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refactor(kernel/formatter): formatter_cell object should not perform destructive updates

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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2014-05-24 13:11:54 -07:00
parent 4398f3ec04
commit 49b2bb209d
2 changed files with 2 additions and 2 deletions
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2
src/kernel/formatter.cpp
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@ -213,7 +213,7 @@ std::ostream & operator<<(std::ostream & out, expr const & e) {
class simple_formatter_cell : public formatter_cell {
public:
virtual format operator()(environment const & env, expr const & e, options const &) {
virtual format operator()(environment const & env, expr const & e, options const &) const {
std::ostringstream s;
print_expr_fn pr(s, env.prop_proof_irrel());
pr(e);

2
src/kernel/formatter.h
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@ -30,7 +30,7 @@ class formatter_cell {
public:
virtual ~formatter_cell() {}
/** \brief Format the given expression. */
virtual format operator()(environment const & env, expr const & e, options const & opts) = 0;
virtual format operator()(environment const & env, expr const & e, options const & opts) const = 0;
};
/**
\brief Smart-pointer for the actual formatter object (aka \c formatter_cell).