Formatted output for real

.circleci/config.yml

@@ -1,4 +1,4 @@
-version: 2
+version: 2.1
 
 jobs:
   bionic_gcc7_conda_coverage:
@@ -33,14 +33,6 @@ jobs:
     - run:
         name: Build and test
         command: bash ./tools/circleci_focal_gcc9_conda_docs.sh
-  focal_clang9_conda_tsan:
-    docker:
-    - image: circleci/buildpack-deps:focal
-    steps:
-    - checkout
-    - run:
-        name: Build and test
-        command: bash ./tools/circleci_focal_clang9_conda_tsan.sh
   focal_clang9_debuggmp_unstable:
     docker:
     - image: circleci/buildpack-deps:focal
@@ -57,30 +49,6 @@ jobs:
     - run:
         name: Build and test
         command: bash ./tools/circleci_focal_clang9_debuggmp.sh
-  bionic_gcc7_conda_asan:
-    docker:
-    - image: circleci/buildpack-deps:bionic
-    steps:
-    - checkout
-    - run:
-        name: Build and test
-        command: bash ./tools/circleci_bionic_gcc7_conda_asan.sh
-  bionic_gcc7_conda_ubsan:
-    docker:
-    - image: circleci/buildpack-deps:bionic
-    steps:
-    - checkout
-    - run:
-        name: Build and test
-        command: bash ./tools/circleci_bionic_gcc7_conda_ubsan.sh
-  bionic_clang6:
-    docker:
-    - image: circleci/buildpack-deps:bionic
-    steps:
-    - checkout
-    - run:
-        name: Build and test
-        command: bash ./tools/circleci_bionic_clang6.sh
   focal_clang9_msan_00:
     docker:
     - image: circleci/buildpack-deps:focal
@@ -103,20 +71,26 @@ jobs:
         environment:
           TEST_NSPLIT: 2
           SPLIT_TEST_NUM: 1
+  ubuntu_arm64:
+    machine:
+      image: ubuntu-2004:202101-01
+    resource_class: arm.medium
+    steps:
+    - checkout
+    - run:
+        name: Build and test
+        command: bash ./tools/circleci_ubuntu_arm64.sh
 
 workflows:
-  version: 2
+  version: 2.1
   all_builds:
     jobs:
     - focal_clang9_msan_00
     - focal_clang9_msan_01
-    - bionic_clang6
     - bionic_gcc7_conda_coverage
     - bionic_gcc7_conda_release
     - focal_gcc9_conda_coverage
-    - focal_clang9_conda_tsan
     - focal_clang9_debuggmp_unstable
     - focal_clang9_debuggmp
-    - bionic_gcc7_conda_asan
-    - bionic_gcc7_conda_ubsan
     - focal_gcc9_conda_docs
+    - ubuntu_arm64

.clang-tidy

@@ -1,5 +1,5 @@
 ---
-Checks:          'clang-diagnostic-*,clang-analyzer-*,*,-hicpp-uppercase-literal-suffix,-readability-uppercase-literal-suffix,-modernize-use-trailing-return-type,-readability-named-parameter,-hicpp-named-parameter,-cppcoreguidelines-pro-bounds-array-to-pointer-decay,-hicpp-no-array-decay,-llvm-header-guard,-cppcoreguidelines-macro-usage,-google-runtime-references,-readability-isolate-declaration,-fuchsia-default-arguments-calls,-fuchsia-overloaded-operator,-fuchsia-default-arguments-declarations,-readability-else-after-return,-google-runtime-int,-hicpp-signed-bitwise,-cert-dcl21-cpp,-cppcoreguidelines-avoid-magic-numbers,-readability-magic-numbers,-cppcoreguidelines-pro-bounds-pointer-arithmetic,-cppcoreguidelines-pro-type-reinterpret-cast,-cppcoreguidelines-avoid-c-arrays,-hicpp-avoid-c-arrays,-modernize-avoid-c-arrays,-modernize-use-transparent-functors,-cert-dcl16-c,-cppcoreguidelines-pro-type-union-access,-bugprone-branch-clone,-fuchsia-statically-constructed-objects,-cppcoreguidelines-pro-bounds-constant-array-index,-readability-static-accessed-through-instance,-cppcoreguidelines-pro-type-vararg,-hicpp-vararg,-llvmlibc-restrict-system-libc-headers,-llvmlibc-callee-namespace,-llvmlibc-implementation-in-namespace,-llvm-else-after-return'
+Checks:          'clang-diagnostic-*,clang-analyzer-*,*,-hicpp-uppercase-literal-suffix,-readability-uppercase-literal-suffix,-modernize-use-trailing-return-type,-readability-named-parameter,-hicpp-named-parameter,-cppcoreguidelines-pro-bounds-array-to-pointer-decay,-hicpp-no-array-decay,-llvm-header-guard,-cppcoreguidelines-macro-usage,-google-runtime-references,-readability-isolate-declaration,-fuchsia-default-arguments-calls,-fuchsia-overloaded-operator,-fuchsia-default-arguments-declarations,-readability-else-after-return,-google-runtime-int,-hicpp-signed-bitwise,-cert-dcl21-cpp,-cppcoreguidelines-avoid-magic-numbers,-readability-magic-numbers,-cppcoreguidelines-pro-bounds-pointer-arithmetic,-cppcoreguidelines-pro-type-reinterpret-cast,-cppcoreguidelines-avoid-c-arrays,-hicpp-avoid-c-arrays,-modernize-avoid-c-arrays,-modernize-use-transparent-functors,-cert-dcl16-c,-cppcoreguidelines-pro-type-union-access,-bugprone-branch-clone,-fuchsia-statically-constructed-objects,-cppcoreguidelines-pro-bounds-constant-array-index,-readability-static-accessed-through-instance,-cppcoreguidelines-pro-type-vararg,-hicpp-vararg,-llvmlibc-restrict-system-libc-headers,-llvmlibc-callee-namespace,-llvmlibc-implementation-in-namespace,-llvm-else-after-return,-altera-struct-pack-align,-readability-function-cognitive-complexity'
 WarningsAsErrors: '*'
 AnalyzeTemporaryDtors: false
 FormatStyle:     none

