private void LdTid(EmitSyntax emit, CilSymbolRef tid)
{
if (tid.Type != null)
{
emit
.Ldtoken(emit.Types.Import(tid.Type))
.Call((RuntimeTypeHandle h) => Type.GetTypeFromHandle(h))
;
}
else
{
emit.Ldnull();
}
if (tid.Literal == null)
{
emit.Ldnull();
}
else
{
emit.Ldstr(new QStr(tid.Literal));
}
emit
.Newobj(() => new CilSymbolRef(default(Type), default(string)));
}
public IActionCode SkipAction()
{
emit
.Ldnull()
.Br(RETURN);
return(this);
}
private static EmitSyntax LdMethodDelegate(
this EmitSyntax emit,
Pipe <IMethodNs, DoneMethodSig> methodSig,
Type delegateType)
{
return(emit
.Ldnull()
.Ldftn(emit.Methods.Method(methodSig))
.NewDelegate(delegateType));
}
private EmitSyntax EmitFactoryCode(
EmitSyntax emit,
PlannedClass contextPlannedClass,
Type type,
bool nullAllowed)
{
if (type == typeof(void))
{
}
else if (type == typeof(int))
{
emit = emit.Ldc_I4_0();
}
else if (type.IsValueType)
{
var resultType = emit.Types.Import(type);
var resultLoc = emit.Locals.Generate("result");
emit = emit
.Local(resultLoc, resultType)
.Ldloca(resultLoc.GetRef())
.Initobj(resultType)
.Ldloc(resultLoc.GetRef())
;
}
else if (nullAllowed)
{
emit.Ldnull();
}
else if (!type.IsAbstract && !type.IsInterface)
{
emit = emit.Newobj(
emit.Types.Import(type));
}
else if (contextPlannedClass != null && contextPlannedClass.Implements(type))
{
emit = emit.Ldarg(0);
}
else if (plan.Exists(e => e.Implements(type)))
{
var otherEntry = plan.Find(e => e.Implements(type));
emit = emit.Newobj(
emit.Types.Class_(
ClassName.Parse(
otherEntry.ClassName)));
}
else
{
throw new InvalidOperationException(
"Internal error: non-planned abstract result type");
}
return(emit);
}
public void Build(
EmitSyntax emit,
Pipe <EmitSyntax> ldCursor,
Pipe <EmitSyntax> ldTokenPtr)
{
var labels = emit.Labels;
var locals = emit.Locals;
var RETURN = labels.Generate();
var valueTmp = locals.Generate();
var tokenId = locals.Generate();
emit
.Local(valueTmp, emit.Types.Object)
.Ldnull()
.Stloc(valueTmp.GetRef())
.Local(tokenId, emit.Types.Int32)
.Ldc_I4(-1)
.Stloc(tokenId.GetRef())
;
int ruleCount = data.Grammar.Conditions.Sum(cond => cond.Matchers.Count);
var action = new Ref <Labels> [ruleCount];
for (int i = 0; i != ruleCount; ++i)
{
action[i] = labels.Generate().GetRef();
}
emit
.Do(ldCursor)
.Ldfld((ScanCursor c) => c.CurrentActionId)
.Switch(action)
;
foreach (var cond in data.Grammar.Conditions)
{
var contextResolver = new ContextCode(
emit,
il => il
.Do(ldCursor)
.Ldfld((ScanCursor c) => c.RootContext),
null,
data,
cond.ContextProvider);
IActionCode code = new MatcherCode(
emit,
contextResolver,
ldCursor,
declaringType,
data.Grammar.Conditions,
RETURN.GetRef());
foreach (var matcher in cond.Matchers)
{
emit
.Label(action[matcher.Index].Def)
.Ldc_I4(matcher.Outcome == null ? -1 : matcher.Outcome.Index)
.Stloc(tokenId.GetRef())
;
