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#include "stdafx.h"
#include "ToS.h"
#include "Package.h"
#include "Scope.h"
#include "Type.h"
#include "Exception.h"
#include "Engine.h"
namespace storm {
/**
* Generation of toS() from toS(StrBuf):
*/
ToSTemplate::ToSTemplate() : Template(new (engine()) Str(S("toS"))) {}
MAYBE(Named *) ToSTemplate::generate(SimplePart *part) {
Array<Value> *params = part->params;
if (params->count() != 1)
return null;
Value type = params->at(0);
// Only ever needed for value types or built-in types.
if (!type.isValue())
return null;
if (type.type == null)
return null;
// Find a toS(StrBuf) function for the type:
SimplePart *toFind = new (this) SimplePart(S("toS"));
toFind->params->push(thisPtr(type.type));
toFind->params->push(StrBuf::stormType(engine()));
// We only examine member functions of the type:
if (Function *found = as<Function>(type.type->findHere(toFind, engine().scope())))
return new (this) ToSFunction(found);
// Otherwise, nothing to generate.
return null;
}
ToSFunction::ToSFunction(Function *use)
: Function(Value(StormInfo<Str>::type(use->engine())),
new (use) Str(S("toS")),
new (use) Array<Value>(1, thisPtr(use->params->at(0).type))),
use (use) {
setCode(new (engine()) LazyCode(fnPtr(engine(), &ToSFunction::create, this)));
// Add a listener to the target type and remove ourselves whenever that function gains a toS
// function.
use->params->at(0).type->watchAdd(this);
}
void ToSFunction::notifyAdded(NameSet *to, Named *added) {
if (*added->name == S("toS") && added->params->count() == 1 && added->params->at(0).type == to && as<Function>(added)) {
// Found a toS function that was added. Remove ourselves from our parent:
if (NameSet *inside = as<NameSet>(parentLookup())) {
inside->remove(this);
to->watchRemove(this);
}
}
}
CodeGen *ToSFunction::create() {
using namespace code;
Value type = params->at(0);
CodeGen *to = new (this) CodeGen(use->runOn(), isMember(), Value(Str::stormType(engine())));
Var param = to->createParam(type);
*to->l << prolog();
Type *strBufT = StrBuf::stormType(engine());
Var strBuf = allocObject(to, strBufT);
// Call the toS function:
Array<Operand> *p = new (this) Array<Operand>();
p->push(param);
p->push(strBuf);
use->localCall(to, p, new (this) CodeResult(), false);
// Call 'toS' on the StrBuf to get the string.
Function *toS = as<Function>(strBufT->find(S("toS"), thisPtr(strBufT), engine().scope()));
if (!toS)
throw new (this) InternalError(S("Can not find 'toS' for the StrBuf type!"));
CodeResult *str = new (this) CodeResult(result, to->l->root());
p = new (this) Array<Operand>();
p->push(strBuf);
toS->localCall(to, p, str, false);
to->returnValue(str->location(to));
return to;
}
/**
* Generation of '<<' from 'toS()' or 'toS(StrBuf)':
*/
OutputOperatorTemplate::OutputOperatorTemplate() : Template(new (engine()) Str(S("<<"))) {}
MAYBE(Named *) OutputOperatorTemplate::generate(SimplePart *part) {
Array<Value> *params = part->params;
if (params->count() != 2)
return null;
Type *strBufType = StrBuf::stormType(engine());
// Note: We accept subtypes to StrBuf if anyone subclasses it.
if (!Value(strBufType).mayStore(params->at(0).asRef(false)))
return null;
// Only needed for value types:
Value type = params->at(1);
if (!type.type || !type.isValue())
return null;
// Find a toS(StrBuf), this is prioritized if it exists:
SimplePart *toFind = new (this) SimplePart(S("toS"));
toFind->params->push(thisPtr(type.type));
toFind->params->push(Value(strBufType));
// We only need to look inside the type:
if (Function *found = as<Function>(type.type->findHere(toFind, engine().scope())))
return new (this) OutputOperator(found);
// If we did not find it, try without the StrBuf parameter:
toFind->params->pop();
if (Function *found = as<Function>(type.type->findHere(toFind, engine().scope())))
return new (this) OutputOperator(found);
// Otherwise, give up.
return null;
}
OutputOperator::OutputOperator(Function *use)
: Function(Value(StrBuf::stormType(use->engine())),
new (use) Str(S("<<")),
valList(use->engine(), 2, Value(StrBuf::stormType(use->engine())), use->params->at(0))),
use(use) {
setCode(new (engine()) LazyCode(fnPtr(engine(), &OutputOperator::create, this)));
}
CodeGen *OutputOperator::create() {
using namespace code;
Value strBuf = params->at(0);
Value srcType = params->at(1);
CodeGen *to = new (this) CodeGen(runOn(), isMember(), strBuf);
Var strBufParam = to->createParam(strBuf);
Var srcParam = to->createParam(srcType);
*to->l << prolog();
// Two options, either 'toS()' or 'toS(StrBuf)':
if (use->params->count() == 2) {
// toS(StrBuf):
Array<Operand> *ops = new (this) Array<Operand>();
ops->push(srcParam);
ops->push(strBufParam);
use->autoCall(to, ops, new (this) CodeResult());
} else {
// toS():
Value strType(Str::stormType(engine()));
CodeResult *strResult = new (this) CodeResult(strType, to->l->root());
Array<Operand> *ops = new (this) Array<Operand>();
ops->push(srcParam);
use->autoCall(to, ops, strResult);
// Find the regular <<(Str) operator:
Array<Value> *params = new (this) Array<Value>(2, thisPtr(strBuf.type));
params->at(1) = strType;
Function *outputStr = as<Function>(strBuf.type->find(S("<<"), params, engine().scope()));
if (!outputStr)
throw new (this) InternalError(S("Can not find '<<(StrBuf, Str)' in StrBuf!"));
ops = new (this) Array<Operand>();
ops->push(strBufParam);
ops->push(strResult->location(to));
outputStr->autoCall(to, ops, new (this) CodeResult());
}
to->returnValue(strBufParam);
return to;
}
}
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