diff options
Diffstat (limited to 'src/cmd/compile/internal/ir/type.go')
| -rw-r--r-- | src/cmd/compile/internal/ir/type.go | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/src/cmd/compile/internal/ir/type.go b/src/cmd/compile/internal/ir/type.go index a903ea8cd4..63dd673dcd 100644 --- a/src/cmd/compile/internal/ir/type.go +++ b/src/cmd/compile/internal/ir/type.go @@ -300,11 +300,36 @@ func (n *typeNode) CanBeNtype() {} // TypeNode returns the Node representing the type t. func TypeNode(t *types.Type) Ntype { + return TypeNodeAt(src.NoXPos, t) +} + +// TypeNodeAt is like TypeNode, but allows specifying the position +// information if a new OTYPE needs to be constructed. +// +// Deprecated: Use TypeNode instead. For typical use, the position for +// an anonymous OTYPE node should not matter. However, TypeNodeAt is +// available for use with toolstash -cmp to refactor existing code +// that is sensitive to OTYPE position. +func TypeNodeAt(pos src.XPos, t *types.Type) Ntype { if n := t.Obj(); n != nil { if n.Type() != t { base.Fatalf("type skew: %v has type %v, but expected %v", n, n.Type(), t) } return n.(Ntype) } - return newTypeNode(src.NoXPos, t) + return newTypeNode(pos, t) +} + +// A DynamicType represents the target type in a type switch. +type DynamicType struct { + miniExpr + X Node // a *runtime._type for the targeted type + ITab Node // for type switches from nonempty interfaces to non-interfaces, this is the itab for that pair. +} + +func NewDynamicType(pos src.XPos, x Node) *DynamicType { + n := &DynamicType{X: x} + n.pos = pos + n.op = ODYNAMICTYPE + return n } |