How to do good syntax error handling? about packcc

[arithy]

The example TinyC might be helpful to find the solution for precise counting rows and columns.
It uses the customized macro PCC_GETCHAR() with the text reader function system__read_source_file(). In this function, line break positions in bytes are recorded by calling append_line_head_() while fetching byte characters from an input text. The parsing positions in the input text can be detected using the predefined variables $0s and $0e (see README.md). The row number and the column number are computed in the function compute_line_and_column_() using line break positions and the parsing position. If not supporting multibyte characters, the code below

count_characters_(obj->source.text.p, obj->source.line.p[i - 1], pos) + 1

can be simplified with

pos - obj->source.line.p[i - 1] + 1

Unless considering multibyte characters, the input text needn't be memorized as the example does. Regarding error reporting, the example does it like this using system__handle_syntax_error().

[arithy]

@joagre , I'm wondering if my answer was what you wanted. If not so, let me know it.
I'll close this issue in a week if no reply. Feel free to reopen it when you need.