From c465702dbeb1ea63a356146403eee668fb59371d Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Thu, 25 Jun 2009 19:21:31 +0000
Subject: Stubs for CPS conversion.

git-svn-id: http://svn.drobilla.net/resp/tuplr@148 ad02d1e2-f140-0410-9f75-f8b11f17cedd
---
 tuplr.hpp | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

(limited to 'tuplr.hpp')

diff --git a/tuplr.hpp b/tuplr.hpp
index 3c6bc81..fb16fe7 100644
--- a/tuplr.hpp
+++ b/tuplr.hpp
@@ -196,6 +196,7 @@ struct AST : public Object {
 	virtual bool   operator==(const AST& o) const = 0;
 	virtual bool   contains(const AST* child) const { return false; }
 	virtual void   constrain(TEnv& tenv, Constraints& c) const {}
+	virtual AST*   cps(TEnv& tenv, AST* cont);
 	virtual void   lift(CEnv& cenv) {}
 	virtual CValue compile(CEnv& cenv) = 0;
 	string str() const { ostringstream ss; ss << this; return ss.str(); }
@@ -254,7 +255,6 @@ struct ATuple : public AST, public vector<AST*> {
 				return false;
 		return true;
 	}
-	void lift(CEnv& cenv) { FOREACH(iterator, t, *this) (*t)->lift(cenv); }
 	bool contains(AST* child) const {
 		if (*this == *child) return true;
 		FOREACH(const_iterator, p, *this)
@@ -262,7 +262,10 @@ struct ATuple : public AST, public vector<AST*> {
 				return true;
 		return false;
 	}
-	void   constrain(TEnv& tenv, Constraints& c) const;
+	void constrain(TEnv& tenv, Constraints& c) const;
+	AST* cps(TEnv& tenv, AST* cont);
+	void lift(CEnv& cenv) { FOREACH(iterator, t, *this) (*t)->lift(cenv); }
+
 	CValue compile(CEnv& cenv) { throw Error(loc, "tuple compiled"); }
 };
 
@@ -340,13 +343,13 @@ struct Subst : public map<const AType*,AType*,typeLessThan> {
 	}
 };
 
-
-/// Closure (first-class function with captured lexical bindings)
+/// Fn (first-class function with captured lexical bindings)
 struct AFn : public ATuple {
 	AFn(Cursor c, ASymbol* fn, ATuple* p, const string& n="")
 		: ATuple(c, fn, p, NULL), name(n) {}
 	bool    operator==(const AST& rhs) const { return this == &rhs; }
 	void    constrain(TEnv& tenv, Constraints& c) const;
+	AST*    cps(TEnv& tenv, AST* cont);
 	void    lift(CEnv& cenv);
 	void    liftCall(CEnv& cenv, const AType& argsT);
 	CValue  compile(CEnv& cenv);
@@ -368,7 +371,19 @@ struct AFn : public ATuple {
 /// Function call/application, e.g. "(func arg1 arg2)"
 struct ACall : public ATuple {
 	ACall(const SExp& e, const ATuple& t) : ATuple(e.loc, t) {}
+	ACall(Cursor c, const ATuple& code) : ATuple(c, code) {}
+	ACall(Cursor c, AST* fn, AST* arg, ...) : ATuple(c) {
+		push_back(fn);
+		if (!arg) return;
+		va_list args; va_start(args, arg);
+		if (arg)
+			push_back(arg);
+		for (AST* a = va_arg(args, AST*); a; a = va_arg(args, AST*))
+			push_back(a);
+		va_end(args);
+	}
 	void   constrain(TEnv& tenv, Constraints& c) const;
+	AST*   cps(TEnv& tenv, AST* cont);
 	void   lift(CEnv& cenv);
 	CValue compile(CEnv& cenv);
 };
@@ -376,6 +391,7 @@ struct ACall : public ATuple {
 /// Definition special form, e.g. "(def x 2)"
 struct ADef : public ACall {
 	ADef(const SExp& e, const ATuple& t) : ACall(e, t) {}
+	ADef(Cursor c, const ATuple& code) : ACall(c, code) {}
 	ASymbol* sym() const {
 		ASymbol* sym = at(1)->to<ASymbol*>();
 		if (!sym) {
@@ -386,6 +402,7 @@ struct ADef : public ACall {
 		return sym;
 	}
 	void   constrain(TEnv& tenv, Constraints& c) const;
+	AST*   cps(TEnv& tenv, AST* cont);
 	void   lift(CEnv& cenv);
 	CValue compile(CEnv& cenv);
 };
@@ -394,6 +411,7 @@ struct ADef : public ACall {
 struct AIf : public ACall {
 	AIf(const SExp& e, const ATuple& t) : ACall(e, t) {}
 	void   constrain(TEnv& tenv, Constraints& c) const;
+	AST*   cps(TEnv& tenv, AST* cont);
 	CValue compile(CEnv& cenv);
 };
 
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