42 lines
898 B
Go
42 lines
898 B
Go
|
// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
|
||
|
|
// All rights reserved.
|
||
|
|
|
||
|
|
// operator-post-inc.go
|
||
|
|
package expr
|
||
|
|
|
||
|
|
// -------- post increment term
|
||
|
|
|
||
|
|
func newPostIncTerm(tk *Token) *term {
|
||
|
|
return &term{
|
||
|
|
tk: *tk,
|
||
|
|
parent: nil,
|
||
|
|
children: make([]*term, 0, 1),
|
||
|
|
position: posPostfix,
|
||
|
|
priority: priPrePost,
|
||
|
|
evalFunc: evalPostInc,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func evalPostInc(ctx ExprContext, self *term) (v any, err error) {
|
||
|
|
var leftValue any
|
||
|
|
if leftValue, err = self.evalPrefix(ctx); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
if dc, ok := leftValue.(*dataCursor); ok {
|
||
|
|
v, err = dc.Next()
|
||
|
|
} else if isInteger(leftValue) && self.children[0].symbol() == SymIdentifier {
|
||
|
|
v = leftValue
|
||
|
|
i, _ := leftValue.(int64)
|
||
|
|
ctx.SetVar(self.children[0].source(), i+1)
|
||
|
|
} else {
|
||
|
|
self.errIncompatibleType(leftValue)
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// init
|
||
|
|
func init() {
|
||
|
|
registerTermConstructor(SymDoublePlus, newPostIncTerm)
|
||
|
|
}
|