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-post-inc-dec.go
+29 -30
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@@ -6,24 +6,24 @@ package expr
import (
"git.portale-stac.it/go-pkg/expr/kern"
"git.portale-stac.it/go-pkg/expr/scan"
)
// -------- post increment term
func newPostIncTerm(tk *Token) *term {
return &term{
tk: *tk,
parent: nil,
children: make([]*term, 0, 1),
position: posPostfix,
priority: priIncDec,
evalFunc: evalPostInc,
func newPostIncTerm(tk *scan.Token) *scan.Term {
return &scan.Term{
Tk: *tk,
Children: make([]*scan.Term, 0, 1),
Position: scan.PosPostfix,
Priority: scan.PriIncDec,
EvalFunc: evalPostInc,
}
}
func evalPostInc(ctx kern.ExprContext, opTerm *term) (v any, err error) {
func evalPostInc(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error) {
var childValue any
if childValue, err = opTerm.evalPrefix(ctx); err != nil {
if childValue, err = opTerm.EvalPrefix(ctx); err != nil {
return
}
@@ -31,8 +31,8 @@ func evalPostInc(ctx kern.ExprContext, opTerm *term) (v any, err error) {
var namePrefix string
v, err = it.Next()
if opTerm.children[0].symbol() == SymVariable {
namePrefix = opTerm.children[0].Source()
if opTerm.Children[0].Symbol() == scan.SymVariable {
namePrefix = opTerm.Children[0].Source()
}
ctx.UnsafeSetVar(namePrefix+"_index", it.Index())
if c, err1 := it.Current(); err1 == nil {
@@ -49,49 +49,48 @@ func evalPostInc(ctx kern.ExprContext, opTerm *term) (v any, err error) {
ctx.UnsafeSetVar(namePrefix+"_value", v1)
}
}
} else if kern.IsInteger(childValue) && opTerm.children[0].symbol() == SymVariable {
} else if kern.IsInteger(childValue) && opTerm.Children[0].Symbol() == scan.SymVariable {
v = childValue
i, _ := childValue.(int64)
ctx.SetVar(opTerm.children[0].Source(), i+1)
ctx.SetVar(opTerm.Children[0].Source(), i+1)
} else {
err = opTerm.errIncompatiblePrefixPostfixType(childValue)
err = opTerm.ErrIncompatiblePrefixPostfixType(childValue)
}
return
}
// -------- post decrement term
func newPostDecTerm(tk *Token) *term {
return &term{
tk: *tk,
parent: nil,
children: make([]*term, 0, 1),
position: posPostfix,
priority: priIncDec,
evalFunc: evalPostDec,
func newPostDecTerm(tk *scan.Token) *scan.Term {
return &scan.Term{
Tk: *tk,
Children: make([]*scan.Term, 0, 1),
Position: scan.PosPostfix,
Priority: scan.PriIncDec,
EvalFunc: evalPostDec,
}
}
func evalPostDec(ctx kern.ExprContext, opTerm *term) (v any, err error) {
func evalPostDec(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error) {
var childValue any
if childValue, err = opTerm.evalPrefix(ctx); err != nil {
if childValue, err = opTerm.EvalPrefix(ctx); err != nil {
return
}
/* if it, ok := childValue.(Iterator); ok {
v, err = it.Next()
} else */if kern.IsInteger(childValue) && opTerm.children[0].symbol() == SymVariable {
} else */if kern.IsInteger(childValue) && opTerm.Children[0].Symbol() == scan.SymVariable {
v = childValue
i, _ := childValue.(int64)
ctx.SetVar(opTerm.children[0].Source(), i-1)
ctx.SetVar(opTerm.Children[0].Source(), i-1)
} else {
err = opTerm.errIncompatiblePrefixPostfixType(childValue)
err = opTerm.ErrIncompatiblePrefixPostfixType(childValue)
}
return
}
// init
func init() {
registerTermConstructor(SymDoublePlus, newPostIncTerm)
registerTermConstructor(SymDoubleMinus, newPostDecTerm)
scan.RegisterTermConstructor(scan.SymDoublePlus, newPostIncTerm)
scan.RegisterTermConstructor(scan.SymDoubleMinus, newPostDecTerm)
}