153 lines
3.2 KiB
C++
153 lines
3.2 KiB
C++
#include "error.hh"
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#include <iostream>
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namespace nix {
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using std::cout;
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using std::endl;
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// return basic_format?
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string showErrLine(ErrLine &errLine)
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{
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if (errLine.columnRange.has_value())
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{
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return (format("(%1%:%2%)") % errLine.lineNumber % errLine.columnRange->start).str();
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}
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else
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{
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return (format("(%1%)") % errLine.lineNumber).str();
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};
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}
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void print_code_lines(string &prefix, NixCode &nix_code)
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{
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if (nix_code.errLine.has_value())
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{
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// previous line of code.
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if (nix_code.errLine->prevLineOfCode.has_value()) {
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cout << format("%1% %|2$5d|| %3%")
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% prefix
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% (nix_code.errLine->lineNumber - 1)
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% *nix_code.errLine->prevLineOfCode
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<< endl;
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}
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// line of code containing the error.%2$+5d%
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cout << format("%1% %|2$5d|| %3%")
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% prefix
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% (nix_code.errLine->lineNumber)
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% nix_code.errLine->errLineOfCode
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<< endl;
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// error arrows for the column range.
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if (nix_code.errLine->columnRange.has_value())
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{
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int start = nix_code.errLine->columnRange->start;
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std::string spaces;
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for (int i = 0; i < start; ++i)
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{
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spaces.append(" ");
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}
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int len = nix_code.errLine->columnRange->len;
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std::string arrows;
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for (int i = 0; i < len; ++i)
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{
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arrows.append("^");
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}
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cout << format("%1% |%2%%3%") % prefix % spaces % arrows;
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}
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// next line of code.
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if (nix_code.errLine->nextLineOfCode.has_value()) {
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cout << format("%1% %|2$5d|| %3%")
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% prefix
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% (nix_code.errLine->lineNumber + 1)
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% *nix_code.errLine->nextLineOfCode
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<< endl;
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}
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}
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}
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void print_error(ErrorInfo &einfo)
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{
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int errwidth = 80;
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string prefix = " ";
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string level_string;
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switch (einfo.level)
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{
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case ErrLevel::elError:
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{
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level_string = "error:"; // TODO make red.
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break;
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}
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case ErrLevel::elWarning:
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{
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level_string = "warning:"; // TODO make yellow.
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break;
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}
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default:
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{
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level_string = "wat:";
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break;
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}}
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int ndl = level_string.length() + 3 + einfo.name.length() + einfo.program.length();
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int dashwidth = errwidth - 3 ? 3 : 80 - ndl;
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string dashes;
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for (int i = 0; i < dashwidth; ++i)
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dashes.append("-");
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// divider.
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cout << format("%1%%2% %3% %4% %5% %6%")
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% prefix
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% level_string
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% "---"
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% einfo.name
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% dashes
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% einfo.program
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<< endl;
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// filename.
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if (einfo.nixCode.has_value())
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{
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if (einfo.nixCode->nixFile.has_value())
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{
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string eline = einfo.nixCode->errLine.has_value()
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? string(" ") + showErrLine(*einfo.nixCode->errLine)
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: "";
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cout << format("%1%in file: %2%%3%") % prefix % *einfo.nixCode->nixFile % eline << endl;
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cout << prefix << endl;
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}
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else
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{
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cout << format("%1%from command line argument") % prefix << endl;
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cout << prefix << endl;
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}
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}
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// description
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cout << prefix << einfo.description << endl;
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cout << prefix << endl;
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// lines of code.
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if (einfo.nixCode.has_value())
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print_code_lines(prefix, *einfo.nixCode);
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// hint
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cout << prefix << einfo.hint << endl;
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cout << prefix << endl;
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}
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}
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