.github/workflows/gh_actions_ci.yml

@@ -7,6 +7,36 @@ on:
     branches:
       - master
 jobs:
+  osx_10_15:
+    runs-on: macos-10.15
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build
+        run: bash tools/gha_osx.sh
+  bionic_clang6:
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build
+        run: bash tools/gha_bionic_clang6.sh
+  bionic_gcc7_conda_asan:
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build
+        run: bash tools/gha_bionic_gcc7_conda_asan.sh
+  bionic_gcc7_conda_ubsan:
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build
+        run: bash tools/gha_bionic_gcc7_conda_ubsan.sh
+  focal_clang9_conda_tsan:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build
+        run: bash tools/gha_focal_clang9_conda_tsan.sh
   binder_cache:
     runs-on: ubuntu-latest
     if: github.ref == 'refs/heads/master'

README.md

@@ -1,6 +1,6 @@
 # mp++
 [![Build Status](https://img.shields.io/circleci/project/github/bluescarni/mppp/master.svg?style=for-the-badge)](https://circleci.com/gh/bluescarni/mppp)
-[![Build Status](https://img.shields.io/travis/bluescarni/mppp/master.svg?logo=travis&style=for-the-badge)](https://travis-ci.org/bluescarni/mppp)
+[![Build Status](https://img.shields.io/github/workflow/status/bluescarni/mppp/GitHub%20CI?style=for-the-badge)](https://github.com/bluescarni/mppp/actions?query=workflow%3A%22GitHub+CI%22)
 [![Build Status](https://img.shields.io/appveyor/ci/bluescarni/mppp/master.svg?logo=appveyor&style=for-the-badge)](https://ci.appveyor.com/project/bluescarni/mppp)
 ![language](https://img.shields.io/badge/language-C%2B%2B11-red.svg?style=for-the-badge)
 [![Code Coverage](https://img.shields.io/codecov/c/github/bluescarni/mppp.svg?style=for-the-badge)](https://codecov.io/github/bluescarni/mppp?branch=master)

