private void createBlocks()
{
for (int i = 0; i < MapInfo.Blocks.Count; i++)
{
for (int j = 0; j < MapInfo.Blocks[i].Count; j++)
{
BlockBuilder blockBuilder = new BlockBuilder();
blocks.Add(blockBuilder.BuildBlock(MapInfo.Blocks[i][j]));
}
}
}
private BoundBlock BuildBlock(BoundStatement node)
{
var block = node as BoundBlock;
if (block != null)
return block;
var builder = new BlockBuilder(this);
builder.Add(node);
return builder.BuildBlock(node.Location);
}
private BoundBlock BuildBlock(SyntaxNode syntax, SourceLocation location)
{
IEnumerable<SyntaxNode> items;
var block = syntax as BlockSyntax;
if (block != null)
items = block.Statements;
else
items = new[] { syntax };
var builder = new BlockBuilder(this);
foreach (var item in items)
{
var node = item.Accept(this);
var statement =
node as BoundStatement ??
new BoundExpressionStatement((BoundExpression)node, GetLocation(item));
builder.Add(statement);
}
return builder.BuildBlock(location ?? SourceLocation.Missing);
}
private BoundStatement BuildSet(IIdentifier identifier, BoundExpression value)
{
switch (identifier.Type)
{
case IdentifierType.Parameter:
return new BoundSetVariable(
_scope.GetArgument(identifier),
value,
SourceLocation.Missing
);
case IdentifierType.Scoped:
var builder = new BlockBuilder(this);
var valueTemporary = builder.CreateTemporary();
builder.Add(new BoundSetVariable(
valueTemporary,
value,
SourceLocation.Missing
));
builder.Add(BuildSetWithScope(builder, identifier.WithScope, identifier.Fallback, valueTemporary));
return builder.BuildBlock(SourceLocation.Missing);
case IdentifierType.Local:
case IdentifierType.Global:
if (identifier.Type == IdentifierType.Global)
_scope.IsGlobalScopeReferenced = true;
if (identifier.Closure == null)
return new BoundSetVariable(_scope.GetLocal(identifier), value, SourceLocation.Missing);
return new BoundSetVariable(
_scope.GetClosureField(identifier),
value,
SourceLocation.Missing
);
/*
// These are handled upstream.
case IdentifierType.This:
case IdentifierType.Null:
case IdentifierType.Undefined:
case IdentifierType.Arguments:
*/
default:
throw new InvalidOperationException("Cannot find variable of argument");
}
}
private BoundIf BuildGetWithScope(BlockBuilder builder, WithScope withScope, IIdentifier fallback, BoundTemporary result, BoundTemporary withTarget)
{
var withLocal = builder.CreateTemporary();
builder.Add(new BoundSetVariable(
withLocal,
new BoundGetVariable(_withIdentifiers[withScope.Identifier]),
SourceLocation.Missing
));
var getter = new BlockBuilder(this);
if (withTarget != null)
{
getter.Add(new BoundSetVariable(
withTarget,
new BoundGetVariable(withLocal),
SourceLocation.Missing
));
}
getter.Add(new BoundSetVariable(
result,
BuildGetMember(
new BoundGetVariable(withLocal),
BoundConstant.Create(fallback.Name)
),
SourceLocation.Missing
));
BoundBlock @else;
if (withScope.Parent == null)
{
@else = BuildBlock(new BoundSetVariable(
result,
BuildGet(
fallback,
null
),
SourceLocation.Missing
));
}
else
{
@else = BuildBlock(BuildGetWithScope(
builder,
withScope.Parent,
fallback,
result,
withTarget
));
}
return new BoundIf(
new BoundHasMember(
new BoundGetVariable(withLocal),
fallback.Name
),
getter.BuildBlock(SourceLocation.Missing),
@else,
SourceLocation.Missing
);
}