mirror of
https://github.com/go-sylixos/elvish.git
synced 2024-12-05 03:17:50 +08:00
a3f4384495
The elvdocs still use the old format (#elvdoc:fn or #elvdoc:var) for now, but will be changed to "fn" and "var" forms soon. Also remove the accidentally committed cmd/mvelvdoc. It has been used to perform the conversion automatically but is not supposed to be committed.
109 lines
2.1 KiB
Go
109 lines
2.1 KiB
Go
package eval
|
|
|
|
import (
|
|
"errors"
|
|
"regexp"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"src.elv.sh/pkg/eval/vals"
|
|
"src.elv.sh/pkg/wcwidth"
|
|
)
|
|
|
|
// String operations.
|
|
|
|
// ErrInputOfEawkMustBeString is thrown when eawk gets a non-string input.
|
|
var ErrInputOfEawkMustBeString = errors.New("input of eawk must be string")
|
|
|
|
// TODO(xiaq): Document -override-wcswidth.
|
|
|
|
func init() {
|
|
addBuiltinFns(map[string]any{
|
|
"<s": func(a, b string) bool { return a < b },
|
|
"<=s": func(a, b string) bool { return a <= b },
|
|
"==s": func(a, b string) bool { return a == b },
|
|
"!=s": func(a, b string) bool { return a != b },
|
|
">s": func(a, b string) bool { return a > b },
|
|
">=s": func(a, b string) bool { return a >= b },
|
|
|
|
"to-string": toString,
|
|
|
|
"base": base,
|
|
|
|
"wcswidth": wcwidth.Of,
|
|
"-override-wcwidth": wcwidth.Override,
|
|
|
|
"eawk": eawk,
|
|
})
|
|
}
|
|
|
|
func toString(fm *Frame, args ...any) error {
|
|
out := fm.ValueOutput()
|
|
for _, a := range args {
|
|
err := out.Put(vals.ToString(a))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// ErrBadBase is thrown by the "base" builtin if the base is smaller than 2 or
|
|
// greater than 36.
|
|
var ErrBadBase = errors.New("bad base")
|
|
|
|
func base(fm *Frame, b int, nums ...int) error {
|
|
if b < 2 || b > 36 {
|
|
return ErrBadBase
|
|
}
|
|
|
|
out := fm.ValueOutput()
|
|
for _, num := range nums {
|
|
err := out.Put(strconv.FormatInt(int64(num), b))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
var eawkWordSep = regexp.MustCompile("[ \t]+")
|
|
|
|
func eawk(fm *Frame, f Callable, inputs Inputs) error {
|
|
broken := false
|
|
var err error
|
|
inputs(func(v any) {
|
|
if broken {
|
|
return
|
|
}
|
|
line, ok := v.(string)
|
|
if !ok {
|
|
broken = true
|
|
err = ErrInputOfEawkMustBeString
|
|
return
|
|
}
|
|
args := []any{line}
|
|
for _, field := range eawkWordSep.Split(strings.Trim(line, " \t"), -1) {
|
|
args = append(args, field)
|
|
}
|
|
|
|
newFm := fm.Fork("fn of eawk")
|
|
// TODO: Close port 0 of newFm.
|
|
ex := f.Call(newFm, args, NoOpts)
|
|
newFm.Close()
|
|
|
|
if ex != nil {
|
|
switch Reason(ex) {
|
|
case nil, Continue:
|
|
// nop
|
|
case Break:
|
|
broken = true
|
|
default:
|
|
broken = true
|
|
err = ex
|
|
}
|
|
}
|
|
})
|
|
return err
|
|
}
|