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-post-inc-dec.go
+6 -5
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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"
)
@@ -32,7 +33,7 @@ func evalPostInc(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error) {
var namePrefix string
v, err = it.Next()
if opTerm.Children[0].Symbol() == scan.SymVariable {
if opTerm.Children[0].Symbol() == sym.SymVariable {
namePrefix = opTerm.Children[0].Source()
}
ctx.UnsafeSetVar(namePrefix+"_index", it.Index())
@@ -50,7 +51,7 @@ func evalPostInc(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error) {
ctx.UnsafeSetVar(namePrefix+"_value", v1)
}
}
} else if types.IsInteger(childValue) && opTerm.Children[0].Symbol() == scan.SymVariable {
} else if types.IsInteger(childValue) && opTerm.Children[0].Symbol() == sym.SymVariable {
v = childValue
i, _ := childValue.(int64)
ctx.SetVar(opTerm.Children[0].Source(), i+1)
@@ -80,7 +81,7 @@ func evalPostDec(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error) {
/* if it, ok := childValue.(Iterator); ok {
v, err = it.Next()
} else */if types.IsInteger(childValue) && opTerm.Children[0].Symbol() == scan.SymVariable {
} else */if types.IsInteger(childValue) && opTerm.Children[0].Symbol() == sym.SymVariable {
v = childValue
i, _ := childValue.(int64)
ctx.SetVar(opTerm.Children[0].Source(), i-1)
@@ -92,6 +93,6 @@ func evalPostDec(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error) {
// init
func init() {
scan.RegisterTermConstructor(scan.SymDoublePlus, newPostIncTerm)
scan.RegisterTermConstructor(scan.SymDoubleMinus, newPostDecTerm)
scan.RegisterTermConstructor(sym.SymDoublePlus, newPostIncTerm)
scan.RegisterTermConstructor(sym.SymDoubleMinus, newPostDecTerm)
}