Merge pull request #174 from OpenMS/jpfeuffer-patch-1

Try to add real BooleanConverter

Author: jpfeuffer

autowrap/CodeGenerator.py

@@ -2100,8 +2100,9 @@ def create_default_cimports(self):
                    |#Generated with autowrap %s and Cython (Parser) %s
                    |#cython: c_string_encoding=ascii
                    |#cython: embedsignature=False
-                   |from  enum             import Enum as _PyEnum
-                   |from cpython cimport Py_buffer
+                   |from  enum            import Enum as _PyEnum
+                   |from  cpython         cimport Py_buffer
+                   |from  cpython         cimport bool as pybool_t
                    |from  libcpp.string   cimport string as libcpp_string
                    |from  libcpp.string   cimport string as libcpp_utf8_string
                    |from  libcpp.string   cimport string as libcpp_utf8_output_string

autowrap/ConversionProvider.py

@@ -220,7 +220,7 @@ class IntegerConverter(TypeConverterBase):
     def get_base_types(self) -> List[str]:
         return [
             "int",
-            "bool",
+            "bint",  # C boolean type
             "long",
             "int32_t",
             "ptrdiff_t",
@@ -255,6 +255,41 @@ def output_conversion(
         return "%s = <%s>%s" % (output_py_var, cpp_type, input_cpp_var)
 
 
+class BooleanConverter(TypeConverterBase):
+    """
+    Wraps a C++ bool. Bools are automatically imported in the beginning of a file with
+    'from libcpp import bool'.
+    """
+
+    def get_base_types(self) -> List[str]:
+        return [
+            "bool",
+        ]
+
+    def matches(self, cpp_type: CppType) -> bool:
+        return not cpp_type.is_ptr
+
+    def matching_python_type(self, cpp_type: CppType) -> str:
+        return "bool"
+
+    def matching_python_type_full(self, cpp_type: CppType) -> str:
+        return "bool"
+
+    def type_check_expression(self, cpp_type: CppType, argument_var: str) -> str:
+        return "isinstance(%s, pybool_t)" % (argument_var,)
+
+    def input_conversion(self, cpp_type, argument_var, arg_num) -> Tuple[str, str, str]:
+        code = ""
+        call_as = "(<%s>%s)" % (cpp_type, argument_var)
+        cleanup = ""
+        return code, call_as, cleanup
+
+    def output_conversion(
+        self, cpp_type: CppType, input_cpp_var: str, output_py_var: str
+    ) -> Optional[str]:
+        return "%s = <%s>%s" % (output_py_var, cpp_type, input_cpp_var)
+
+
 class UnsignedIntegerConverter(TypeConverterBase):
     """
     wraps unsigned long and int. "long" base_type is converted to "int" by the
@@ -2234,6 +2269,7 @@ def setup_converter_registry(classes_to_wrap, enums_to_wrap, instance_map):
     )
 
     converters.register(IntegerConverter())
+    converters.register(BooleanConverter())
     converters.register(UnsignedIntegerConverter())
     converters.register(FloatConverter())
     converters.register(DoubleConverter())

tests/test_code_generator_minimal.py

@@ -105,6 +105,10 @@ def output_conversion(self, cpp_type, input_cpp_var, output_py_var):
     minimal.m_accessible = 10
     assert minimal.m_accessible == 10
 
+    minimal.m_bool = True
+    assert isinstance(minimal.m_bool, bool)
+    assert minimal.m_bool == True
+
     try:
         minimal.m_const = 10
         assert False

tests/test_files/minimal.cpp

@@ -1,16 +1,16 @@
 #include <iostream>
 #include "minimal.hpp"
 
-Minimal::Minimal() : _i(0), _mi(), m_accessible(0)
+Minimal::Minimal() : _i(0), _mi(), m_accessible(0), m_bool(false)
 {
 }
 
-Minimal::Minimal(std::vector<int> const & ii): _mi(), m_accessible(0)
+Minimal::Minimal(std::vector<int> const & ii): _mi(), m_accessible(0), m_bool(false)
 {
     _i = ii.size();
 }
 
-Minimal::Minimal(int i) : _i(i), _mi(), m_accessible(0)
+Minimal::Minimal(int i) : _i(i), _mi(), m_accessible(0), m_bool(false)
 {
 }
 
@@ -19,6 +19,7 @@ Minimal::Minimal(const Minimal &m)
     _i = m._i;
     _mi = m._mi;
     m_accessible = m.m_accessible;
+    m_bool = m.m_bool;
 }
 
 

tests/test_files/minimal.hpp

@@ -19,6 +19,7 @@ class Minimal {
         static const int m_const = -1;
         static const int m_constdef = -1;
         int m_accessible;
+        bool m_bool;
 
         Minimal();
         Minimal(Int);

tests/test_files/minimal.pxd

@@ -1,6 +1,7 @@
 # cython: language_level=2
 from libcpp.string cimport string as libcpp_string
 from libcpp.vector cimport vector as libcpp_vector
+from libcpp cimport bool
 from libc.string cimport const_char
 
 from minimal_td cimport *
@@ -22,6 +23,7 @@ cdef extern from "minimal.hpp":
         Minimal(Minimal &)
 
         int m_accessible
+        bool m_bool
         int m_const # wrap-constant
         const int m_constdef