var productionBinding = matcher.Joint.The <CilMatcher>();
code = code
.Do(productionBinding.Context.Load)
.Do(productionBinding.ActionBuilder);
}
}
// Load null value for incorrectly implemented actions
emit.Ldnull();
emit
.Label(RETURN)
.Stloc(valueTmp.GetRef())
.Do(ldTokenPtr)
.Ldloc(valueTmp.GetRef())
.Stind_Ref()
.Ldloc(tokenId.GetRef())
.Ret()
;
}
public void BuildBody(
EmitSyntax emit,
LanguageData data,
Ref <Args> ruleId,
Ref <Args> ruleArgs,
Ref <Args> argsStart,
Ref <Args> ctx,
Ref <Args> lookbackStart)
{
Def <Labels> returnLabel = emit.Labels.Generate();
var contextCode = new ContextCode(
emit,
il => il.Ldarg(ctx),
il => il.Ldarg(lookbackStart),
data,
data.Grammar.GlobalContextProvider,
data.LocalParseContexts);
IActionCode code = new ProductionCode(
emit,
contextCode,
ldRuleArgs: il => il.Ldarg(ruleArgs),
ldArgsStart: il => il.Ldarg(argsStart),
returnLabel: returnLabel);
var defaultLabel = emit.Labels.Generate();
var endWithSingleResultLabel = emit.Labels.Generate();
var jumpTable = new Ref <Labels> [data.Grammar.Productions.Count];
for (int i = 0; i != jumpTable.Length; ++i)
{
jumpTable[i] = emit.Labels.Generate().GetRef();
}
emit
.Do(il => il.Ldarg(ruleId))
.Switch(jumpTable)
.Br(defaultLabel.GetRef());
foreach (var prod in data.Grammar.Productions)
{
emit.Label(jumpTable[prod.Index].Def);
if (0 == prod.Actions.Count)
{
// Augumented start rule has null action and should never be invoked.
// Also it is possible that for some platforms production may have default
// action.
emit.Ldnull();
}
else
{
foreach (var action in prod.Actions)
{
code = GenerateActionCode(code, action);
}
}
emit.Br(endWithSingleResultLabel.GetRef());
}
emit
.Label(defaultLabel)
.Ldnull()
.Label(endWithSingleResultLabel)
.Label(returnLabel)
.Ret();
}
public void BuildBody(
EmitSyntax emit,
LanguageData data,
Ref<Args> ruleId,
Ref<Args> ruleArgs,
Ref<Args> argsStart,
Ref<Args> ctx,
Ref<Args> lookbackStart)
{
Def<Labels> returnLabel = emit.Labels.Generate();
var contextCode = new ContextCode(
emit,
il => il.Ldarg(ctx),
il => il.Ldarg(lookbackStart),
data,
data.Grammar.GlobalContextProvider,
data.LocalParseContexts);
IActionCode code = new ProductionCode(
emit,
contextCode,
ldRuleArgs: il => il.Ldarg(ruleArgs),
ldArgsStart: il => il.Ldarg(argsStart),
returnLabel: returnLabel);
var defaultLabel = emit.Labels.Generate();
var endWithSingleResultLabel = emit.Labels.Generate();
var jumpTable = new Ref<Labels>[data.Grammar.Productions.Count];
for (int i = 0; i != jumpTable.Length; ++i)
{
jumpTable[i] = emit.Labels.Generate().GetRef();
}
emit
.Do(il => il.Ldarg(ruleId))
.Switch(jumpTable)
.Br(defaultLabel.GetRef());
foreach (var prod in data.Grammar.Productions)
{
emit.Label(jumpTable[prod.Index].Def);
if (0 == prod.Actions.Count)
{
// Augumented start rule has null action and should never be invoked.
