go/src/cmd/compile/internal/noder/quirks.go

// typeExprEndPos returns the position that noder would leave base.Pos
// after parsing the given type expression.
//
// Deprecated: This function exists to emulate position semantics from
// Go 1.17, necessary for compatibility with the backend DWARF
// generation logic that assigns variables to their appropriate scope.
func typeExprEndPos(expr0 syntax.Expr) syntax.Pos { … }

func lastFieldType(fields []*syntax.Field) syntax.Expr { … }