diff --git a/src/api/exception.cpp b/src/api/exception.cpp index e75aa464b..7d0f11f0b 100644 --- a/src/api/exception.cpp +++ b/src/api/exception.cpp @@ -6,9 +6,12 @@ Author: Leonardo de Moura */ #include "kernel/kernel_exception.h" #include "library/unifier.h" +#include "library/print.h" #include "library/tactic/tactic.h" +#include "library/error_handling/error_handling.h" #include "api/exception.h" #include "api/string.h" +using namespace lean; // NOLINT namespace lean { memout_exception * get_memout_exception() { @@ -39,6 +42,24 @@ char const * lean_exception_get_message(lean_exception e) { } } +char const * lean_exception_get_detailed_message(lean_exception e) { + if (!e) + return 0; + try { + formatter_factory fmtf = mk_print_formatter_factory(); + std::shared_ptr out(new string_output_channel()); + io_state ios(fmtf); + ios.set_regular_channel(out); + ios.set_diagnostic_channel(out); + environment env; + io_state_stream ioss(env, ios); + display_error(ioss, nullptr, *lean::to_exception(e)); + return mk_string(static_cast(out.get())->str()); + } catch (...) { + return 0; + } +} + lean_exception_kind lean_exception_get_kind(lean_exception e) { lean::throwable * ex = lean::to_exception(e); if (!ex) diff --git a/src/api/lean_exception.h b/src/api/lean_exception.h index c0ef01d0e..e00b08816 100644 --- a/src/api/lean_exception.h +++ b/src/api/lean_exception.h @@ -28,6 +28,13 @@ void lean_exception_del(lean_exception e); */ char const * lean_exception_get_message(lean_exception e); +/** \brief Return basic string/message describing the exception. + \remark The string must be deallocated using #lean_string_del. + This function is similar to #lean_exception_get_message, but produces + more information if available. +*/ +char const * lean_exception_get_detailed_message(lean_exception e); + typedef enum { LEAN_NULL_EXCEPTION, // null (aka there is no exception) LEAN_SYSTEM_EXCEPTION, // exception generated by the C++ runtime diff --git a/src/tests/shared/env.c b/src/tests/shared/env.c index 7728f3788..79918a551 100644 --- a/src/tests/shared/env.c +++ b/src/tests/shared/env.c @@ -524,11 +524,17 @@ void test_parser_error() { &new_env, &new_ios, &ex)); { lean_exception ex2 = 0; - char const * s; + char const * s1 = lean_exception_get_message(ex); + char const * s2 = lean_exception_get_detailed_message(ex); + char const * s3; printf("\nexception kind: %d\n", lean_exception_get_kind(ex)); - check(lean_exception_to_pp_string(env, ios, ex, &s, &ex2)); - printf("exception\n%s", s); - lean_string_del(s); + printf("exception message: %s\n", s1); + printf("exception detailed message: %s\n", s2); + check(lean_exception_to_pp_string(env, ios, ex, &s3, &ex2)); + printf("exception: %s\n", s3); + lean_string_del(s1); + lean_string_del(s2); + lean_string_del(s3); } lean_exception_del(ex); lean_env_del(env);