclude(:test_here_document, "unknown")
exclude(:test_heredoc_unterminated_interpolation, "unknown")
exclude(:test_invalid_char, "unknown")
exclude(:test_location_of_invalid_token, "unknown")
exclude(:test_op_asgn1_with_block, "unknown")
exclude(:test_parse_string, "unknown")
exclude(:test_percent, "unknown")
exclude(:test_question, "unknown")
exclude(:test_shareable_constant_value_ignored, "unknown")
@ -19,10 +14,8 @@ exclude(:test_shareable_constant_value_unfrozen, "ractor support")
exclude(:test_shareable_constant_value_unshareable_literal, "ractor support")
exclude(:test_string, "unknown")
exclude(:test_truncated_source_line, "unknown")
exclude(:test_unassignable, "unknown")
exclude(:test_unexpected_eof, "unknown")
exclude(:test_unexpected_token_after_numeric, "unknown")
exclude(:test_unterminated_regexp_error, "unknown")
exclude(:test_unused_variable, "missing warning")
exclude(:test_void_value_in_rhs, "unknown")
exclude(:test_words, "unknown")