Implement backtick (repr)

src/analysis/scoping_analysis.cpp

@@ -189,6 +189,7 @@ class NameCollectorVisitor : public ASTVisitor {
         virtual bool visit_num(AST_Num *node) { return false; }
         virtual bool visit_pass(AST_Pass *node) { return false; }
         virtual bool visit_print(AST_Print *node) { return false; }
+        virtual bool visit_repr(AST_Repr *node) { return false; }
         virtual bool visit_return(AST_Return *node) { return false; }
         virtual bool visit_slice(AST_Slice *node) { return false; }
         virtual bool visit_str(AST_Str *node) { return false; }

src/analysis/type_analysis.cpp

@@ -358,6 +358,10 @@ class BasicBlockTypePropagator : public ExprVisitor, public StmtVisitor {
             abort();
         }
 
+        virtual void* visit_repr(AST_Repr *node) {
+            return STR;
+        }
+
         virtual void* visit_slice(AST_Slice *node) {
             return SLICE;
         }

src/codegen/irgen/irgenerator.cpp

@@ -707,6 +707,20 @@ class IRGeneratorImpl : public IRGenerator {
                 RELEASE_ASSERT(0, "");
         }
 
+        CompilerVariable* evalRepr(AST_Repr *node) {
+            assert(state != PARTIAL);
+
+            CompilerVariable *var = evalExpr(node->value);
+            ConcreteCompilerVariable *cvar = var->makeConverted(emitter, var->getBoxType());
+            var->decvref(emitter);
+
+            std::vector<llvm::Value*> args{cvar->getValue()};
+            llvm::Value* rtn = emitter.getBuilder()->CreateCall(g.funcs.repr, args);
+            cvar->decvref(emitter);
+
+            return new ConcreteCompilerVariable(STR, rtn, true);
+        }
+
         CompilerVariable* evalSlice(AST_Slice *node) {
             assert(state != PARTIAL);
 
@@ -848,6 +862,9 @@ class IRGeneratorImpl : public IRGenerator {
                     case AST_TYPE::Num:
                         rtn = evalNum(ast_cast<AST_Num>(node));
                         break;
+                    case AST_TYPE::Repr:
+                        rtn = evalRepr(ast_cast<AST_Repr>(node));
+                        break;
                     case AST_TYPE::Slice:
                         rtn = evalSlice(ast_cast<AST_Slice>(node));
                         break;
@@ -867,7 +884,7 @@ class IRGeneratorImpl : public IRGenerator {
                         rtn = evalClsAttribute(ast_cast<AST_ClsAttribute>(node));
                         break;
                     default:
-                        printf("Unhandled expr type: %d (irgen.cpp:" STRINGIFY(__LINE__) ")\n", node->type);
+                        printf("Unhandled expr type: %d (irgenerator.cpp:" STRINGIFY(__LINE__) ")\n", node->type);
                         exit(1);
                 }
 

src/codegen/parser.cpp

@@ -493,6 +493,15 @@ AST_Num* read_num(BufferedReader *reader) {
     return rtn;
 }
 
+AST_Repr* read_repr(BufferedReader *reader) {
+    AST_Repr *rtn = new AST_Repr();
+    rtn->col_offset = readColOffset(reader);
+    rtn->lineno = reader->readULL();
+    rtn->value = readASTExpr(reader);
+
+    return rtn;
+}
+
 AST_Pass* read_pass(BufferedReader *reader) {
     AST_Pass *rtn = new AST_Pass();
 
@@ -636,6 +645,8 @@ AST_expr* readASTExpr(BufferedReader *reader) {
             return read_name(reader);
         case AST_TYPE::Num:
             return read_num(reader);
+        case AST_TYPE::Repr:
+            return read_repr(reader);
         case AST_TYPE::Slice:
             return read_slice(reader);
         case AST_TYPE::Str:

src/codegen/runtime_hooks.cpp

@@ -159,6 +159,7 @@ void initGlobalFuncs(GlobalState &g) {
     GET(getclsattr);
     GET(unaryop);
     GET(import);
+    GET(repr);
 
     GET(checkUnpackingLength);
     GET(raiseAttributeError);

src/codegen/runtime_hooks.h

@@ -21,7 +21,7 @@ struct GlobalFuncs {
     llvm::Value *printf, *my_assert, *malloc, *free;
 
     llvm::Value *boxInt, *unboxInt, *boxFloat, *unboxFloat, *boxStringPtr, *boxCLFunction, *unboxCLFunction, *boxInstanceMethod, *boxBool, *unboxBool, *createTuple, *createDict, *createList, *createSlice, *createClass;
-    llvm::Value *getattr, *setattr, *print, *nonzero, *binop, *compare, *augbinop, *unboxedLen, *getitem, *getclsattr, *getGlobal, *setitem, *unaryop, *import;
+    llvm::Value *getattr, *setattr, *print, *nonzero, *binop, *compare, *augbinop, *unboxedLen, *getitem, *getclsattr, *getGlobal, *setitem, *unaryop, *import, *repr;
     llvm::Value *checkUnpackingLength, *raiseAttributeError, *raiseAttributeErrorStr, *raiseNotIterableError, *assertNameDefined, *assertFail;
     llvm::Value *printFloat, *listAppendInternal;
     llvm::Value *dump;

src/core/ast.cpp

@@ -529,6 +529,15 @@ void* AST_Num::accept_expr(ExprVisitor *v) {
     return v->visit_num(this);
 }
 
