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-insert.go
+27 -26
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@@ -6,34 +6,35 @@ package expr
import (
"git.portale-stac.it/go-pkg/expr/kern"
"git.portale-stac.it/go-pkg/expr/scan"
)
//-------- prepend term
func newPrependTerm(tk *Token) (inst *term) {
return &term{
tk: *tk,
children: make([]*term, 0, 2),
position: posInfix,
priority: priInsert,
evalFunc: evalPrepend,
func newPrependTerm(tk *scan.Token) (inst *scan.Term) {
return &scan.Term{
Tk: *tk,
Children: make([]*scan.Term, 0, 2),
Position: scan.PosInfix,
Priority: scan.PriInsert,
EvalFunc: evalPrepend,
}
}
func newAppendTerm(tk *Token) (inst *term) {
return &term{
tk: *tk,
children: make([]*term, 0, 2),
position: posInfix,
priority: priInsert,
evalFunc: evalAppend,
func newAppendTerm(tk *scan.Token) (inst *scan.Term) {
return &scan.Term{
Tk: *tk,
Children: make([]*scan.Term, 0, 2),
Position: scan.PosInfix,
Priority: scan.PriInsert,
EvalFunc: evalAppend,
}
}
func evalPrepend(ctx kern.ExprContext, opTerm *term) (v any, err error) {
func evalPrepend(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
}
@@ -41,19 +42,19 @@ func evalPrepend(ctx kern.ExprContext, opTerm *term) (v any, err error) {
list, _ := rightValue.(*kern.ListType)
newList := append(kern.ListType{leftValue}, *list...)
v = &newList
if opTerm.children[1].symbol() == SymVariable {
ctx.UnsafeSetVar(opTerm.children[1].Source(), v)
if opTerm.Children[1].Symbol() == scan.SymVariable {
ctx.UnsafeSetVar(opTerm.Children[1].Source(), v)
}
} else {
err = opTerm.errIncompatibleTypes(leftValue, rightValue)
err = opTerm.ErrIncompatibleTypes(leftValue, rightValue)
}
return
}
func evalAppend(ctx kern.ExprContext, opTerm *term) (v any, err error) {
func evalAppend(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
}
@@ -61,11 +62,11 @@ func evalAppend(ctx kern.ExprContext, opTerm *term) (v any, err error) {
list, _ := leftValue.(*kern.ListType)
newList := append(*list, rightValue)
v = &newList
if opTerm.children[0].symbol() == SymVariable {
ctx.UnsafeSetVar(opTerm.children[0].Source(), v)
if opTerm.Children[0].Symbol() == scan.SymVariable {
ctx.UnsafeSetVar(opTerm.Children[0].Source(), v)
}
} else {
err = opTerm.errIncompatibleTypes(leftValue, rightValue)
err = opTerm.ErrIncompatibleTypes(leftValue, rightValue)
}
return
}
@@ -90,6 +91,6 @@ func evalAppend(ctx kern.ExprContext, opTerm *term) (v any, err error) {
// init
func init() {
registerTermConstructor(SymPlusGreater, newPrependTerm)
registerTermConstructor(SymLessPlus, newAppendTerm)
scan.RegisterTermConstructor(scan.SymPlusGreater, newPrependTerm)
scan.RegisterTermConstructor(scan.SymLessPlus, newAppendTerm)
}