This repository has been archived on 2025-10-24. You can view files and clone it, but cannot push or open issues or pull requests.
Files
nub-lang-archive-2/compiler/NubLang/Diagnostics/Diagnostic.cs
nub31 fd27d2709d ...
2025-09-11 21:22:30 +02:00

325 lines
10 KiB
C#

using System.Text;
using NubLang.Code;
using NubLang.Parsing.Syntax;
using NubLang.Tokenization;
namespace NubLang.Diagnostics;
public class Diagnostic
{
public class DiagnosticBuilder
{
private readonly DiagnosticSeverity _severity;
private readonly string _message;
private SourceFileSpan? _fileSpan;
private string? _help;
public DiagnosticBuilder(DiagnosticSeverity severity, string message)
{
_severity = severity;
_message = message;
}
public DiagnosticBuilder At(SyntaxNode? node)
{
if (node != null)
{
var first = node.Tokens.FirstOrDefault();
if (first?.FileSpan != null)
{
var span = SourceSpan.Merge(node.Tokens.Select(x => x.FileSpan?.Span ?? SourceSpan.Zero));
At(new SourceFileSpan(first.FileSpan.SourceFile, span));
}
}
return this;
}
public DiagnosticBuilder At(Token? token)
{
if (token != null)
{
At(token.FileSpan);
}
return this;
}
public DiagnosticBuilder At(SourceFileSpan? fileSpan)
{
if (fileSpan != null)
{
_fileSpan = fileSpan;
}
return this;
}
public DiagnosticBuilder WithHelp(string help)
{
_help = help;
return this;
}
public Diagnostic Build() => new(_severity, _message, _help, _fileSpan);
}
public static DiagnosticBuilder Error(string message) => new(DiagnosticSeverity.Error, message);
public static DiagnosticBuilder Warning(string message) => new(DiagnosticSeverity.Warning, message);
public static DiagnosticBuilder Info(string message) => new(DiagnosticSeverity.Info, message);
public DiagnosticSeverity Severity { get; }
public string Message { get; }
public string? Help { get; }
public SourceFileSpan? FileSpan { get; }
private Diagnostic(DiagnosticSeverity severity, string message, string? help, SourceFileSpan? fileSpan)
{
Severity = severity;
Message = message;
Help = help;
FileSpan = fileSpan;
}
public string FormatANSI()
{
var sb = new StringBuilder();
sb.Append(Severity switch
{
DiagnosticSeverity.Error => ConsoleColors.Colorize("error", ConsoleColors.Bold + ConsoleColors.Red),
DiagnosticSeverity.Warning => ConsoleColors.Colorize("warning", ConsoleColors.Bold + ConsoleColors.Yellow),
DiagnosticSeverity.Info => ConsoleColors.Colorize("info", ConsoleColors.Bold + ConsoleColors.Blue),
_ => ConsoleColors.Colorize("unknown", ConsoleColors.Bold + ConsoleColors.White)
});
if (FileSpan != null)
{
sb.Append(ConsoleColors.Colorize($" at {FileSpan.SourceFile.Path}:{FileSpan.Span}", ConsoleColors.Faint));
}
sb.Append(": ");
sb.Append(ConsoleColors.Colorize(Message, ConsoleColors.BrightWhite));
if (FileSpan != null)
{
sb.AppendLine();
var text = FileSpan.SourceFile.GetText();
var lines = text.Split('\n');
var startLine = FileSpan.Span.Start.Line;
var endLine = FileSpan.Span.End.Line;
const int CONTEXT_LINES = 3;
var contextStartLine = Math.Max(1, startLine - CONTEXT_LINES);
var contextEndLine = Math.Min(lines.Length, endLine + CONTEXT_LINES);
var numberPadding = contextEndLine.ToString().Length;
var codePadding = lines.Skip(contextStartLine - 1).Take(contextEndLine - contextStartLine).Max(x => x.Length);
sb.Append('╭');
sb.Append(new string('─', numberPadding + 2));
sb.Append('┬');
sb.Append(new string('─', codePadding + 2));
sb.Append('╮');
sb.AppendLine();
var tokenizer = new Tokenizer(FileSpan.SourceFile);
var tokens = tokenizer.Tokenize().ToList();
for (var i = contextStartLine; i <= contextEndLine; i++)
{
var line = lines[i - 1];
sb.Append("│ ");
sb.Append(i.ToString().PadRight(numberPadding));
sb.Append(" │ ");
sb.Append(ApplySyntaxHighlighting(line.PadRight(codePadding), i, tokens));
