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Fix bug in type checker

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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2013-08-05 10:33:05 -07:00
parent 8dab224137
commit 0c610e0a77
2 changed files with 29 additions and 0 deletions
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2
src/kernel/type_check.cpp
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@ -25,6 +25,7 @@ bool is_convertible_core(expr const & expected, expr const & given, environment
}
bool is_convertible(expr const & expected, expr const & given, environment const & env, context const & ctx) {
lean_trace("is_convertible", tout << expected << "\n" << given << "\n" << ctx << "\n";);
if (is_convertible_core(expected, given, env))
return true;
expr e_n = normalize(expected, env, ctx);
@ -97,6 +98,7 @@ struct infer_type_fn {
<< "\ngiven type:\n" << c_t;
if (!empty(ctx))
buffer << "\nin context:\n" << ctx;
throw exception(buffer.str());
}
f_t = instantiate(abst_body(f_t), c);
i++;

27
src/tests/kernel/environment.cpp
View file

@ -11,6 +11,7 @@ Author: Leonardo de Moura
#include "normalize.h"
#include "abstract.h"
#include "exception.h"
#include "trace.h"
#include "test.h"
using namespace lean;
@ -103,10 +104,36 @@ static void tst3() {
}
}
static void tst4() {
environment env;
env.add_definition("a", int_type(), int_value(1), true); // add opaque definition
expr t = app(int_add(), constant("a"), int_value(1));
std::cout << t << " --> " << normalize(t, env) << "\n";
lean_assert(normalize(t, env) == t);
env.add_definition("b", int_type(), app(int_add(), constant("a"), int_value(1)));
expr t2 = app(int_sub(), constant("b"), int_value(9));
std::cout << t2 << " --> " << normalize(t2, env) << "\n";
lean_assert(normalize(t2, env) == app(int_sub(), app(int_add(), constant("a"), int_value(1)), int_value(9)));
}
static void tst5() {
environment env;
env.add_definition("a", int_type(), int_value(1), true); // add opaque definition
try {
std::cout << infer_type(app(int_add(), constant("a"), int_type()), env) << "\n";
lean_unreachable();
} catch (exception ex) {
std::cout << "expected error: " << ex.what() << "\n";
}
}
int main() {
enable_trace("is_convertible");
continue_on_violation(true);
tst1();
tst2();
tst3();
tst4();
tst5();
return has_violations() ? 1 : 0;
}