29 lines
533 B
Go
29 lines
533 B
Go
package builtins
|
|
|
|
import "monkey/object"
|
|
|
|
import (
|
|
"os"
|
|
)
|
|
|
|
// Read ...
|
|
func Read(args ...object.Object) object.Object {
|
|
if len(args) != 1 {
|
|
return newError("wrong number of arguments. got=%d, want=1",
|
|
len(args))
|
|
}
|
|
|
|
arg, ok := args[0].(*object.String)
|
|
if !ok {
|
|
return newError("argument to `read` expected to be `str` got=%T", args[0].Type())
|
|
}
|
|
|
|
filename := arg.Value
|
|
data, err := os.ReadFile(filename)
|
|
if err != nil {
|
|
return newError("error reading file: %s", err)
|
|
}
|
|
|
|
return &object.String{Value: string(data)}
|
|
}
|