99 lines
1.9 KiB
Go
99 lines
1.9 KiB
Go
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package versions
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import (
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"fmt"
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)
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type setBound struct {
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v Version
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op setBoundOp
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}
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func (s setBound) Has(v Version) bool {
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switch s.op {
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case setBoundGT:
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return v.GreaterThan(s.v)
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case setBoundGTE:
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return v.GreaterThan(s.v) || v.Same(s.v)
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case setBoundLT:
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return v.LessThan(s.v)
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case setBoundLTE:
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return v.LessThan(s.v) || v.Same(s.v)
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default:
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// Should never happen because the above is exhaustive
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panic("invalid setBound operator")
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}
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}
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func (s setBound) AllRequested() Set {
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// Inequalities request nothing.
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return None
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}
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func (s setBound) GoString() string {
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switch s.op {
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case setBoundGT:
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return fmt.Sprintf("versions.NewerThan(%#v)", s.v)
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case setBoundGTE:
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return fmt.Sprintf("versions.AtLeast(%#v)", s.v)
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case setBoundLT:
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return fmt.Sprintf("versions.OlderThan(%#v)", s.v)
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case setBoundLTE:
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return fmt.Sprintf("versions.AtMost(%#v)", s.v)
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default:
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// Should never happen because the above is exhaustive
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return fmt.Sprintf("versions.Set{versions.setBound{v:%#v,op:%#v}}", s.v, s.op)
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}
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}
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// NewerThan returns a set containing all versions greater than the given
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// version, non-inclusive.
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func NewerThan(v Version) Set {
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return Set{
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setI: setBound{
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v: v,
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op: setBoundGT,
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},
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}
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}
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// OlderThan returns a set containing all versions lower than the given
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// version, non-inclusive.
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func OlderThan(v Version) Set {
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return Set{
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setI: setBound{
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v: v,
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op: setBoundLT,
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},
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}
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}
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// AtLeast returns a set containing all versions greater than or equal to
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// the given version.
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func AtLeast(v Version) Set {
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return Set{
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setI: setBound{
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v: v,
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op: setBoundGTE,
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},
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}
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}
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// AtMost returns a set containing all versions less than or equal to the given
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// version, non-inclusive.
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func AtMost(v Version) Set {
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return Set{
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setI: setBound{
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v: v,
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op: setBoundLTE,
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},
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}
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}
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type setBoundOp rune
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const setBoundGT = '>'
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const setBoundGTE = '≥'
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const setBoundLT = '<'
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const setBoundLTE = '≤'
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