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|
package objects
import (
"fmt"
)
// print(args...)
func builtinPrint(args ...Object) (Object, error) {
for _, arg := range args {
if str, ok := arg.(*String); ok {
fmt.Println(str.Value)
} else {
fmt.Println(arg.String())
}
}
return nil, nil
}
// printf("format", args...)
func builtinPrintf(args ...Object) (Object, error) {
numArgs := len(args)
if numArgs == 0 {
return nil, ErrWrongNumArguments
}
format, ok := args[0].(*String)
if !ok {
return nil, ErrInvalidArgumentType{
Name: "format",
Expected: "string",
Found: args[0].TypeName(),
}
}
if numArgs == 1 {
fmt.Print(format)
return nil, nil
}
formatArgs := make([]interface{}, numArgs-1, numArgs-1)
for idx, arg := range args[1:] {
formatArgs[idx] = objectToInterface(arg)
}
fmt.Printf(format.Value, formatArgs...)
return nil, nil
}
// sprintf("format", args...)
func builtinSprintf(args ...Object) (Object, error) {
numArgs := len(args)
if numArgs == 0 {
return nil, ErrWrongNumArguments
}
format, ok := args[0].(*String)
if !ok {
return nil, ErrInvalidArgumentType{
Name: "format",
Expected: "string",
Found: args[0].TypeName(),
}
}
if numArgs == 1 {
return format, nil // okay to return 'format' directly as String is immutable
}
formatArgs := make([]interface{}, numArgs-1, numArgs-1)
for idx, arg := range args[1:] {
formatArgs[idx] = objectToInterface(arg)
}
return &String{Value: fmt.Sprintf(format.Value, formatArgs...)}, nil
}
|
