mirror of
https://github.com/go-sylixos/elvish.git
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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
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import (
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"errors"
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"regexp"
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"strconv"
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"strings"
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"src.elv.sh/pkg/eval/vals"
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"src.elv.sh/pkg/wcwidth"
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)
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// String operations.
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// ErrInputOfEawkMustBeString is thrown when eawk gets a non-string input.
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var ErrInputOfEawkMustBeString = errors.New("input of eawk must be string")
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// TODO(xiaq): Document -override-wcswidth.
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func init() {
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addBuiltinFns(map[string]any{
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"<s": func(a, b string) bool { return a < b },
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"<=s": func(a, b string) bool { return a <= b },
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"==s": func(a, b string) bool { return a == b },
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"!=s": func(a, b string) bool { return a != b },
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">s": func(a, b string) bool { return a > b },
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">=s": func(a, b string) bool { return a >= b },
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"to-string": toString,
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"base": base,
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"wcswidth": wcwidth.Of,
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"-override-wcwidth": wcwidth.Override,
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"eawk": eawk,
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})
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}
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func toString(fm *Frame, args ...any) error {
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out := fm.ValueOutput()
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for _, a := range args {
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err := out.Put(vals.ToString(a))
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if err != nil {
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return err
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}
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}
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return nil
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}
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// ErrBadBase is thrown by the "base" builtin if the base is smaller than 2 or
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// greater than 36.
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var ErrBadBase = errors.New("bad base")
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func base(fm *Frame, b int, nums ...int) error {
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if b < 2 || b > 36 {
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return ErrBadBase
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}
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out := fm.ValueOutput()
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for _, num := range nums {
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err := out.Put(strconv.FormatInt(int64(num), b))
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if err != nil {
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return err
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}
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}
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return nil
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}
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var eawkWordSep = regexp.MustCompile("[ \t]+")
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func eawk(fm *Frame, f Callable, inputs Inputs) error {
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broken := false
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var err error
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inputs(func(v any) {
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if broken {
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return
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}
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line, ok := v.(string)
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if !ok {
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broken = true
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err = ErrInputOfEawkMustBeString
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return
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}
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args := []any{line}
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for _, field := range eawkWordSep.Split(strings.Trim(line, " \t"), -1) {
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args = append(args, field)
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}
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newFm := fm.Fork("fn of eawk")
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// TODO: Close port 0 of newFm.
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ex := f.Call(newFm, args, NoOpts)
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newFm.Close()
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if ex != nil {
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switch Reason(ex) {
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case nil, Continue:
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// nop
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case Break:
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broken = true
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default:
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broken = true
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err = ex
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}
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}
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})
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return err
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}
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