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v2: allow type with str method to be used as fn string argument

pull/3792/head
joe-conigliaro 2020-02-20 23:18:55 +11:00
parent c099cd8bf6
commit e7e2c68d09
1 changed files with 4 additions and 0 deletions
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4
vlib/v/checker/checker.v
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@ -157,6 +157,10 @@ pub fn (c mut Checker) call_expr(call_expr ast.CallExpr) table.Type {
typ_sym := c.table.get_type_symbol(typ) typ_sym := c.table.get_type_symbol(typ)
arg_typ_sym := c.table.get_type_symbol(arg.typ) arg_typ_sym := c.table.get_type_symbol(arg.typ)
if !c.table.check(typ, arg.typ) { if !c.table.check(typ, arg.typ) {
// str method, allow type with str method if fn arg is string
if table.type_idx(arg.typ) == table.string_type_idx && typ_sym.has_method('str') {
break
}
c.error('!cannot use type `$typ_sym.name` as type `$arg_typ_sym.name` in argument ${i+1} to `$fn_name`', call_expr.pos) c.error('!cannot use type `$typ_sym.name` as type `$arg_typ_sym.name` in argument ${i+1} to `$fn_name`', call_expr.pos)
} }
} }