Method setTextRange

internal/checker/nodebuilderimpl.go:1356–1388

** * Unlike the utilities `setTextRange`, this checks if the `location` we're trying to set on `range` is within the * same file as the active context. If not, the range is not applied. This prevents us from copying ranges across files, * which will confuse the node printer (as it assumes all node r

(range_ *ast.Node, location *ast.Node)

* It also calls `setOriginalNode` to setup a `.original` pointer, since you basically *always* want these in the node builder.
 */
func (b *NodeBuilderImpl) setTextRange(range_ *ast.Node, location *ast.Node) *ast.Node {
	if range_ == nil {
		return range_
	}
	if !ast.NodeIsSynthesized(range_) || (range_.Flags&ast.NodeFlagsSynthesized == 0) || b.ctx.enclosingFile == nil || b.ctx.enclosingFile != ast.GetSourceFileOfNode(b.e.MostOriginal(range_)) {
		original := range_
		range_ = range_.Clone(b.f) // if `range` is synthesized or originates in another file, copy it so it definitely has synthetic positions
		range_.Loc = core.NewTextRange(-1, -1)
		if symbol, ok := b.idToSymbol[original]; ok {
			b.idToSymbol[range_] = symbol
		}
	}
	if range_ == location || location == nil {
		return range_
	}
	// Don't overwrite the original node if `range` has an `original` node that points either directly or indirectly to `location`
	original := b.e.Original(range_)
	for original != nil && original != location {
		original = b.e.Original(original)
	}
	if original == nil {
		b.e.SetOriginalEx(range_, location, true)
	}

	// only set positions if range comes from the same file since copying text across files isn't supported by the emitter
	if b.ctx.enclosingFile != nil && b.ctx.enclosingFile == ast.GetSourceFileOfNode(b.e.MostOriginal(location)) {
		range_.Loc = location.Loc
		return range_
	} else {
		range_.Loc = core.NewTextRange(-1, -1)
	}
	return range_
}

func (b *NodeBuilderImpl) typeParameterShadowsOtherTypeParameterInScope(name string, typeParameter *Type) bool {
	result := b.ch.resolveName(b.ctx.enclosingDeclaration, name, ast.SymbolFlagsType, nil, false, false)