+void AST_Repr::accept(ASTVisitor *v) {
+    bool skip = v->visit_repr(this);
+}
+
+void* AST_Repr::accept_expr(ExprVisitor *v) {
+    return v->visit_repr(this);
+}
+
+
 void AST_Pass::accept(ASTVisitor *v) {
     bool skip = v->visit_pass(this);
 }
@@ -1104,6 +1113,13 @@ bool PrintVisitor::visit_print(AST_Print *node) {
     return true;
 }
 
+bool PrintVisitor::visit_repr(AST_Repr *node) {
+    printf("`");
+    node->value->accept(this);
+    printf("`");
+    return false;
+}
+
 bool PrintVisitor::visit_return(AST_Return *node) {
     printf("return ");
     return false;
@@ -1280,6 +1296,7 @@ class FlattenVisitor : public ASTVisitor {
         virtual bool visit_num(AST_Num *node) { output->push_back(node); return false; }
         virtual bool visit_pass(AST_Pass *node) { output->push_back(node); return false; }
         virtual bool visit_print(AST_Print *node) { output->push_back(node); return false; }
+        virtual bool visit_repr(AST_Repr *node) { output->push_back(node); return false; }
         virtual bool visit_return(AST_Return *node) { output->push_back(node); return false; }
         virtual bool visit_slice(AST_Slice *node) { output->push_back(node); return false; }
         virtual bool visit_str(AST_Str *node) { output->push_back(node); return false; }

src/core/ast.h

@@ -560,6 +560,18 @@ class AST_Num : public AST_expr {
         static const AST_TYPE::AST_TYPE TYPE = AST_TYPE::Num;
 };
 
+class AST_Repr : public AST_expr {
+    public:
+        AST_expr* value;
+
+        virtual void accept(ASTVisitor *v);
+        virtual void* accept_expr(ExprVisitor *v);
+
+        AST_Repr() : AST_expr(AST_TYPE::Repr) {}
+
+        static const AST_TYPE::AST_TYPE TYPE = AST_TYPE::Repr;
+};
+
 class AST_Pass : public AST_stmt {
     public:
         virtual void accept(ASTVisitor *v);
@@ -776,6 +788,7 @@ class ASTVisitor {
         virtual bool visit_num(AST_Num *node) { assert(0); abort(); }
         virtual bool visit_pass(AST_Pass *node) { assert(0); abort(); }
         virtual bool visit_print(AST_Print *node) { assert(0); abort(); }
+        virtual bool visit_repr(AST_Repr *node) { assert(0); abort(); }
         virtual bool visit_return(AST_Return *node) { assert(0); abort(); }
         virtual bool visit_slice(AST_Slice *node) { assert(0); abort(); }
         virtual bool visit_str(AST_Str *node) { assert(0); abort(); }
@@ -828,6 +841,7 @@ class NoopASTVisitor : public ASTVisitor {
         virtual bool visit_num(AST_Num *node) { return false; }
         virtual bool visit_pass(AST_Pass *node) { return false; }
         virtual bool visit_print(AST_Print *node) { return false; }
+        virtual bool visit_repr(AST_Repr *node) { return false; }
         virtual bool visit_return(AST_Return *node) { return false; }
         virtual bool visit_slice(AST_Slice *node) { return false; }
         virtual bool visit_str(AST_Str *node) { return false; }
@@ -860,6 +874,7 @@ class ExprVisitor {
         virtual void* visit_listcomp(AST_ListComp *node) { assert(0); abort(); }
         virtual void* visit_name(AST_Name *node) { assert(0); abort(); }
         virtual void* visit_num(AST_Num *node) { assert(0); abort(); }
+        virtual void* visit_repr(AST_Repr *node) { assert(0); abort(); }
         virtual void* visit_slice(AST_Slice *node) { assert(0); abort(); }
         virtual void* visit_str(AST_Str *node) { assert(0); abort(); }
         virtual void* visit_subscript(AST_Subscript *node) { assert(0); abort(); }
@@ -938,6 +953,7 @@ class PrintVisitor : public ASTVisitor {
         virtual bool visit_num(AST_Num *node);
         virtual bool visit_pass(AST_Pass *node);
         virtual bool visit_print(AST_Print *node);
+        virtual bool visit_repr(AST_Repr *node);
         virtual bool visit_return(AST_Return *node);
         virtual bool visit_slice(AST_Slice *node);
         virtual bool visit_str(AST_Str *node);

src/core/cfg.cpp

@@ -542,6 +542,14 @@ class CFGVisitor : public ASTVisitor {
             return makeName(rtn_name, AST_TYPE::Load);
         };
 
