go-pkg/expr
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several changes:

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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.
This commit is contained in:
Celestino Amoroso
2026-07-27 16:01:52 +02:00
parent 07aecfc4e7
commit 8e596d5979
63 changed files with 1125 additions and 755 deletions
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operator-pre-inc-dec.go
+5 -4
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@@ -7,6 +7,7 @@ package expr
import (
"git.portale-stac.it/go-pkg/expr/kern"
"git.portale-stac.it/go-pkg/expr/scan"
"git.portale-stac.it/go-pkg/expr/sym"
"git.portale-stac.it/go-pkg/expr/types"
)
@@ -28,7 +29,7 @@ func evalPreInc(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error) {
return
}
if types.IsInteger(childValue) && opTerm.Children[0].Symbol() == scan.SymVariable {
if types.IsInteger(childValue) && opTerm.Children[0].Symbol() == sym.SymVariable {
i := childValue.(int64) + 1
ctx.SetVar(opTerm.Children[0].Source(), i)
v = i
@@ -57,7 +58,7 @@ func evalPreDec(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error) {
return
}
if types.IsInteger(childValue) && opTerm.Children[0].Symbol() == scan.SymVariable {
if types.IsInteger(childValue) && opTerm.Children[0].Symbol() == sym.SymVariable {
i := childValue.(int64) - 1
ctx.SetVar(opTerm.Children[0].Source(), i)
v = i
@@ -69,6 +70,6 @@ func evalPreDec(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error) {
// init
func init() {
scan.RegisterTermConstructor(scan.SymPreInc, newPreIncTerm)
scan.RegisterTermConstructor(scan.SymPreDec, newPreDecTerm)
scan.RegisterTermConstructor(sym.SymPreInc, newPreIncTerm)
scan.RegisterTermConstructor(sym.SymPreDec, newPreDecTerm)
}