forked from lix-project/lix
Remove error-demo/error-demo.cc
The logging.hh superseeds the demo
This commit is contained in:
Tobias Pflug
parent
952e72c804
commit
e60747b5fb
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#include "logging.hh"
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#include "nixexpr.hh"
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#include "util.hh"
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#include <iostream>
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#include <optional>
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using namespace nix;
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MakeError(DemoError, Error);
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int main()
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{
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verbosity = lvlVomit;
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// In each program where errors occur, this has to be set.
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ErrorInfo::programName = std::optional("error-demo");
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// 'DemoError' appears as error name.
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try {
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throw DemoError("demo error was thrown");
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} catch (Error &e) {
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logger->logEI(e.info());
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}
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// appending to the hint from the previous error
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try {
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auto e = Error("initial error");
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throw DemoError(e.info());
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} catch (Error &e) {
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ErrorInfo ei = e.info();
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// using normaltxt to avoid the default yellow highlighting.
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ei.hint = hintfmt("%s; subsequent error message.",
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normaltxt(e.info().hint ? e.info().hint->str() : ""));
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logger->logEI(ei);
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}
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// SysError; picks up errno
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try {
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auto x = readFile(-1);
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}
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catch (SysError &e) {
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std::cout << "errno was: " << e.errNo << std::endl;
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logError(e.info());
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}
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// current exception
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try {
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throw DemoError("DemoError handled as a %1%", "std::exception");
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}
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catch (...) {
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const std::exception_ptr &eptr = std::current_exception();
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try
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{
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std::rethrow_exception(eptr);
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}
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catch (std::exception& e)
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{
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std::cerr << e.what() << std::endl;
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}
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}
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// For completeness sake, show 'info' through 'vomit' levels.
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// But this is maybe a heavy format for those.
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logger->logEI({ .level = lvlInfo,
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.name = "Info name",
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.description = "Info description",
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});
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logger->logEI({ .level = lvlTalkative,
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.name = "Talkative name",
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.description = "Talkative description",
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});
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logger->logEI({ .level = lvlChatty,
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.name = "Chatty name",
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.description = "Chatty description",
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});
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logger->logEI({ .level = lvlDebug,
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.name = "Debug name",
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.description = "Debug description",
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});
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logger->logEI({ .level = lvlVomit,
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.name = "Vomit name",
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.description = "Vomit description",
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});
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// Error in a program; no hint and no nix code.
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logError({
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.name = "name",
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.description = "error description",
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});
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// Warning with name, description, and hint.
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// The hintfmt function makes all the substituted text yellow.
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logWarning({
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.name = "name",
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.description = "error description",
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.hint = hintfmt("there was a %1%", "warning"),
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});
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// Warning with nix file, line number, column, and the lines of
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// code where a warning occurred.
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SymbolTable testTable;
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auto problem_file = testTable.create("myfile.nix");
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logWarning({
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.name = "warning name",
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.description = "warning description",
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.hint = hintfmt("this hint has %1% templated %2%!!",
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"yellow",
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"values"),
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.nixCode = NixCode {
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.errPos = Pos(problem_file, 40, 13),
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.prevLineOfCode = std::nullopt,
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.errLineOfCode = "this is the problem line of code",
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.nextLineOfCode = std::nullopt
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}});
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// Error with previous and next lines of code.
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logError({
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.name = "error name",
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.description = "error with code lines",
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.hint = hintfmt("this hint has %1% templated %2%!!",
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"yellow",
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"values"),
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.nixCode = NixCode {
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.errPos = Pos(problem_file, 40, 13),
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.prevLineOfCode = "previous line of code",
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.errLineOfCode = "this is the problem line of code",
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.nextLineOfCode = "next line of code",
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}});
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// Error without lines of code.
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logError({
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.name = "error name",
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.description = "error without any code lines.",
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.hint = hintfmt("this hint has %1% templated %2%!!",
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"yellow",
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"values"),
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.nixCode = NixCode {
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.errPos = Pos(problem_file, 40, 13)
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}});
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// Error with only hint and name..
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logError({
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.name = "error name",
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.hint = hintfmt("hint %1%", "only"),
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.nixCode = NixCode {
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.errPos = Pos(problem_file, 40, 13)
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}});
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return 0;
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}
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@ -1,12 +0,0 @@
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programs += error-demo
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error-demo_DIR := $(d)
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error-demo_SOURCES := \
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$(wildcard $(d)/*.cc) \
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error-demo_CXXFLAGS += -I src/libutil -I src/libexpr
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error-demo_LIBS = libutil libexpr
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error-demo_LDFLAGS = -pthread $(SODIUM_LIBS) $(EDITLINE_LIBS) $(BOOST_LDFLAGS) -lboost_context -lboost_thread -lboost_system
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