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using Microsoft.Boogie;
using System;
using System.Collections.Generic;
using System.Diagnostics.Contracts;
using System.Linq;
using System.Text;
namespace Microsoft.Dafny {
public enum ErrorLevel {
Info, Warning, Error
}
public enum MessageSource {
Parser, Resolver, Translator, Rewriter, Other,
RefinementTransformer,
Cloner
}
public struct ErrorMessage {
public IToken token;
public string message;
public MessageSource source;
}
public abstract class ErrorReporter {
public bool ErrorsOnly { get; set; }
public Dictionary<ErrorLevel, List<ErrorMessage>> AllMessages { get; private set; }
protected ErrorReporter() {
ErrorsOnly = false;
AllMessages = new Dictionary<ErrorLevel, List<ErrorMessage>>();
AllMessages[ErrorLevel.Error] = new List<ErrorMessage>();
AllMessages[ErrorLevel.Warning] = new List<ErrorMessage>();
AllMessages[ErrorLevel.Info] = new List<ErrorMessage>();
}
// This is the only thing that needs to be overriden
public virtual bool Message(MessageSource source, ErrorLevel level, IToken tok, string msg) {
bool discard = (ErrorsOnly && level != ErrorLevel.Error) || // Discard non-errors if ErrorsOnly is set
(tok is TokenWrapper && !(tok is NestedToken)); // Discard wrapped tokens, except for nested ones
if (!discard) {
AllMessages[level].Add(new ErrorMessage { token = tok, message = msg });
}
return !discard;
}
public int Count(ErrorLevel level) {
return AllMessages[level].Count;
}
public void Error(MessageSource source, IToken tok, string msg) {
Contract.Requires(tok != null);
Contract.Requires(msg != null);
Message(source, ErrorLevel.Error, tok, msg);
}
// This method required by the Parser
internal void Error(MessageSource source, string filename, int line, int col, string msg) {
var tok = new Token(line, col);
tok.filename = filename;
Error(source, tok, msg);
}
public void Error(MessageSource source, IToken tok, string msg, params object[] args) {
Contract.Requires(tok != null);
Contract.Requires(msg != null);
Error(source, tok, String.Format(msg, args));
}
public void Error(MessageSource source, Declaration d, string msg, params object[] args) {
Contract.Requires(d != null);
Contract.Requires(msg != null);
Error(source, d.tok, msg, args);
}
public void Error(MessageSource source, Statement s, string msg, params object[] args) {
Contract.Requires(s != null);
Contract.Requires(msg != null);
Error(source, s.Tok, msg, args);
}
public void Error(MessageSource source, NonglobalVariable v, string msg, params object[] args) {
Contract.Requires(v != null);
Contract.Requires(msg != null);
Error(source, v.tok, msg, args);
}
public void Error(MessageSource source, Expression e, string msg, params object[] args) {
Contract.Requires(e != null);
Contract.Requires(msg != null);
Error(source, e.tok, msg, args);
}
public void Warning(MessageSource source, IToken tok, string msg) {
Contract.Requires(tok != null);
Contract.Requires(msg != null);
Message(source, ErrorLevel.Warning, tok, msg);
}
public void Warning(MessageSource source, IToken tok, string msg, params object[] args) {
Contract.Requires(tok != null);
Contract.Requires(msg != null);
Warning(source, tok, String.Format(msg, args));
}
public void Info(MessageSource source, IToken tok, string msg) {
Contract.Requires(tok != null);
Contract.Requires(msg != null);
Message(source, ErrorLevel.Info, tok, msg);
}
public void Info(MessageSource source, IToken tok, string msg, params object[] args) {
Contract.Requires(tok != null);
Contract.Requires(msg != null);
Info(source, tok, String.Format(msg, args));
}
public static string ErrorToString(ErrorLevel header, IToken tok, string msg) {
return ErrorToString_Internal(": " + header.ToString(), tok.filename, tok.line, tok.col, ": " + msg);
}
public static string ErrorToString(ErrorLevel header, string filename, int oneBasedLine, int oneBasedColumn, string msg) {
return ErrorToString_Internal(": " + header.ToString(), filename, oneBasedLine, oneBasedColumn, ": " + msg);
}
public static string ErrorToString_Internal(string header, string filename, int oneBasedLine, int oneBasedColumn, string msg) {
return String.Format("{0}({1},{2}){3}{4}", filename, oneBasedLine, oneBasedColumn - 1, header, msg ?? "");
}
}
public class ConsoleErrorReporter : ErrorReporter {
private ConsoleColor ColorForLevel(ErrorLevel level) {
switch (level) {
case ErrorLevel.Error:
return ConsoleColor.Red;
case ErrorLevel.Warning:
return ConsoleColor.Yellow;
case ErrorLevel.Info:
return ConsoleColor.Green;
default:
throw new cce.UnreachableException();
}
}
public override bool Message(MessageSource source, ErrorLevel level, IToken tok, string msg) {
if (base.Message(source, level, tok, msg) && ((DafnyOptions.O != null && DafnyOptions.O.PrintTooltips) || level != ErrorLevel.Info)) {
// Extra indent added to make it easier to distinguish multiline error messages for clients that rely on the CLI
msg = msg.Replace(Environment.NewLine, Environment.NewLine + " ");
ConsoleColor previousColor = Console.ForegroundColor;
Console.ForegroundColor = ColorForLevel(level);
Console.WriteLine(ErrorToString(level, tok, msg));
Console.ForegroundColor = previousColor;
return true;
} else {
return false;
}
}
}
}
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