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-shift.go
+25 -24
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@@ -6,35 +6,36 @@ package expr
import (
"git.portale-stac.it/go-pkg/expr/kern"
"git.portale-stac.it/go-pkg/expr/scan"
)
//-------- bit right shift term
func newRightShiftTerm(tk *Token) (inst *term) {
return &term{
tk: *tk,
children: make([]*term, 0, 2),
position: posInfix,
priority: priBinShift,
evalFunc: evalRightShift,
func newRightShiftTerm(tk *scan.Token) (inst *scan.Term) {
return &scan.Term{
Tk: *tk,
Children: make([]*scan.Term, 0, 2),
Position: scan.PosInfix,
Priority: scan.PriBinShift,
EvalFunc: evalRightShift,
}
}
func bitRightShift(opTerm *term, leftValue, rightValue any) (v any, err error) {
func bitRightShift(opTerm *scan.Term, leftValue, rightValue any) (v any, err error) {
if kern.IsInteger(leftValue) && kern.IsInteger(rightValue) {
leftInt := leftValue.(int64)
rightInt := rightValue.(int64)
v = leftInt >> rightInt
} else {
err = opTerm.errIncompatibleTypes(leftValue, rightValue)
err = opTerm.ErrIncompatibleTypes(leftValue, rightValue)
}
return
}
func evalRightShift(ctx kern.ExprContext, opTerm *term) (v any, err error) {
func evalRightShift(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error) {
var leftValue, rightValue any
if leftValue, rightValue, err = opTerm.evalInfix(ctx); err != nil {
if leftValue, rightValue, err = opTerm.EvalInfix(ctx); err != nil {
return
}
@@ -42,31 +43,31 @@ func evalRightShift(ctx kern.ExprContext, opTerm *term) (v any, err error) {
return
}
func newLeftShiftTerm(tk *Token) (inst *term) {
return &term{
tk: *tk,
children: make([]*term, 0, 2),
position: posInfix,
priority: priBinShift,
evalFunc: evalLeftShift,
func newLeftShiftTerm(tk *scan.Token) (inst *scan.Term) {
return &scan.Term{
Tk: *tk,
Children: make([]*scan.Term, 0, 2),
Position: scan.PosInfix,
Priority: scan.PriBinShift,
EvalFunc: evalLeftShift,
}
}
func bitLeftShift(opTerm *term, leftValue, rightValue any) (v any, err error) {
func bitLeftShift(opTerm *scan.Term, leftValue, rightValue any) (v any, err error) {
if kern.IsInteger(leftValue) && kern.IsInteger(rightValue) {
leftInt := leftValue.(int64)
rightInt := rightValue.(int64)
v = leftInt << rightInt
} else {
err = opTerm.errIncompatibleTypes(leftValue, rightValue)
err = opTerm.ErrIncompatibleTypes(leftValue, rightValue)
}
return
}
func evalLeftShift(ctx kern.ExprContext, opTerm *term) (v any, err error) {
func evalLeftShift(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error) {
var leftValue, rightValue any
if leftValue, rightValue, err = opTerm.evalInfix(ctx); err != nil {
if leftValue, rightValue, err = opTerm.EvalInfix(ctx); err != nil {
return
}
@@ -76,6 +77,6 @@ func evalLeftShift(ctx kern.ExprContext, opTerm *term) (v any, err error) {
// init
func init() {
registerTermConstructor(SymDoubleGreater, newRightShiftTerm)
registerTermConstructor(SymDoubleLess, newLeftShiftTerm)
scan.RegisterTermConstructor(scan.SymDoubleGreater, newRightShiftTerm)
scan.RegisterTermConstructor(scan.SymDoubleLess, newLeftShiftTerm)
}