public void compile(
List<FrameVar> locals, List<DynamicVar> dynamics, CodeBox code, boolean isLast) {
if (isApplyLocal(locals)) compileApplyLocal(locals, dynamics, code, isLast);
else if (isApplyDynamic(dynamics)) compileApplyDynamic(locals, dynamics, code, isLast);
else if (isApplyFun()) compileApplyFun(locals, dynamics, code, isLast);
else {
code.add(new StartCall(getLineStart()), locals, dynamics);
for (AST arg : args) arg.compile(locals, dynamics, code, false);
op.compile(locals, dynamics, code, false);
code.add(new instrs.apply.Apply(getLineStart(), args.length), locals, dynamics);
}
}
public void compile(
List<FrameVar> locals, List<DynamicVar> dynamics, CodeBox code, boolean isLast) {
// An act definition returns a behaviour. The bindings in the behaviour must
// be constructed as recursive bindings *and* be dynamic variables so that
// '.' can find them. Therefore, compile a behaviour as though it were
// constructed in the context of a letrec, but force the bindings to be
// dynamic...
bindings = Binding.mergeBindings(bindings);
for (Binding b : Binding.valueBindings(bindings)) {
code.add(new Null(getLineStart()), locals, dynamics);
code.add(new NewDynamic(getLineStart()), locals, dynamics);
dynamics = dynamics.map(DynamicVar::incDynamic).cons(new DynamicVar(b.name, 0));
}
for (Binding b : Binding.valueBindings(bindings)) {
b.getValue().compile(locals, dynamics, code, false);
code.add(
new SetDynamic(b.getValue().getLineStart(), lookup(b.name, dynamics).getIndex()),
locals,
dynamics);
code.add(new Pop(b.getValue().getLineStart()), locals, dynamics);
}
orderExports(dynamics);
name.compile(locals, dynamics, code, false);
compileBehaviour(locals, dynamics, code);
// Remove the dynamics...
for (Binding b : Binding.valueBindings(bindings)) {
code.add(new PopDynamic(getLineStart()), locals, dynamics);
dynamics = dynamics.getTail();
}
}
private void compileApplyDynamic(
List<FrameVar> locals, List<DynamicVar> dynamics, CodeBox code, boolean isLast) {
code.add(new StartCall(getLineStart()), locals, dynamics);
for (AST arg : args) arg.compile(locals, dynamics, code, false);
Var v = (Var) op;
lookup(v.name, dynamics).apply(args.length, getLineStart(), code, locals, dynamics, isLast);
}
private void compileApplyFun(
List<FrameVar> locals, List<DynamicVar> dynamics, CodeBox code, boolean isLast) {
code.add(new StartCall(getLineStart()), locals, dynamics);
for (AST arg : args) arg.compile(locals, dynamics, code, false);
Fun fun = (Fun) op;
fun.compileApply(locals, dynamics, code, isLast);
}
public void compile(
List<FrameVar> locals, List<DynamicVar> dynamics, CodeBox code, boolean isLast) {
// The expressions matched by the case arms are set in the stack frame as
// locals...
int base = locals.length();
int index = 0;
for (AST exp : exps) {
exp.compile(locals, dynamics, code, false);
locals = locals.cons(new FrameVar("$case-" + (index++), locals.length()));
code.add(new SetFrame(getLineStart(), locals.length() - 1), locals, dynamics);
code.add(new Pop(getLineStart()), locals, dynamics);
}
compileArms(base, locals, dynamics, code, isLast);
}
public void compileBehaviour(List<FrameVar> locals, List<DynamicVar> dynamics, CodeBox code) {
// Compilation of a behaviour produces a closure-like value that captures
// the current
// dynamics and waits to be transformed into an actor via 'new'.
CodeBox bodyCode = new CodeBox(path, maxLocals() + 1);
// Message will be local 0 in the stack frame...
locals = new Nil<FrameVar>().cons(new FrameVar("$0", 0));
bodyCode.add(new instrs.vars.FrameVar(getLineStart(), 0), locals, dynamics);
Case handlers = new Case(getFirstHandlerLine(), getLineEnd(), new Dec[] {}, new AST[] {}, arms);
handlers.compileArms(0, locals, dynamics, bodyCode, true);
bodyCode.add(new Return(getLineStart()), locals, dynamics);
int initIndex = bodyCode.getCode().size();
init.compile(locals, dynamics, bodyCode, false);
bodyCode.add(new PopFrame(getLineStart()), locals, dynamics);
// Set the locals + 1 since the message is the first local...
code.add(
new instrs.data.Behaviour(
getLineStart(), toKeys(exports.getStrings()), initIndex, bodyCode, handlesTime()),
locals,
dynamics);
}
