Turn main into an ordinary function.

BitcodeEmitter.hpp

@@ -44,7 +44,6 @@ public:
     virtual void emit(Assert const&) override;
     virtual void emit(FunctionCall const&) override;
     virtual void emit(Branch const&) override;
-    virtual void emit(Main const&) override;
     virtual void emit(Function const&) override;
     virtual void emit(Module const&) override;
     virtual void emit(Program const&) override;

CppEmitter.cpp

@@ -80,7 +80,7 @@ void CppEmitter::emitStatements(PointerList<Statement> const& node) {
     }
 }
 
-void CppEmitter::emit(Main const& main) {
+void CppEmitter::emitMain(Function const& main) {
     stream << "int main() {\n";
     indent();
         emitStatements(main.getBody());

CppEmitter.hpp

@@ -41,7 +41,6 @@ public:
     virtual void emit(Assert const&) override;
     virtual void emit(FunctionCall const&) override;
     virtual void emit(Branch const&) override;
-    virtual void emit(Main const&) override;
     virtual void emit(Function const&) override;
     virtual void emit(Module const&) override;
     virtual void emit(Program const&) override;
@@ -59,6 +58,7 @@ private:
     void emitStatements(PointerList<Statement> const& node);
     void emitBranchCondition(SemiExpression const& node);
     void emitBranchCase(BranchCase const& node);
+    void emitMain(Function const& main);
 
     void indent();
     void dedent();

Emitter.hpp

@@ -55,7 +55,6 @@ public:
     virtual void emit(Assert const&) = 0;
     virtual void emit(FunctionCall const&) = 0;
     virtual void emit(Branch const&) = 0;
-    virtual void emit(Main const&) = 0;
     virtual void emit(Function const&) = 0;
     virtual void emit(Module const&) = 0;
     virtual void emit(Program const&) = 0;

Monicelli.ypp

@@ -100,7 +100,6 @@
     Function* funval;
     FunArg *argval;
     PointerList<FunArg> *arglistval;
-    Main* mainval;
 }
 
 %type<intval> NUMBER
@@ -114,7 +113,7 @@
 %type<callval> fun_call
 %type<argval> arg_decl
 %type<arglistval> args_decl args
-%type<funval> fun_decl
+%type<funval> fun_decl main
 %type<printval> print_stmt
 %type<inputval> input_stmt
 %type<abortval> abort_stmt
@@ -130,7 +129,6 @@
 %type<semiexpval> semi_expression
 %type<idval> variable
 %type<numericval> numeric
-%type<mainval> main
 %type<boolval> pointer
 
 %start program
@@ -182,7 +180,7 @@ arg_decl:
 ;
 main:
     MAIN statements {
-        $$ = new Main($2);
+        $$ = makeMain($2);
     }
 ;
 statements:

Nodes.cpp

@@ -0,0 +1,35 @@
+/*
+ * Monicelli: an esoteric language compiler
+ * 
+ * Copyright (C) 2014 Stefano Sanfilippo
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "Nodes.hpp"
+#include <string>
+
+using namespace monicelli;
+
+static const std::string MONICELLI_ENTRYPOINT = "__Monicelli_main";
+
+Function *monicelli::makeMain(PointerList<Statement> *body) {
+    PointerList<FunArg> *noargs = new PointerList<FunArg>();
+
+    return new Function(
+        new Id(new std::string(MONICELLI_ENTRYPOINT)),
+        Type::VOID, noargs, body
+    );
+}
+

Nodes.hpp

@@ -371,22 +371,7 @@ private:
 };
 
 
-class Main: public Emittable {
-public:
-    Main(PointerList<Statement> *s): body(s) {}
-
-    virtual void emit(Emitter *emitter) const {
-        emitter->emit(*this);
-    }
-
-    PointerList<Statement> const& getBody() const {
-        return *body;
-    }
-
-private:
-    Pointer<PointerList<Statement>> body;
-};
-
+Function *makeMain(PointerList<Statement> *body);
 
 class FunArg {
 public:
@@ -499,8 +484,8 @@ public:
         emitter->emit(*this);
     }
 
-    void setMain(Main *m) {
-        main = Pointer<Main>(m);
+    void setMain(Function *m) {
+        main = Pointer<Function>(m);
     }
 
     void addFunction(Function *f) {
@@ -512,7 +497,7 @@ public:
         delete m;
     }
 
-    boost::optional<Main const&> getMain() const {
+    boost::optional<Function const&> getMain() const {
         maybe_return(main);
     }
 
@@ -525,7 +510,7 @@ public:
     }
 
 private:
-    Pointer<Main> main;
+    Pointer<Function> main;
     PointerList<Function> functions;
     std::unordered_set<Module> modules;
 };