+        AST_expr* remapRepr(AST_Repr* node) {
+            AST_Repr *rtn = new AST_Repr();
+            rtn->lineno = node->lineno;
+            rtn->col_offset = node->col_offset;
+            rtn->value = remapExpr(node->value);
+            return rtn;
+        }
+
         AST_expr* remapSlice(AST_Slice* node) {
             AST_Slice *rtn = new AST_Slice();
             rtn->lineno = node->lineno;
@@ -627,6 +635,9 @@ class CFGVisitor : public ASTVisitor {
                     return node;
                 case AST_TYPE::Num:
                     return node;
+                case AST_TYPE::Repr:
+                    rtn = remapRepr(ast_cast<AST_Repr>(node));
+                    break;
                 case AST_TYPE::Slice:
                     rtn = remapSlice(ast_cast<AST_Slice>(node));
                     break;

src/runtime/dict.cpp

@@ -34,8 +34,8 @@ Box* dictRepr(BoxedDict* self) {
         }
         first = false;
 
-        BoxedString *k = repr(p.first);
-        BoxedString *v = repr(p.second);
+        BoxedString *k = static_cast<BoxedString*>(repr(p.first));
+        BoxedString *v = static_cast<BoxedString*>(repr(p.second));
         chars.insert(chars.end(), k->s.begin(), k->s.end());
         chars.push_back(':');
         chars.push_back(' ');
@@ -79,7 +79,7 @@ Box* dictGetitem(BoxedDict* self, Box* k) {
     Box* &pos = self->d[k];
 
     if (pos == NULL) {
-        BoxedString *s = repr(k);
+        BoxedString *s = static_cast<BoxedString*>(repr(k));
         fprintf(stderr, "KeyError: %s\n", s->s.c_str());
         raiseExc();
     }

src/runtime/inline/link_forcer.cpp

@@ -70,6 +70,7 @@ void force() {
     FORCE(setitem);
     FORCE(unaryop);
     FORCE(import);
+    FORCE(repr);
 
     FORCE(checkUnpackingLength);
     FORCE(raiseAttributeError);

src/runtime/list.cpp

@@ -41,7 +41,7 @@ extern "C" Box* listRepr(BoxedList* self) {
         if (i > 0)
             os << ", ";
 
-        BoxedString *s = repr(self->elts->elts[i]);
+        BoxedString *s = static_cast<BoxedString*>(repr(self->elts->elts[i]));
         os << s->s;
     }
     os << ']';

src/runtime/objmodel.cpp

@@ -949,7 +949,7 @@ extern "C" BoxedString* str(Box* obj) {
     return static_cast<BoxedString*>(obj);
 }
 
-extern "C" BoxedString* repr(Box* obj) {
+extern "C" Box* repr(Box* obj) {
     static StatCounter slowpath_repr("slowpath_repr");
     slowpath_repr.log();
 

src/runtime/objmodel.h

@@ -39,7 +39,7 @@ extern "C" bool nonzero(Box* obj);
 extern "C" Box* runtimeCall(Box*, int64_t, Box*, Box*, Box*, Box**);
 extern "C" Box* callattr(Box*, std::string*, bool, int64_t, Box*, Box*, Box*, Box**);
 extern "C" BoxedString* str(Box* obj);
-extern "C" BoxedString* repr(Box* obj);
+extern "C" Box* repr(Box* obj);
 extern "C" BoxedInt* hash(Box* obj);
 //extern "C" Box* abs_(Box* obj);
 //extern "C" Box* min_(Box* o0, Box* o1);

src/runtime/set.cpp

@@ -107,7 +107,7 @@ Box* setRepr(BoxedSet* self) {
         if (!first) {
             os << ", ";
         }
-        os << repr(elt)->s;
+        os << static_cast<BoxedString*>(repr(elt))->s;
         first = false;
     }
     os << "])";

src/runtime/tuple.cpp

@@ -72,7 +72,7 @@ Box* tupleRepr(BoxedTuple *t) {
     for (int i = 0; i < n; i++) {
         if (i) os << ", ";
 
-        BoxedString *elt_repr =repr(t->elts[i]);
+        BoxedString *elt_repr = static_cast<BoxedString*>(repr(t->elts[i]));
         os << elt_repr->s;
     }
     if (n == 1) os << ",";

src/runtime/types.cpp

@@ -274,9 +274,9 @@ Box* instancemethodRepr(BoxedInstanceMethod* self) {
 }
 
 Box* sliceRepr(BoxedSlice* self) {
-    BoxedString *start = repr(self->start);
-    BoxedString *stop = repr(self->stop);
-    BoxedString *step = repr(self->step);
+    BoxedString *start = static_cast<BoxedString*>(repr(self->start));
+    BoxedString *stop = static_cast<BoxedString*>(repr(self->stop));
+    BoxedString *step = static_cast<BoxedString*>(repr(self->step));
     std::string s = "slice(" + start->s + ", " + stop->s + ", " + step->s + ")";
     return new BoxedString(s);
 }

test/tests/backtick.py

+print `42`
+print `int`
+print `2+3`
+i = 23
+print `i`
+s = 'test'
+print `s`