doc/changelog.rst

@@ -7,6 +7,9 @@ Changelog
 New
 ~~~
 
+- :cpp:class:`~mppp::real` now respects the format
+  flags in output streams
+  (`#272 <https://github.com/bluescarni/mppp/pull/272>`__).
 - Add polylogarithms for :cpp:class:`~mppp::real`
   (`#271 <https://github.com/bluescarni/mppp/pull/271>`__).
 - Add the Lambert W functions :math:`W_0` and :math:`W_{-1}`

doc/real.rst

@@ -3059,21 +3059,16 @@ Input/Output
 
    Output stream operator.
 
-   This operator will insert into the stream *os* a string representation of *r*
-   in base 10 (as returned by :cpp:func:`mppp::real::to_string()`).
-
-   .. warning::
-
-      In future versions of mp++, the behaviour of this operator will change to support the output stream's formatting
-      flags. For the time being, users are encouraged to use the ``mpfr_get_str()`` function from the MPFR
-      library if precise and forward-compatible control on the printing format is needed.
+   This function will direct to the output stream *os* the input :cpp:class:`~mppp::real` *r*.
 
    :param os: the target stream.
    :param r: the input argument.
 
    :return: a reference to *os*.
 
-   :exception unspecified: any exception thrown by :cpp:func:`mppp::real::to_string()`.
+   :exception std\:\:overflow_error: in case of (unlikely) overflow errors.
+   :exception std\:\:invalid_argument: if the MPFR printing primitive ``mpfr_asprintf()`` returns an error code.
+   :exception unspecified: any exception raised by the public interface of ``std::ostream`` or by memory allocation errors.
 
 .. _real_s11n:
 

src/integer.cpp

@@ -272,9 +272,6 @@ std::ostream &integer_stream_operator_impl(std::ostream &os, const mpz_struct_t
     // Start by figuring out the base.
     const auto base = stream_flags_to_base(flags);
 
-    // Determine the fill type.
-    const auto fill = stream_flags_to_fill(flags);
-
     // Should we prefix the base? Do it only if:
     // - the number is nonzero,
     // - the showbase flag is set,
@@ -353,21 +350,26 @@ std::ostream &integer_stream_operator_impl(std::ostream &os, const mpz_struct_t
     // only if the stream width is larger
     // than the total size of the number.
     if (width >= 0 && make_unsigned(width) > final_size) {
+        // Determine the fill type.
+        const auto fill = stream_flags_to_fill(flags);
         // Compute how much fill we need.
         const auto fill_size = safe_cast<decltype(tmp.size())>(make_unsigned(width) - final_size);
         // Get the fill character.
         const auto fill_char = os.fill();
-        // NOLINTNEXTLINE(hicpp-multiway-paths-covered)
+
         switch (fill) {
             case 1:
                 // Left fill: fill characters at the end.
+                // NOTE: minus 1 because of the terminator.
                 tmp.insert(tmp.end() - 1, fill_size, fill_char);
                 break;
             case 2:
                 // Right fill: fill characters at the beginning.
                 tmp.insert(tmp.begin(), fill_size, fill_char);
                 break;
-            case 3: {
+            default: {
+                assert(fill == 3);
+
                 // Internal fill: the fill characters are always after the sign (if present)
                 // and the base prefix (if present).
                 auto delta = static_cast<int>(tmp[0] == '+' || tmp[0] == '-');
@@ -381,6 +383,7 @@ std::ostream &integer_stream_operator_impl(std::ostream &os, const mpz_struct_t
     }
 
     // Write out the unformatted data.
+    // NOTE: minus 1 because of the terminator.
     os.write(tmp.data(), safe_cast<std::streamsize>(tmp.size() - 1u));
 
     // Reset the stream width to zero, like the operator<<() does for builtin types.

src/rational.cpp

@@ -73,9 +73,6 @@ std::ostream &rational_stream_operator_impl(std::ostream &os, const mpz_struct_t
     // Start by figuring out the base.
     const auto base = stream_flags_to_base(flags);
 
-    // Determine the fill type.
-    const auto fill = stream_flags_to_fill(flags);
-
     // Should we prefix the base? Do it only if:
     // - the number is nonzero,
     // - the showbase flag is set,
@@ -187,11 +184,14 @@ std::ostream &rational_stream_operator_impl(std::ostream &os, const mpz_struct_t
     // only if the stream width is larger
     // than the total size of the number.
     if (width >= 0 && make_unsigned(width) > final_size) {
+        // Determine the fill type.
+        const auto fill = stream_flags_to_fill(flags);
+
         // Compute how much fill we need.
         const auto fill_size = safe_cast<decltype(tmp_num.size())>(make_unsigned(width) - final_size);
         // Get the fill character.
         const auto fill_char = os.fill();
-        // NOLINTNEXTLINE(hicpp-multiway-paths-covered)
+
         switch (fill) {
             case 1:
                 // Left fill: fill characters at the end.
@@ -208,7 +208,9 @@ std::ostream &rational_stream_operator_impl(std::ostream &os, const mpz_struct_t
                 // before the numerator starts).
                 tmp_num.insert(tmp_num.begin(), fill_size, fill_char);
                 break;
-            case 3: {
+            default: {
+                assert(fill == 3);
+
                 // Internal fill: the fill characters are always after the sign (if present).
                 // NOTE: contrary to integer, the internal fill does not take into account
                 // the base prefix, and it happens only if a sign is present.