Add support for list.append method (pyccel#1982)

Add support for list.append method

---------

Co-authored-by: Emily Bourne <[email protected]>

Author: jalalium

CHANGELOG.md

@@ -31,6 +31,7 @@ All notable changes to this project will be documented in this file.
 -   #1874 : Add C and Fortran support for the `len()` function for the `list` container.
 -   #1875 : Add C and Fortran support for the `len()` function for the `set` container.
 -   #1908 : Add C and Fortran support for the `len()` function for the `dict` container.
+-   #1689 : Add C and Fortran support for list method `append()`.
 -   #1876 : Add C support for indexing lists.
 -   #1690 : Add C support for list method `pop()`.
 -   #1877 : Add C Support for set method `pop()`.

docs/builtin-functions.md

@@ -78,7 +78,7 @@ Python contains a limited number of builtin functions defined [here](https://doc
 
 | Method | Supported |
 |----------|-----------|
-| `append` | Python-only |
+| **`append`** | **Yes** |
 | `clear` | Python-only |
 | `copy` | Python-only |
 | `count` | No |

pyccel/codegen/printing/ccode.py

@@ -2580,6 +2580,14 @@ def _print_ClassDef(self, expr):
         return methods + interfaces
 
     #================== List methods ==================
+    def _print_ListAppend(self, expr):
+        target = expr.list_obj
+        class_type = target.class_type
+        c_type = self.get_c_type(class_type)
+        arg = self._print(expr.args[0])
+        list_obj = self._print(ObjectAddress(expr.list_obj))
+        return f'{c_type}_push({list_obj}, {arg});\n'
+
     def _print_ListPop(self, expr):
         class_type = expr.list_obj.class_type
         c_type = self.get_c_type(class_type)

pyccel/codegen/printing/fcode.py

@@ -1147,6 +1147,14 @@ def _print_PythonImag(self, expr):
         value = self._print(expr.internal_var)
         return f'aimag({value})'
 
+    #========================== List Methods ===============================#
+
+    def _print_ListAppend(self, expr):
+        target = expr.list_obj
+        arg = self._print(expr.args[0])
+        return f'call {target} % push_back({arg})\n'
+
+
 
 
     #========================== Numpy Elements ===============================#