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-prod.go
+53 -52
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@@ -8,21 +8,22 @@ import (
"strings"
"git.portale-stac.it/go-pkg/expr/kern"
"git.portale-stac.it/go-pkg/expr/scan"
)
//-------- multiply term
func newMultiplyTerm(tk *Token) (inst *term) {
return &term{
tk: *tk,
children: make([]*term, 0, 2),
position: posInfix,
priority: priProduct,
evalFunc: evalMultiply,
func newMultiplyTerm(tk *scan.Token) (inst *scan.Term) {
return &scan.Term{
Tk: *tk,
Children: make([]*scan.Term, 0, 2),
Position: scan.PosInfix,
Priority: scan.PriProduct,
EvalFunc: evalMultiply,
}
}
func mulValues(opTerm *term, leftValue, rightValue any) (v any, err error) {
func mulValues(opTerm *scan.Term, leftValue, rightValue any) (v any, err error) {
if kern.IsString(leftValue) && kern.IsInteger(rightValue) {
s, _ := leftValue.(string)
n, _ := rightValue.(int64)
@@ -38,15 +39,15 @@ func mulValues(opTerm *term, leftValue, rightValue any) (v any, err error) {
v = leftInt * rightInt
}
} else {
err = opTerm.errIncompatibleTypes(leftValue, rightValue)
err = opTerm.ErrIncompatibleTypes(leftValue, rightValue)
}
return
}
func evalMultiply(ctx kern.ExprContext, prodTerm *term) (v any, err error) {
func evalMultiply(ctx kern.ExprContext, prodTerm *scan.Term) (v any, err error) {
var leftValue, rightValue any
if leftValue, rightValue, err = prodTerm.evalInfix(ctx); err != nil {
if leftValue, rightValue, err = prodTerm.EvalInfix(ctx); err != nil {
return
}
@@ -55,22 +56,22 @@ func evalMultiply(ctx kern.ExprContext, prodTerm *term) (v any, err error) {
//-------- divide term
func newDivideTerm(tk *Token) (inst *term) {
return &term{
tk: *tk,
children: make([]*term, 0, 2),
position: posInfix,
priority: priProduct,
evalFunc: evalDivide,
func newDivideTerm(tk *scan.Token) (inst *scan.Term) {
return &scan.Term{
Tk: *tk,
Children: make([]*scan.Term, 0, 2),
Position: scan.PosInfix,
Priority: scan.PriProduct,
EvalFunc: evalDivide,
}
}
func divValues(opTerm *term, leftValue, rightValue any) (v any, err error) {
func divValues(opTerm *scan.Term, leftValue, rightValue any) (v any, err error) {
if kern.IsNumOrFract(leftValue) && kern.IsNumOrFract(rightValue) {
if kern.IsFloat(leftValue) || kern.IsFloat(rightValue) {
d := kern.NumAsFloat(rightValue)
if d == 0.0 {
err = opTerm.errDivisionByZero()
err = opTerm.ErrDivisionByZero()
} else {
v = kern.NumAsFloat(leftValue) / d
}
@@ -79,7 +80,7 @@ func divValues(opTerm *term, leftValue, rightValue any) (v any, err error) {
} else {
leftInt, _ := leftValue.(int64)
if rightInt, _ := rightValue.(int64); rightInt == 0 {
err = opTerm.errDivisionByZero()
err = opTerm.ErrDivisionByZero()
} else {
v = leftInt / rightInt
}
@@ -92,7 +93,7 @@ func divValues(opTerm *term, leftValue, rightValue any) (v any, err error) {
source := leftValue.(string)
partSize := int(rightValue.(int64))
if partSize == 0 {
err = opTerm.errDivisionByZero()
err = opTerm.ErrDivisionByZero()
} else {
partCount := len(source) / partSize
remainder := len(source) % partSize
@@ -110,15 +111,15 @@ func divValues(opTerm *term, leftValue, rightValue any) (v any, err error) {
v = kern.NewList(parts)
}
} else {
err = opTerm.errIncompatibleTypes(leftValue, rightValue)
err = opTerm.ErrIncompatibleTypes(leftValue, rightValue)
}
return
}
