Change collect to implement `AstConv` on a `ItemCtxt` rather than a global context. Have this `ItemCtxt` carry a (currently unused) pointer to the in-scope generics.
Change collect to implement `AstConv` on a `ItemCtxt` rather than a
global context. Have this `ItemCtxt` carry a (currently unused) pointer
to the in-scope generics.

victorvde/rust,graydon/rust,zubron/rust,mihneadb/rust,mvdnes/rust,TheNeikos/rust,ruud-v-a/rust,seanrivera/rust,omasanori/rust,l0kod/rust,vhbit/rust,gifnksm/rust,jroesch/rust,pshc/rust,jashank/rust,ruud-v-a/rust,mihneadb/rust,jashank/rust,vhbit/rust,ruud-v-a/rust,AerialX/rust-rt-minimal,krzysz00/rust,jashank/rust,carols10cents/rust,rprichard/rust,reem/rust,robertg/rust,jashank/rust,seanrivera/rust,seanrivera/rust,mdinger/rust,XMPPwocky/rust,dwillmer/rust,nwin/rust,andars/rust,andars/rust,ebfull/rust,robertg/rust,jroesch/rust,kwantam/rust,AerialX/rust,AerialX/rust,reem/rust,vhbit/rust,rohitjoshi/rust,dwillmer/rust,pshc/rust,GBGamer/rust,zaeleus/rust,philyoon/rust,ejjeong/rust,ebfull/rust,miniupnp/rust,carols10cents/rust,dwillmer/rust,GBGamer/rust,ebfull/rust,mdinger/rust,aidancully/rust,cllns/rust,KokaKiwi/rust,krzysz00/rust,rprichard/rust,cllns/rust,miniupnp/rust,philyoon/rust,vhbit/rust,rprichard/rust,rohitjoshi/rust,kwantam/rust,sae-bom/rust,philyoon/rust,KokaKiwi/rust,pelmers/rust,TheNeikos/rust,mvdnes/rust,zachwick/rust,sae-bom/rust,GBGamer/rust,philyoon/rust,ruud-v-a/rust,pshc/rust,mahkoh/rust,XMPPwocky/rust,AerialX/rust,miniupnp/rust,l0kod/rust,zubron/rust,seanrivera/rust,nwin/rust,mahkoh/rust,vhbit/rust,kwantam/rust,rohitjoshi/rust,zaeleus/rust,cllns/rust,aepsil0n/rust,l0kod/rust,XMPPwocky/rust,miniupnp/rust,TheNeikos/rust,nwin/rust,jashank/rust,pshc/rust,vhbit/rust,AerialX/rust-rt-minimal,miniupnp/rust,jashank/rust,zachwick/rust,kwantam/rust,pshc/rust,AerialX/rust,zubron/rust,KokaKiwi/rust,mihneadb/rust,KokaKiwi/rust,sae-bom/rust,mahkoh/rust,victorvde/rust,nwin/rust,miniupnp/rust,nwin/rust,graydon/rust,jroesch/rust,avdi/rust,krzysz00/rust,andars/rust,rohitjoshi/rust,mvdnes/rust,aidancully/rust,omasanori/rust,jroesch/rust,KokaKiwi/rust,ejjeong/rust,avdi/rust,reem/rust,mahkoh/rust,GBGamer/rust,mihneadb/rust,mdinger/rust,pelmers/rust,avdi/rust,graydon/rust,graydon/rust,aepsil0n/rust,carols10cents/rust,mihneadb/rust,AerialX/rust-rt-minimal,l0kod/rust,mdinger/rust,mdinger/rust,GBGamer/rust,gifnksm/rust,ejjeong/rust,l0kod/rust,nwin/rust,aneeshusa/rust,gifnksm/rust,ebfull/rust,l0kod/rust,ruud-v-a/rust,sae-bom/rust,victorvde/rust,aidancully/rust,zachwick/rust,jashank/rust,XMPPwocky/rust,aneeshusa/rust,pelmers/rust,nwin/rust,ruud-v-a/rust,philyoon/rust,philyoon/rust,jroesch/rust,AerialX/rust-rt-minimal,aneeshusa/rust,nwin/rust,l0kod/rust,zaeleus/rust,pshc/rust,rohitjoshi/rust,gifnksm/rust,l0kod/rust,zaeleus/rust,mahkoh/rust,zubron/rust,zubron/rust,zachwick/rust,TheNeikos/rust,cllns/rust,rohitjoshi/rust,aepsil0n/rust,TheNeikos/rust,kwantam/rust,rprichard/rust,rprichard/rust,graydon/rust,seanrivera/rust,zaeleus/rust,robertg/rust,dwillmer/rust,vhbit/rust,TheNeikos/rust,krzysz00/rust,zaeleus/rust,avdi/rust,aneeshusa/rust,aneeshusa/rust,ebfull/rust,omasanori/rust,carols10cents/rust,kwantam/rust,zubron/rust,aidancully/rust,aneeshusa/rust,sae-bom/rust,gifnksm/rust,omasanori/rust,dwillmer/rust,reem/rust,pshc/rust,cllns/rust,aidancully/rust,krzysz00/rust,robertg/rust,graydon/rust,mahkoh/rust,jroesch/rust,avdi/rust,ejjeong/rust,XMPPwocky/rust,pshc/rust,robertg/rust,GBGamer/rust,ejjeong/rust,AerialX/rust-rt-minimal,ejjeong/rust,zachwick/rust,mvdnes/rust,dwillmer/rust,zubron/rust,aepsil0n/rust,miniupnp/rust,AerialX/rust-rt-minimal,aepsil0n/rust,GBGamer/rust,zubron/rust,mvdnes/rust,victorvde/rust,mdinger/rust,jroesch/rust,AerialX/rust,aepsil0n/rust,gifnksm/rust,ebfull/rust,jroesch/rust,victorvde/rust,robertg/rust,reem/rust,omasanori/rust,dwillmer/rust,carols10cents/rust,vhbit/rust,andars/rust,mvdnes/rust,andars/rust,XMPPwocky/rust,GBGamer/rust,andars/rust,KokaKiwi/rust,victorvde/rust,pelmers/rust,avdi/rust,sae-bom/rust,miniupnp/rust,mihneadb/rust,carols10cents/rust,pelmers/rust,jashank/rust,omasanori/rust,seanrivera/rust,rprichard/rust,cllns/rust,zachwick/rust,AerialX/rust,dwillmer/rust,reem/rust,aidancully/rust,pelmers/rust,krzysz00/rust