41 lines
1.6 KiB
C++
41 lines
1.6 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
|
|
*/
|
|
#pragma once
|
|
#include "expr.h"
|
|
|
|
namespace lean {
|
|
/**
|
|
\brief Replace the expressions s[0], ..., s[n-1] in e with var(n-1), ..., var(0).
|
|
|
|
Structural equality is used to compare subexpressions of e with the s[i]'s.
|
|
|
|
\pre s[0], ..., s[n-1] must be closed expressions (i.e., no free variables).
|
|
*/
|
|
expr abstract(expr const & e, unsigned n, expr const * s);
|
|
inline expr abstract(expr const & e, expr const & s) { return abstract(e, 1, &s); }
|
|
|
|
/**
|
|
\brief Replace the expressions s[0], ..., s[n-1] in e with var(n-1), ..., var(0).
|
|
|
|
Pointer comparison is used to compare subexpressions of e with the s[i]'s.
|
|
|
|
\pre s[0], ..., s[n-1] must be closed expressions (i.e., no free variables).
|
|
*/
|
|
expr abstract_p(expr const & e, unsigned n, expr const * s);
|
|
inline expr abstract_p(expr const & e, expr const & s) { return abstract_p(e, 1, &s); }
|
|
|
|
/**
|
|
\brief Create a lambda expression (lambda (x : t) b), the term b is abstracted using abstract(b, constant(x)).
|
|
*/
|
|
inline expr fun(name const & n, expr const & t, expr const & b) { return lambda(n, t, abstract(b, constant(n))); }
|
|
inline expr fun(char const * n, expr const & t, expr const & b) { return fun(name(n), t, b); }
|
|
/**
|
|
\brief Create a Pi expression (pi (x : t) b), the term b is abstracted using abstract(b, constant(x)).
|
|
*/
|
|
inline expr Fun(name const & n, expr const & t, expr const & b) { return pi(n, t, abstract(b, constant(n))); }
|
|
inline expr Fun(char const * n, expr const & t, expr const & b) { return Fun(name(n), t, b); }
|
|
}
|