xgo/objects/builtin_append.go
Daniel 3500c686b3
Improvements on compiler/VM error reporting (filename:line:col)
- add type infos to VM error messages
- add 'Name' to UserFunction objects 
- add 'expectErrorString' to VM tests
- replace vm.expectError() with vm.expectErrorString() to make it more explicit
- add source map info to VM error messages
- optimization in function calls
- add file/line/col info to compiler errors
- change stdlib module to be loaded from VM (instead of compiler) so they can be properly loaded after the source is compiled into binary
- VM can take builtin modules optionally
2019-02-20 16:26:11 -08:00

21 lines
473 B
Go

package objects
// append(arr, items...)
func builtinAppend(args ...Object) (Object, error) {
if len(args) < 2 {
return nil, ErrWrongNumArguments
}
switch arg := args[0].(type) {
case *Array:
return &Array{Value: append(arg.Value, args[1:]...)}, nil
case *ImmutableArray:
return &Array{Value: append(arg.Value, args[1:]...)}, nil
default:
return nil, ErrInvalidArgumentType{
Name: "first",
Expected: "array",
Found: arg.TypeName(),
}
}
}