func evalDivide(ctx kern.ExprContext, opTerm *term) (v any, err error) {
func evalDivide(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
}
@@ -127,66 +128,66 @@ func evalDivide(ctx kern.ExprContext, opTerm *term) (v any, err error) {
//-------- divide as float term
func newDivideAsFloatTerm(tk *Token) (inst *term) {
return &term{
tk: *tk,
children: make([]*term, 0, 2),
position: posInfix,
priority: priProduct,
evalFunc: evalDivideAsFloat,
func newDivideAsFloatTerm(tk *scan.Token) (inst *scan.Term) {
return &scan.Term{
Tk: *tk,
Children: make([]*scan.Term, 0, 2),
Position: scan.PosInfix,
Priority: scan.PriProduct,
EvalFunc: evalDivideAsFloat,
}
}
func evalDivideAsFloat(ctx kern.ExprContext, floatDivTerm *term) (v any, err error) {
func evalDivideAsFloat(ctx kern.ExprContext, floatDivTerm *scan.Term) (v any, err error) {
var leftValue, rightValue any
if leftValue, rightValue, err = floatDivTerm.evalInfix(ctx); err != nil {
if leftValue, rightValue, err = floatDivTerm.EvalInfix(ctx); err != nil {
return
}
if kern.IsNumOrFract(leftValue) && kern.IsNumOrFract(rightValue) {
d := kern.NumAsFloat(rightValue)
if d == 0.0 {
err = floatDivTerm.errDivisionByZero()
err = floatDivTerm.ErrDivisionByZero()
} else {
v = kern.NumAsFloat(leftValue) / d
}
} else {
err = floatDivTerm.errIncompatibleTypes(leftValue, rightValue)
err = floatDivTerm.ErrIncompatibleTypes(leftValue, rightValue)
}
return
}
//-------- reminder term
func newRemainderTerm(tk *Token) (inst *term) {
return &term{
tk: *tk,
children: make([]*term, 0, 2),
position: posInfix,
priority: priProduct,
evalFunc: evalRemainder,
func newRemainderTerm(tk *scan.Token) (inst *scan.Term) {
return &scan.Term{
Tk: *tk,
Children: make([]*scan.Term, 0, 2),
Position: scan.PosInfix,
Priority: scan.PriProduct,
EvalFunc: evalRemainder,
}
}
func remainderValues(opTerm *term, leftValue, rightValue any) (v any, err error) {
func remainderValues(opTerm *scan.Term, leftValue, rightValue any) (v any, err error) {
if kern.IsInteger(leftValue) && kern.IsInteger(rightValue) {
rightInt, _ := rightValue.(int64)
if rightInt == 0 {
err = opTerm.errDivisionByZero()
err = opTerm.ErrDivisionByZero()
} else {
leftInt, _ := leftValue.(int64)
v = leftInt % rightInt
}
} else {
err = opTerm.errIncompatibleTypes(leftValue, rightValue)
err = opTerm.ErrIncompatibleTypes(leftValue, rightValue)
}
return
}
func evalRemainder(ctx kern.ExprContext, remainderTerm *term) (v any, err error) {
func evalRemainder(ctx kern.ExprContext, remainderTerm *scan.Term) (v any, err error) {
var leftValue, rightValue any
if leftValue, rightValue, err = remainderTerm.evalInfix(ctx); err != nil {
if leftValue, rightValue, err = remainderTerm.EvalInfix(ctx); err != nil {
return
}
@@ -195,8 +196,8 @@ func evalRemainder(ctx kern.ExprContext, remainderTerm *term) (v any, err error)
// init
func init() {
registerTermConstructor(SymStar, newMultiplyTerm)
registerTermConstructor(SymSlash, newDivideTerm)
registerTermConstructor(SymDotSlash, newDivideAsFloatTerm)
registerTermConstructor(SymPercent, newRemainderTerm)
scan.RegisterTermConstructor(scan.SymStar, newMultiplyTerm)
scan.RegisterTermConstructor(scan.SymSlash, newDivideTerm)
scan.RegisterTermConstructor(scan.SymDotSlash, newDivideAsFloatTerm)
scan.RegisterTermConstructor(scan.SymPercent, newRemainderTerm)
}