Function peak_source

subprojects/llama.cpp/common/jinja/utils.h:29–42

for displaying source code around error position

// for displaying source code around error position
static std::string peak_source(const std::string & source, size_t pos, size_t max_peak_chars = 40) {
    if (source.empty()) {
        return "(no source available)";
    }
    std::string output;
    size_t start = (pos >= max_peak_chars) ? (pos - max_peak_chars) : 0;
    size_t end = std::min(pos + max_peak_chars, source.length());
    std::string substr = source.substr(start, end - start);
    string_replace_all(substr, "\n", "↵");
    output += "..." + substr + "...\n";
    std::string spaces(pos - start + 3, ' ');
    output += spaces + "^";
    return output;
}

static std::string fmt_error_with_source(const std::string & tag, const std::string & msg, const std::string & source, size_t pos) {
    std::ostringstream oss;