36 lines
826 B
C++
36 lines
826 B
C++
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/*
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Copyright (c) 2013 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Leonardo de Moura
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*/
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#include "context.h"
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#include "exception.h"
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namespace lean {
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std::ostream & operator<<(std::ostream & out, context const & c) {
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if (c) {
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if (tail(c))
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out << tail(c) << "\n";
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context_entry const & e = head(c);
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if (e.get_name().is_anonymous())
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out << "_";
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else
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out << e.get_name();
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out << " : " << e.get_type();
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}
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return out;
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}
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context const & lookup(context const & c, unsigned i) {
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context const * it1 = &c;
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while (*it1) {
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if (i == 0)
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return *it1;
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--i;
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it1 = &tail(*it1);
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}
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throw exception("unknown free variable");
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}
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}
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