go-pkg/expr
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moved a subset of source file to the kern package

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This commit is contained in:
Celestino Amoroso
2026-04-27 19:43:37 +02:00
parent f100adead3
commit 4d910dd069
107 changed files with 2080 additions and 1380 deletions
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operator-index.go
+20 -16
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@@ -4,6 +4,10 @@
// operator-index.go
package expr
import (
"git.portale-stac.it/go-pkg/expr/kern"
)
// -------- index term
func newIndexTerm(tk *Token) (inst *term) {
return &term{
@@ -15,15 +19,15 @@ func newIndexTerm(tk *Token) (inst *term) {
}
}
func verifyKey(indexList *ListType) (index any, err error) {
func verifyKey(indexList *kern.ListType) (index any, err error) {
index = (*indexList)[0]
return
}
func verifyIndex(indexTerm *term, indexList *ListType, maxValue int) (index int, err error) {
func verifyIndex(indexTerm *term, indexList *kern.ListType, maxValue int) (index int, err error) {
var v int
if v, err = ToGoInt((*indexList)[0], "index expression"); err == nil {
if v, err = kern.ToGoInt((*indexList)[0], "index expression"); err == nil {
if v < 0 && v >= -maxValue {
v = maxValue + v
}
@@ -36,11 +40,11 @@ func verifyIndex(indexTerm *term, indexList *ListType, maxValue int) (index int,
return
}
func verifyRange(indexTerm *term, indexList *ListType, maxValue int) (startIndex, endIndex int, err error) {
func verifyRange(indexTerm *term, indexList *kern.ListType, maxValue int) (startIndex, endIndex int, err error) {
v, _ := ((*indexList)[0]).(*intPair)
startIndex = v.a
endIndex = v.b
if endIndex == ConstLastIndex {
if endIndex == kern.ConstLastIndex {
endIndex = maxValue
}
if startIndex < 0 && startIndex >= -maxValue {
@@ -59,9 +63,9 @@ func verifyRange(indexTerm *term, indexList *ListType, maxValue int) (startIndex
return
}
func evalIndex(ctx ExprContext, opTerm *term) (v any, err error) {
func evalIndex(ctx kern.ExprContext, opTerm *term) (v any, err error) {
var leftValue, rightValue any
var indexList *ListType
var indexList *kern.ListType
var ok bool
if leftValue, rightValue, err = opTerm.evalInfix(ctx); err != nil {
@@ -69,7 +73,7 @@ func evalIndex(ctx ExprContext, opTerm *term) (v any, err error) {
}
indexTerm := opTerm.children[1]
if indexList, ok = rightValue.(*ListType); !ok {
if indexList, ok = rightValue.(*kern.ListType); !ok {
err = opTerm.Errorf("invalid index expression")
return
} else if len(*indexList) != 1 {
@@ -77,9 +81,9 @@ func evalIndex(ctx ExprContext, opTerm *term) (v any, err error) {
return
}
if IsInteger((*indexList)[0]) {
if kern.IsInteger((*indexList)[0]) {
switch unboxedValue := leftValue.(type) {
case *ListType:
case *kern.ListType:
var index int
if index, err = verifyIndex(indexTerm, indexList, len(*unboxedValue)); err == nil {
v = (*unboxedValue)[index]
@@ -89,17 +93,17 @@ func evalIndex(ctx ExprContext, opTerm *term) (v any, err error) {
if index, err = verifyIndex(indexTerm, indexList, len(unboxedValue)); err == nil {
v = string(unboxedValue[index])
}
case *DictType:
case *kern.DictType:
v, err = getDictItem(unboxedValue, indexTerm, indexList, rightValue)
default:
err = opTerm.errIncompatibleTypes(leftValue, rightValue)
}
} else if isIntPair((*indexList)[0]) {
switch unboxedValue := leftValue.(type) {
case *ListType:
case *kern.ListType:
var start, end int
if start, end, err = verifyRange(indexTerm, indexList, len(*unboxedValue)); err == nil {
sublist := ListType((*unboxedValue)[start:end])
sublist := kern.ListType((*unboxedValue)[start:end])
v = &sublist
}
case string:
@@ -110,8 +114,8 @@ func evalIndex(ctx ExprContext, opTerm *term) (v any, err error) {
default:
err = opTerm.errIncompatibleTypes(leftValue, rightValue)
}
} else if IsDict(leftValue) {
d := leftValue.(*DictType)
} else if kern.IsDict(leftValue) {
d := leftValue.(*kern.DictType)
v, err = getDictItem(d, indexTerm, indexList, rightValue)
} else {
rightChild := opTerm.children[1]
@@ -120,7 +124,7 @@ func evalIndex(ctx ExprContext, opTerm *term) (v any, err error) {
return
}
func getDictItem(d *DictType, indexTerm *term, indexList *ListType, rightValue any) (v any, err error) {
func getDictItem(d *kern.DictType, indexTerm *term, indexList *kern.ListType, rightValue any) (v any, err error) {
var ok bool
var indexValue any