retain compatibility with code that assumes `importall Base.Operators…

…`, but

give warnings

base/sparse/cholmod.jl

@@ -3,7 +3,7 @@
 module CHOLMOD
 
 import Base: (*), convert, copy, eltype, getindex, show, showarray, size,
-             linearindexing, LinearFast, LinearSlow
+             linearindexing, LinearFast, LinearSlow, ctranspose
 
 import Base.LinAlg: (\), A_mul_Bc, A_mul_Bt, Ac_ldiv_B, Ac_mul_B, At_ldiv_B, At_mul_B,
                  cholfact, det, diag, ishermitian, isposdef,

src/dump.c

@@ -540,6 +540,7 @@ static void jl_serialize_module(ios_t *s, jl_module_t *m)
     }
     jl_serialize_value(s, m->constant_table);
     write_uint8(s, m->istopmod);
+    write_uint8(s, m->std_imports);
     write_uint64(s, m->uuid);
 }
 
@@ -1336,6 +1337,7 @@ static jl_value_t *jl_deserialize_value_(ios_t *s, jl_value_t *vtag, jl_value_t
         m->constant_table = (jl_array_t*)jl_deserialize_value(s, (jl_value_t**)&m->constant_table);
         if (m->constant_table != NULL) jl_gc_wb(m, m->constant_table);
         m->istopmod = read_uint8(s);
+        m->std_imports = read_uint8(s);
         m->uuid = read_uint64(s);
         return (jl_value_t*)m;
     }

src/julia.h

@@ -312,6 +312,7 @@ typedef struct _jl_module_t {
     jl_array_t *constant_table;
     jl_function_t *call_func;  // cached lookup of `call` within this module
     uint8_t istopmod;
+    uint8_t std_imports;  // only for temporarily deprecating `importall Base.Operators`
     uint64_t uuid;
 } jl_module_t;
 

src/module.c

@@ -28,6 +28,7 @@ jl_module_t *jl_new_module(jl_sym_t *name)
     m->constant_table = NULL;
     m->call_func = NULL;
     m->istopmod = 0;
+    m->std_imports = 0;
     m->uuid = uv_now(uv_default_loop());
     htable_new(&m->bindings, 0);
     arraylist_new(&m->usings, 0);
@@ -120,6 +121,16 @@ DLLEXPORT jl_module_t *jl_get_module_of_binding(jl_module_t *m, jl_sym_t *var)
 // and overwriting.
 DLLEXPORT jl_binding_t *jl_get_binding_for_method_def(jl_module_t *m, jl_sym_t *var)
 {
+    if (jl_base_module && m->std_imports && !jl_binding_resolved_p(m,var)) {
+        jl_module_t *opmod = (jl_module_t*)jl_get_global(jl_base_module, jl_symbol("Operators"));
+        if (opmod != NULL && jl_defines_or_exports_p(opmod, var)) {
+            jl_printf(JL_STDERR,
+                      "WARNING: module %s should explicitly import %s from %s\n",
+                      m->name->name, var->name, jl_base_module->name->name);
+            jl_module_import(m, opmod, var);
+        }
+    }
+
     jl_binding_t **bp = (jl_binding_t**)ptrhash_bp(&m->bindings, var);
     jl_binding_t *b = *bp;
 
@@ -133,6 +144,15 @@ DLLEXPORT jl_binding_t *jl_get_binding_for_method_def(jl_module_t *m, jl_sym_t *
                     jl_errorf("error in method definition: %s.%s cannot be extended", b->owner->name->name, var->name);
                 }
                 else {
+                    if (jl_base_module && b->owner == jl_base_module) {
+                        jl_module_t *opmod = (jl_module_t*)jl_get_global(jl_base_module, jl_symbol("Operators"));
+                        if (opmod != NULL && jl_defines_or_exports_p(opmod, var)) {
+                            jl_printf(JL_STDERR,
+                                      "WARNING: module %s should explicitly import %s from %s\n",
+                                      m->name->name, var->name, b->owner->name->name);
+                            return b2;
+                        }
+                    }
                     jl_errorf("error in method definition: function %s.%s must be explicitly imported to be extended", b->owner->name->name, var->name);
                 }
             }

src/toplevel.c

@@ -42,6 +42,7 @@ void jl_add_standard_imports(jl_module_t *m)
     jl_module_using(m, jl_base_module);
     // import Base.call
     jl_module_import(m, jl_base_module, jl_symbol("call"));
+    m->std_imports = 1;
 }
 
 jl_module_t *jl_new_main_module(void)