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better error message for 'owned'

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Andreas Rumpf 2019-03-05 06:25:33 +01:00
commit e0437dfec4
1 changed files with 2 additions and 1 deletions
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compiler/semexprs.nim
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@ -1519,7 +1519,8 @@ proc asgnToResultVar(c: PContext, n, le, ri: PNode) {.inline.} =
# Special typing rule: do not allow to pass 'owned T' to 'T' in 'result = x': # Special typing rule: do not allow to pass 'owned T' to 'T' in 'result = x':
if ri.typ != nil and ri.typ.skipTypes(abstractInst).kind == tyOwned and if ri.typ != nil and ri.typ.skipTypes(abstractInst).kind == tyOwned and
le.typ != nil and le.typ.skipTypes(abstractInst).kind != tyOwned: le.typ != nil and le.typ.skipTypes(abstractInst).kind != tyOwned:
localError(c.config, n.info, "cannot return an owned pointer as an unowned pointer") localError(c.config, n.info, "cannot return an owned pointer as an unowned pointer; " &
"use 'owned(" & typeToString(le.typ) & ")' as the return type")
template resultTypeIsInferrable(typ: PType): untyped = template resultTypeIsInferrable(typ: PType): untyped =
typ.isMetaType and typ.kind != tyTypeDesc typ.isMetaType and typ.kind != tyTypeDesc