60 lines
1.9 KiB
C++
60 lines
1.9 KiB
C++
/** @file TokenizerError.cpp
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*
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* @author Roland Conybeare, Jun 2025
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**/
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#include "TokenizerError.hpp"
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namespace xo {
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namespace scm {
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void
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TokenizerError::print(std::ostream & os) const
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{
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os << "<tokenizer-error"
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<< xtag("src-function", src_function_)
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<< xtag("message", error_description_)
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<< xtag("input", input_state_.current_line())
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<< xtag("whitespace", input_state_.whitespace())
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<< xtag("error-pos", error_pos_)
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<< ">";
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}
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void
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TokenizerError::report(std::ostream & os) const
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{
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using namespace std;
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if (!error_description_.empty()) {
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const char * prefix = "input: ";
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/* input_state.tk_start: position of first character in token
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* input_state.current_pos: position of first character following preceding token.
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* error_pos: position (relative to start) at which failure detected
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*/
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const size_t tk_start = input_state_.tk_start();
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const size_t tk_indent = (strlen(prefix) + tk_start);
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const size_t error_pos = 1 + tk_start + error_pos_;
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os << "token col: " << tk_start << ", error col: " << error_pos << "\n";
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os << prefix;
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for (const char *p = input_state_.current_line().lo(),
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*e = input_state_.current_line().hi(); p < e; ++p)
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{
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os << *p;
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}
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//os << endl;
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os << std::setw(tk_indent) << " ";
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for (size_t i = 0; i < error_pos_; ++i) {
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os << '_';
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}
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os << '^' << endl;
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os << error_description_ << endl;
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}
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}
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} /*namespace scm*/
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} /*namespace xo*/
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/* end TokenizerError.cpp */
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