36 lines
928 B
C++
36 lines
928 B
C++
/*
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Copyright (c) 2014 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 <utility>
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#include "kernel/formatter.h"
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namespace lean {
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static std::function<void(std::ostream &, expr const & e)> * g_print = nullptr;
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void set_print_fn(std::function<void(std::ostream &, expr const &)> const & fn) {
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if (g_print)
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delete g_print;
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g_print = new std::function<void(std::ostream &, expr const &)>(fn);
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}
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std::ostream & operator<<(std::ostream & out, expr const & e) {
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if (g_print) {
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(*g_print)(out, e);
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} else {
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throw exception("print function is not available, Lean was not initialized correctly");
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}
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return out;
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}
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void print(lean::expr const & a) { std::cout << a << std::endl; }
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void initialize_formatter() {}
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void finalize_formatter() {
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if (g_print)
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delete g_print;
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}
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}
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