go-pkg/expr
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moved scanner sources to package 'scan'

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This commit is contained in:
Celestino Amoroso
2026-05-03 14:19:17 +02:00
parent f63ff5953e
commit 7f34ccf955
66 changed files with 1793 additions and 1726 deletions
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operator-index.go
+18 -17
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@@ -6,16 +6,17 @@ package expr
import (
"git.portale-stac.it/go-pkg/expr/kern"
"git.portale-stac.it/go-pkg/expr/scan"
)
// -------- index term
func newIndexTerm(tk *Token) (inst *term) {
return &term{
tk: *tk,
children: make([]*term, 0, 2),
position: posInfix,
priority: priDot,
evalFunc: evalIndex,
func newIndexTerm(tk *scan.Token) (inst *scan.Term) {
return &scan.Term{
Tk: *tk,
Children: make([]*scan.Term, 0, 2),
Position: scan.PosInfix,
Priority: scan.PriDot,
EvalFunc: evalIndex,
}
}
@@ -24,7 +25,7 @@ func verifyKey(indexList *kern.ListType) (index any, err error) {
return
}
func verifyIndex(indexTerm *term, indexList *kern.ListType, maxValue int) (index int, err error) {
func verifyIndex(indexTerm *scan.Term, indexList *kern.ListType, maxValue int) (index int, err error) {
var v int
if v, err = kern.ToGoInt((*indexList)[0], "index expression"); err == nil {
@@ -40,7 +41,7 @@ func verifyIndex(indexTerm *term, indexList *kern.ListType, maxValue int) (index
return
}
func verifyRange(indexTerm *term, indexList *kern.ListType, maxValue int) (startIndex, endIndex int, err error) {
func verifyRange(indexTerm *scan.Term, indexList *kern.ListType, maxValue int) (startIndex, endIndex int, err error) {
v, _ := ((*indexList)[0]).(*intPair)
startIndex = v.a
endIndex = v.b
@@ -63,16 +64,16 @@ func verifyRange(indexTerm *term, indexList *kern.ListType, maxValue int) (start
return
}
func evalIndex(ctx kern.ExprContext, opTerm *term) (v any, err error) {
func evalIndex(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error) {
var leftValue, rightValue any
var indexList *kern.ListType
var ok bool
if leftValue, rightValue, err = opTerm.evalInfix(ctx); err != nil {
if leftValue, rightValue, err = opTerm.EvalInfix(ctx); err != nil {
return
}
indexTerm := opTerm.children[1]
indexTerm := opTerm.Children[1]
if indexList, ok = rightValue.(*kern.ListType); !ok {
err = opTerm.Errorf("invalid index expression")
return
@@ -96,7 +97,7 @@ func evalIndex(ctx kern.ExprContext, opTerm *term) (v any, err error) {
case *kern.DictType:
v, err = getDictItem(unboxedValue, indexTerm, indexList, rightValue)
default:
err = opTerm.errIncompatibleTypes(leftValue, rightValue)
err = opTerm.ErrIncompatibleTypes(leftValue, rightValue)
}
} else if isIntPair((*indexList)[0]) {
switch unboxedValue := leftValue.(type) {
@@ -112,19 +113,19 @@ func evalIndex(ctx kern.ExprContext, opTerm *term) (v any, err error) {
v = unboxedValue[start:end]
}
default:
err = opTerm.errIncompatibleTypes(leftValue, rightValue)
err = opTerm.ErrIncompatibleTypes(leftValue, rightValue)
}
} else if kern.IsDict(leftValue) {
d := leftValue.(*kern.DictType)
v, err = getDictItem(d, indexTerm, indexList, rightValue)
} else {
rightChild := opTerm.children[1]
rightChild := opTerm.Children[1]
err = rightChild.Errorf("invalid index type: %v", (*indexList)[0])
}
return
}
func getDictItem(d *kern.DictType, indexTerm *term, indexList *kern.ListType, rightValue any) (v any, err error) {
func getDictItem(d *kern.DictType, indexTerm *scan.Term, indexList *kern.ListType, rightValue any) (v any, err error) {
var ok bool
var indexValue any
@@ -138,5 +139,5 @@ func getDictItem(d *kern.DictType, indexTerm *term, indexList *kern.ListType, ri
// init
func init() {
registerTermConstructor(SymIndex, newIndexTerm)
scan.RegisterTermConstructor(scan.SymIndex, newIndexTerm)
}