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Load whatever is well-formed and means one thing: ignore a part with no effect, print a constant sample, render any JSON value, draw no weight-0 item, and let a name, a rows file, a struct or a CLI flag go unused

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Lilleman auf Larv
2026-10-07 23:39:59 +02:00
committed by Lillem4n
parent 052a52fc7a
commit ee236d7955
14 changed files with 165 additions and 213 deletions
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internal/builtinfunc/layout.go
+6 -45
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@@ -11,32 +11,12 @@ import (
const dayLayout = "2006-01-02"
// The instants a layout is proved against: layoutProbe2 is alike in no field, while
// layoutDay differs from layoutProbe in its date fields alone and layoutClock in its
// clock fields alone, so formatting two of them tells which kind a layout names.
var (
layoutProbe = time.Date(2001, 2, 3, 4, 5, 6, 0, time.UTC)
layoutProbe2 = time.Date(2010, 11, 12, 13, 14, 15, 0, time.UTC)
layoutDay = time.Date(2010, 11, 12, 4, 5, 6, 0, time.UTC)
layoutClock = time.Date(2001, 2, 3, 13, 14, 15, 0, time.UTC)
)
func namesAField(layout string) bool {
return layoutProbe.Format(layout) != layoutProbe2.Format(layout)
}
func namesADateField(layout string) bool {
return layoutProbe.Format(layout) != layoutDay.Format(layout)
}
func namesAClockField(layout string) bool {
return layoutProbe.Format(layout) != layoutClock.Format(layout)
}
// quotedLayout reports whether an arg carries the single quotes a layout is written in.
func quotedLayout(a string) bool {
return len(a) >= 2 && a[0] == '\'' && a[len(a)-1] == '\''
}
// layoutArg is the Go layout a quoted arg holds, refused when unquoted or constant.
// layoutArg is the Go layout a quoted arg holds, refused when unquoted.
// docs/decisions.md#a-layout-is-always-quoted
func layoutArg(a string) (string, error) {
if !quotedLayout(a) {
@@ -46,11 +26,7 @@ func layoutArg(a string) (string, error) {
}
return "", fmt.Errorf("layout %s is not quoted; write '%s'", a, bare)
}
layout := a[1 : len(a)-1]
if !namesAField(layout) {
return "", fmt.Errorf("layout '%s' names no field, so it is the constant %q; write it as text", layout, layout)
}
return layout, nil
return a[1 : len(a)-1], nil
}
// layoutOf is layoutArg for an arg a check already validated.
@@ -100,30 +76,15 @@ func dateArgs(a []string) error {
if to.Before(from) {
return fmt.Errorf("date(from,to,layout): from %s is after to %s", a[0], a[1])
}
layout, err := layoutArg(a[2])
if err != nil {
return err
}
if !namesADateField(layout) {
return fmt.Errorf("date(from,to,layout): '%s' names no date field; write time('%s')", layout, layout)
}
if from.Equal(to) && !namesAClockField(layout) {
return fmt.Errorf("date(%s,%s,'%s') is the constant %q; write it as text", a[0], a[1], layout, from.Format(layout))
}
return nil
_, err = layoutArg(a[2])
return err
}
func timeArg(a []string) error {
if err := layoutArity("time", 1, a); err != nil {
return err
}
layout, err := layoutArg(a[0])
if err != nil {
return err
}
if namesADateField(layout) {
return fmt.Errorf("time(layout): '%s' names a date field; write date(from,to,layout)", layout)
}
return nil
_, err := layoutArg(a[0])
return err
}
// datePrep draws a second in [from 00:00:00, to 23:59:59] UTC; the span is counted