Leonardo de Moura
2ddcc32c1d
fix(frontends/lean/notation): change the precedence of '->'
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It should match the precedence of the implication '=>'.
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-06 13:23:24 -08:00
Leonardo de Moura
4dd6cead83
refactor(equality): make homogeneous equality the default equality
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It was not a good idea to use heterogeneous equality as the default equality in Lean.
It creates the following problems.
- Heterogeneous equality does not propagate constraints in the elaborator.
For example, suppose that l has type (List Int), then the expression
l = nil
will not propagate the type (List Int) to nil.
- It is easy to write false. For example, suppose x has type Real, and the user
writes x = 0. This is equivalent to false, since 0 has type Nat. The elaborator cannot introduce
the coercion since x = 0 is a type correct expression.
Homogeneous equality does not suffer from the problems above.
We keep heterogeneous equality because it is useful for generating proof terms.
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-10-29 16:20:06 -07:00
Leonardo de Moura
d0009d0242
feat(frontends/lean): make the first argument of if-expression implicit, add support for marking implicit arguments on builtin symbols (aka semantic attachments)
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-10-29 15:53:50 -07:00
Leonardo de Moura
46b9b2114a
fix(tests/lean): adjust error messages in the expected output
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-10-24 19:27:26 -07:00
Leonardo de Moura
2ca30571b4
Display the input term in the output of the Check command. It is useful to see the fully elaborated term.
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-09-08 22:55:21 -07:00
Leonardo de Moura
df116f88e0
Improve pretty printer for Pi's
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-09-08 11:04:07 -07:00
Leonardo de Moura
e955c054ca
Modify type checker. Now, it only accepts builtin values that have been declared in the environment. The idea is to be able to track which classes of builtin values have been used in a given environment. We want to be able to quantify the size of the trusted code base for a particular development.
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-09-04 08:30:04 -07:00
Leonardo de Moura
a341643335
Fix unit tests for Windows
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-09-03 10:44:51 -07:00
Leonardo de Moura
e218b92a9d
Modify verbose message for Set command
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-09-02 12:29:21 -07:00
Leonardo de Moura
a3bbd9fbb5
Minimize use the colors in tests. The colors make the diff hard to read
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-09-01 10:34:57 -07:00
Leonardo de Moura
51640ecff8
Move files in examples directory to tests directory. They are not real examples
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-08-31 19:16:30 -07:00