sb.Append(" │");
sb.AppendLine();
if (i >= startLine && i <= endLine)
{
var markerStartColumn = 1;
var markerEndColumn = line.Length + 1;
if (i == startLine)
{
markerStartColumn = FileSpan.Span.Start.Column;
}
if (i == endLine)
{
markerEndColumn = FileSpan.Span.End.Column;
}
var markerLength = markerEndColumn - markerStartColumn;
var marker = new string('^', markerLength);
var markerColor = Severity switch
{
DiagnosticSeverity.Info => ConsoleColors.Blue,
DiagnosticSeverity.Warning => ConsoleColors.Yellow,
DiagnosticSeverity.Error => ConsoleColors.Red,
_ => ConsoleColors.White
};
sb.Append("│ ");
sb.Append(new string(' ', numberPadding));
sb.Append(" │ ");
sb.Append(new string(' ', markerStartColumn - 1));
sb.Append(ConsoleColors.Colorize(marker, markerColor));
sb.Append(new string(' ', codePadding - markerEndColumn + 1));
sb.Append(" │");
sb.AppendLine();
}
}
sb.Append('╰');
sb.Append(new string('─', numberPadding + 2));
sb.Append('┴');
sb.Append(new string('─', codePadding + 2));
sb.Append('╯');
}
if (Help != null)
{
sb.AppendLine();
sb.Append(ConsoleColors.Colorize($"help: {Help}", ConsoleColors.Cyan));
}
return sb.ToString();
}
private static string ApplySyntaxHighlighting(string line, int lineNumber, List<Token> tokens)
{
var sb = new StringBuilder();
var lineTokens = tokens
.Where(t => t.FileSpan.Span.Start.Line == lineNumber)
.OrderBy(t => t.FileSpan.Span.Start.Column)
.ToList();
if (lineTokens.Count == 0)
{
return line;
}
var currentColumn = 1;
foreach (var token in lineTokens)
{
var tokenStart = token.FileSpan.Span.Start.Column;
var tokenEnd = token.FileSpan.Span.End.Column;
if (tokenStart > currentColumn)
{
var beforeToken = line.Substring(currentColumn - 1, tokenStart - currentColumn);
sb.Append(beforeToken);
}
var tokenLength = tokenEnd - tokenStart;
if (tokenStart - 1 + tokenLength <= line.Length)
{
var tokenText = line.Substring(tokenStart - 1, tokenLength);
var coloredToken = ColorizeToken(token, tokenText);
sb.Append(coloredToken);
}
currentColumn = tokenEnd;
}
if (currentColumn <= line.Length)
{
var remaining = line[(currentColumn - 1)..];
sb.Append(remaining);
}
return sb.ToString();
}
private static string ColorizeToken(Token token, string tokenText)
{
switch (token)
{
case IdentifierToken:
{
return ConsoleColors.Colorize(tokenText, ConsoleColors.BrightWhite);
}
case LiteralToken literal:
{
if (literal.Kind == LiteralKind.String)
{
return ConsoleColors.Colorize(tokenText, ConsoleColors.Green);
}
return ConsoleColors.Colorize(tokenText, ConsoleColors.Magenta);
}
case SymbolToken symbolToken:
{
switch (symbolToken.Symbol)
{
case Symbol.Func:
case Symbol.Return:
case Symbol.If:
case Symbol.Else:
case Symbol.While:
case Symbol.Break:
case Symbol.Continue:
case Symbol.Struct:
case Symbol.Let:
case Symbol.Calls:
case Symbol.Interface:
case Symbol.For:
case Symbol.Extern:
{
return ConsoleColors.Colorize(tokenText, ConsoleColors.Bold + ConsoleColors.Blue);
}
case Symbol.Assign:
case Symbol.Bang:
case Symbol.Equal:
case Symbol.NotEqual:
case Symbol.LessThan:
case Symbol.LessThanOrEqual:
case Symbol.GreaterThan:
case Symbol.GreaterThanOrEqual:
case Symbol.Plus:
case Symbol.Minus:
case Symbol.Star:
case Symbol.ForwardSlash:
case Symbol.Caret:
case Symbol.Ampersand:
{
return ConsoleColors.Colorize(tokenText, ConsoleColors.Yellow);
}
case Symbol.Colon:
case Symbol.OpenParen:
case Symbol.CloseParen:
case Symbol.OpenBrace:
case Symbol.CloseBrace:
case Symbol.OpenBracket:
case Symbol.CloseBracket:
case Symbol.Comma:
case Symbol.Period:
case Symbol.Semi:
{
return ConsoleColors.Colorize(tokenText, ConsoleColors.BrightBlack);
}
}
break;
}
}
return tokenText;
}
}
public enum DiagnosticSeverity
{
Info,
Warning,
Error
}