// Also it is possible that for some platforms production may have default
// action.
emit.Ldnull();
}
else
{
foreach (var action in prod.Actions)
{
code = GenerateActionCode(code, action);
}
}
emit.Br(endWithSingleResultLabel.GetRef());
}
emit
.Label(defaultLabel)
.Ldnull()
.Label(endWithSingleResultLabel)
.Label(returnLabel)
.Ret();
}
public void Build(
EmitSyntax emit,
Pipe<EmitSyntax> ldCursor,
Pipe<EmitSyntax> ldTokenPtr)
{
var labels = emit.Labels;
var locals = emit.Locals;
var RETURN = labels.Generate();
var valueTmp = locals.Generate();
var tokenId = locals.Generate();
emit
.Local(valueTmp, emit.Types.Object)
.Ldnull()
.Stloc(valueTmp.GetRef())
.Local(tokenId, emit.Types.Int32)
.Ldc_I4(-1)
.Stloc(tokenId.GetRef())
;
int ruleCount = data.Grammar.Conditions.Sum(cond => cond.Matchers.Count);
var action = new Ref<Labels>[ruleCount];
for (int i = 0; i != ruleCount; ++i)
{
action[i] = labels.Generate().GetRef();
}
emit
.Do(ldCursor)
.Ldfld((ScanCursor c) => c.CurrentActionId)
.Switch(action)
;
foreach (var cond in data.Grammar.Conditions)
{
var contextResolver = new ContextCode(
emit,
il => il
.Do(ldCursor)
.Ldfld((ScanCursor c) => c.RootContext),
null,
data,
cond.ContextProvider);
IActionCode code = new MatcherCode(
emit,
contextResolver,
ldCursor,
declaringType,
data.Grammar.Conditions,
RETURN.GetRef());
foreach (var matcher in cond.Matchers)
{
emit
.Label(action[matcher.Index].Def)
.Ldc_I4(matcher.Outcome == null ? -1 : matcher.Outcome.Index)
.Stloc(tokenId.GetRef())
;
var productionBinding = matcher.Joint.The<CilMatcher>();
code = code
.Do(productionBinding.Context.Load)
.Do(productionBinding.ActionBuilder);
}
}
// Load null value for incorrectly implemented actions
emit.Ldnull();
emit
.Label(RETURN)
.Stloc(valueTmp.GetRef())
.Do(ldTokenPtr)
.Ldloc(valueTmp.GetRef())
.Stind_Ref()
.Ldloc(tokenId.GetRef())
.Ret()
;
}
private EmitSyntax EmitFactoryCode(
EmitSyntax emit,
PlannedClass contextPlannedClass,
Type type,
bool nullAllowed)
{
if (type == typeof(void))
{
}
else if (type == typeof(int))
{
emit = emit.Ldc_I4_0();
}
else if (type.IsValueType)
{
var resultType = emit.Types.Import(type);
var resultLoc = emit.Locals.Generate("result");
emit = emit
.Local(resultLoc, resultType)
.Ldloca(resultLoc.GetRef())
.Initobj(resultType)
.Ldloc(resultLoc.GetRef())
;
}
else if (nullAllowed)
{
emit.Ldnull();
}
else if (!type.IsAbstract && !type.IsInterface)
{
emit = emit.Newobj(
emit.Types.Import(type));
}
else if (contextPlannedClass != null && contextPlannedClass.Implements(type))
{
emit = emit.Ldarg(0);
}
else if (plan.Exists(e => e.Implements(type)))
{
var otherEntry = plan.Find(e => e.Implements(type));
emit = emit.Newobj(
emit.Types.Class_(
ClassName.Parse(
otherEntry.ClassName)));
}
else
{
throw new InvalidOperationException(
"Internal error: non-planned abstract result type");
}
return emit;
}
private void LdTid(EmitSyntax emit, CilSymbolRef tid)
{
if (tid.Type != null)
{
emit
.Ldtoken(emit.Types.Import(tid.Type))
.Call((RuntimeTypeHandle h) => Type.GetTypeFromHandle(h))
;
}
else
{
emit.Ldnull();
}
if (tid.Literal == null)
{
emit.Ldnull();
}
else
{
emit.Ldstr(new QStr(tid.Literal));
}
emit
.Newobj(() => new CilSymbolRef(default(Type), default(string)));
}
