76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
/*
|
|
Copyright (c) 2013 Microsoft Corporation. All rights reserved.
|
|
Released under Apache 2.0 license as described in the file LICENSE.
|
|
|
|
Author: Leonardo de Moura
|
|
*/
|
|
#include "util/buffer.h"
|
|
#include "kernel/update_expr.h"
|
|
|
|
namespace lean {
|
|
expr update_app(expr const & app, unsigned i, expr const & new_arg) {
|
|
if (is_eqp(arg(app, i), new_arg)) {
|
|
return app;
|
|
} else {
|
|
buffer<expr> new_args;
|
|
unsigned num = num_args(app);
|
|
for (unsigned j = 0; j < num; j++) {
|
|
if (i == j)
|
|
new_args.push_back(new_arg);
|
|
else
|
|
new_args.push_back(arg(app, j));
|
|
}
|
|
return mk_app(new_args);
|
|
}
|
|
}
|
|
|
|
expr update_app(expr const & app, unsigned num_new_args, expr const * new_args) {
|
|
unsigned i;
|
|
unsigned num = num_args(app);
|
|
if (num != num_new_args)
|
|
return mk_app(num_new_args, new_args);
|
|
for (i = 0; i < num; i++) {
|
|
if (!is_eqp(arg(app, i), new_args[i]))
|
|
break;
|
|
}
|
|
if (i < num)
|
|
return mk_app(num, new_args);
|
|
else
|
|
return app;
|
|
}
|
|
|
|
expr update_lambda(expr const & lambda, expr const & d, expr const & b) {
|
|
if (is_eqp(abst_domain(lambda), d) && is_eqp(abst_body(lambda), b))
|
|
return lambda;
|
|
else
|
|
return mk_lambda(abst_name(lambda), d, b);
|
|
}
|
|
|
|
expr update_pi(expr const & pi, expr const & d, expr const & b) {
|
|
if (is_eqp(abst_domain(pi), d) && is_eqp(abst_body(pi), b))
|
|
return pi;
|
|
else
|
|
return mk_pi(abst_name(pi), d, b);
|
|
}
|
|
|
|
expr update_abstraction(expr const & abst, expr const & d, expr const & b) {
|
|
if (is_lambda(abst))
|
|
return update_lambda(abst, d, b);
|
|
else
|
|
return update_pi(abst, d, b);
|
|
}
|
|
|
|
expr update_let(expr const & let, optional<expr> const & t, expr const & v, expr const & b) {
|
|
if (is_eqp(let_type(let), t) && is_eqp(let_value(let), v) && is_eqp(let_body(let), b))
|
|
return let;
|
|
else
|
|
return mk_let(let_name(let), t, v, b);
|
|
}
|
|
|
|
expr update_heq(expr const & eq, expr const & l, expr const & r) {
|
|
if (is_eqp(heq_lhs(eq), l) && is_eqp(heq_rhs(eq), r))
|
|
return eq;
|
|
else
|
|
return mk_heq(l, r);
|
|
}
|
|
}
|