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Improve error messages for compile time known bounds checking

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This commit is contained in:
gingerBill
2022-09-22 00:30:10 +01:00
parent 0dce7769f4
commit 3aea9a7c20
2 changed files with 8 additions and 7 deletions
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12
src/check_expr.cpp
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@@ -3922,7 +3922,9 @@ bool check_index_value(CheckerContext *c, Type *main_type, bool open_range, Ast
}
} else if (!is_type_integer(operand.type) && !is_type_enum(operand.type)) {
gbString expr_str = expr_to_string(operand.expr);
error(operand.expr, "Index '%s' must be an integer", expr_str);
gbString type_str = type_to_string(operand.type);
error(operand.expr, "Index '%s' must be an integer, got %s", expr_str, type_str);
gb_string_free(type_str);
gb_string_free(expr_str);
if (value) *value = 0;
return false;
@@ -3932,8 +3934,9 @@ bool check_index_value(CheckerContext *c, Type *main_type, bool open_range, Ast
(c->state_flags & StateFlag_no_bounds_check) == 0) {
BigInt i = exact_value_to_integer(operand.value).value_integer;
if (i.sign && !is_type_enum(index_type) && !is_type_multi_pointer(main_type)) {
String idx_str = big_int_to_string(temporary_allocator(), &i);
gbString expr_str = expr_to_string(operand.expr);
error(operand.expr, "Index '%s' cannot be a negative value", expr_str);
error(operand.expr, "Index '%s' cannot be a negative value, got %.*s", expr_str, LIT(idx_str));
gb_string_free(expr_str);
if (value) *value = 0;
return false;
@@ -3964,7 +3967,7 @@ bool check_index_value(CheckerContext *c, Type *main_type, bool open_range, Ast
if (out_of_bounds) {
gbString expr_str = expr_to_string(operand.expr);
if (lo_str.len > 0) {
error(operand.expr, "Index '%s' is out of bounds range %.*s .. %.*s", expr_str, LIT(lo_str), LIT(hi_str));
error(operand.expr, "Index '%s' is out of bounds range %.*s ..= %.*s", expr_str, LIT(lo_str), LIT(hi_str));
} else {
gbString index_type_str = type_to_string(index_type);
error(operand.expr, "Index '%s' is out of bounds range of enum type %s", expr_str, index_type_str);
@@ -3994,8 +3997,9 @@ bool check_index_value(CheckerContext *c, Type *main_type, bool open_range, Ast
}
if (out_of_bounds) {
String idx_str = big_int_to_string(temporary_allocator(), &i);
gbString expr_str = expr_to_string(operand.expr);
error(operand.expr, "Index '%s' is out of bounds range 0..<%lld", expr_str, max_count);
error(operand.expr, "Index '%s' is out of bounds range 0..<%lld, got %.*s", expr_str, max_count, LIT(idx_str));
gb_string_free(expr_str);
return false;
}