Re: [go-nuts] what does ctxt param to typecheck means?
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Ian Lance Taylor
Feb 12, 2021, 3:27:48 PM2/12/21
to xie cui, golang-nuts
On Fri, Feb 12, 2021 at 7:14 AM xie cui <cuiw...@gmail.com> wrote:
>
> https://github.com/golang/go/blob/master/src/cmd/compile/internal/gc/typecheck.go
> i feel had to understand the param ctxt to typecheck, could you explain to me?
I'm sorry, can you be more specific? The declaration of typecheck is
func typecheck(n *Node, top int) (res *Node) {
It does not have a param "ctx".
If you are asking about the parameter "top", it holds a bitmask of
values like ctxStmt and ctxExpr. The bits in the bitmask describing
how the value being type checked (the parameter "n") is being used:
whether it is being used as a statement, as an expression, and so
forth.
Ian
>
> https://github.com/golang/go/blob/master/src/cmd/compile/internal/gc/typecheck.go
> i feel had to understand the param ctxt to typecheck, could you explain to me?
I'm sorry, can you be more specific? The declaration of typecheck is
func typecheck(n *Node, top int) (res *Node) {
It does not have a param "ctx".
If you are asking about the parameter "top", it holds a bitmask of
values like ctxStmt and ctxExpr. The bits in the bitmask describing
how the value being type checked (the parameter "n") is being used:
whether it is being used as a statement, as an expression, and so
forth.
Ian
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