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detailed parser error reporting [wip - 1 example]

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This commit is contained in:
Roland Conybeare 2025-07-19 21:09:57 -05:00
commit 65a83cd77c
19 changed files with 256 additions and 84 deletions
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14
xo-tokenizer/include/xo/tokenizer/tokenizer_error.hpp
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@ -34,11 +34,11 @@ namespace xo {
* @p error_pos error location relative to token start
**/
tokenizer_error(const char * src_function,
const char * error_description,
std::string error_description,
const input_state_type & input_state,
size_t error_pos)
: src_function_{src_function},
error_description_{error_description},
error_description_{std::move(error_description)},
input_state_{input_state},
error_pos_{error_pos}
{
@ -53,7 +53,7 @@ namespace xo {
///@{
const char * src_function() const { return src_function_; }
const char * error_description() const { return error_description_; }
const std::string & error_description() const { return error_description_; }
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wchanges-meaning"
const input_state_type & input_state() const { return input_state_; }
@ -68,9 +68,9 @@ namespace xo {
///@{
/** true, except for a sentinel error object **/
bool is_error() const { return error_description_ != nullptr; }
bool is_error() const { return !error_description_.empty(); }
/** false except for object in sentinel state **/
bool is_not_an_error() const { return error_description_ == nullptr; }
bool is_not_an_error() const { return error_description_.empty(); }
/** Print representation to stream @p os. Intended for tokenizer diagnostics.
* For Schematika errors prefer @ref report
@ -89,7 +89,7 @@ namespace xo {
/** source location (in tokenizer) at which error identified **/
char const * src_function_ = nullptr;
/** static error description **/
char const * error_description_ = nullptr;
std::string error_description_;
/** input state associated with this error.
* Sufficient to precisely locate it with context.
**/
@ -117,7 +117,7 @@ namespace xo {
tokenizer_error<CharT>::report(std::ostream & os) const {
using namespace std;
if (error_description_) {
if (!error_description_.empty()) {
const char * prefix = "input: ";
/* input_state.current_pos: position of first character following preceding token.
* input_state.whitespace: whitespace between current_pos and start of failing token