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()
;
}
public void BuildBody(
EmitSyntax emit,
LanguageData data,
Ref<Args> tokenId,
Ref<Args> oldValue,
Ref<Args> newValue,
Ref<Args> ctx,
Ref<Args> lookbackStart)
{
var mergers = data.Grammar.Mergers;
if (mergers.Count == 0)
{
emit
.Ldarg(oldValue)
.Ret();
return;
}
var contextResolverCode = new ContextCode(
emit,
il => il.Ldarg(ctx),
il => il.Ldarg(lookbackStart),
data,
data.Grammar.GlobalContextProvider,
data.LocalParseContexts);
IActionCode code = new MergeCode(emit, contextResolverCode)
{
LoadOldValue = il => il.Ldarg(oldValue),
LoadNewValue = il => il.Ldarg(newValue),
};
var tokenToRuleIndex = new MutableIntMap<int>(
mergers.Select(
merger =>
new IntArrow<int>(merger.Symbol.Index, merger.Index)));
tokenToRuleIndex.DefaultValue = -1;
var ids = mergers.Select(m => m.Symbol.Index);
IntInterval possibleBounds = new IntInterval(ids.Min(), ids.Max());
var switchGenerator = SwitchGenerator.Sparse(tokenToRuleIndex, possibleBounds);
switchGenerator.Build(
emit,
il => il.Ldarg(tokenId),
(il, value) =>
{
if (value < 0)
{
emit
.Ldarg(newValue)
.Ret();
}
else
{
var merger = mergers[value];
var binding = merger.Joint.The<CilMerger>();
code = code
.Do(binding.Context.Load)
.Do(binding.ActionBuilder)
.Emit(il2 => il2.Ret())
;
}
});
emit
.Ret();
}
public void BuildBody(
EmitSyntax emit,
LanguageData data,
Ref <Args> tokenId,
Ref <Args> oldValue,
Ref <Args> newValue,
Ref <Args> ctx,
Ref <Args> lookbackStart)
{
var mergers = data.Grammar.Mergers;
if (mergers.Count == 0)
{
emit
.Ldarg(oldValue)
.Ret();
return;
}
var contextResolverCode = new ContextCode(
emit,
il => il.Ldarg(ctx),
il => il.Ldarg(lookbackStart),
data,
data.Grammar.GlobalContextProvider,
data.LocalParseContexts);
IActionCode code = new MergeCode(emit, contextResolverCode)
{
LoadOldValue = il => il.Ldarg(oldValue),
LoadNewValue = il => il.Ldarg(newValue),
};
var tokenToRuleIndex = new MutableIntMap <int>(
mergers.Select(
merger =>
new IntArrow <int>(merger.Symbol.Index, merger.Index)));
tokenToRuleIndex.DefaultValue = -1;
var ids = mergers.Select(m => m.Symbol.Index);
IntInterval possibleBounds = new IntInterval(ids.Min(), ids.Max());
var switchGenerator = SwitchGenerator.Sparse(tokenToRuleIndex, possibleBounds);
switchGenerator.Build(
emit,
il => il.Ldarg(tokenId),
(il, value) =>
{
if (value < 0)
{
emit
.Ldarg(newValue)
.Ret();
}
else
{
var merger = mergers[value];
var binding = merger.Joint.The <CilMerger>();
code = code
.Do(binding.Context.Load)
.Do(binding.ActionBuilder)
.Emit(il2 => il2.Ret())
;
}
});
emit
.Ret();
}