camoroso
8e596d5979
1. moved scan/symbol.go to new package sym and adapted all files that reference Symbol type and its values. 2. new type interval defined by begin, end and step values. 3. replaced operator-range.go with operator-interval.go. 4. replaced range operator begin:end with begin..end..step. 5. new implementation of sub-collection extraction based on new interval literal.
69 lines
1.1 KiB
Go
69 lines
1.1 KiB
Go
// Copyright (c) 2024-2026 Celestino Amoroso (celestino.amoroso@gmail.com).
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// All rights reserved.
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// interval.go
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package interval
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import (
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"fmt"
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"git.portale-stac.it/go-pkg/expr/kern"
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)
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const TypeName = "interval"
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type IntervalType struct {
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begin, end, step int64
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}
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func NewInterval(begin, end, step int64) *IntervalType {
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return &IntervalType{
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begin: begin,
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end: end,
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step: step,
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}
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}
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func (p *IntervalType) Begin() int64 {
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return p.begin
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}
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func (p *IntervalType) End() int64 {
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return p.end
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}
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func (p *IntervalType) Step() int64 {
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return p.step
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}
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func IsInterval(v any) (ok bool) {
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_, ok = v.(*IntervalType)
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return ok
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}
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func (p *IntervalType) TypeName() string {
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return TypeName
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}
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func (p *IntervalType) ToString(opt kern.FmtOpt) string {
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return fmt.Sprintf("%d..%d..%d", p.begin, p.end, p.step)
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}
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func (p *IntervalType) String() string {
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return p.ToString(0)
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}
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func (p *IntervalType) ToIntTriple() (b, e, s int) {
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b = int(p.begin)
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e = int(p.end)
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s = int(p.step)
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return
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}
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// func (b *bool) EqualTo(other kern.Equaler) (equal bool) {
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// if otherBool, ok := other.(*bool); ok {
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// equal = b == otherBool
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// }
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// return
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// }
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