This upstreams NatCast and IntCast alone independent of norm_cast in
#3322.
This will allow more efficiently upstreaming parts of Std.Data.Int
relevant for omega.
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Co-authored-by: Scott Morrison <scott.morrison@gmail.com>
By having the `pp.proofs` feature use `⋯` when omitting proofs, when
users copy/paste terms from the InfoView the elaborator can give an
error message explaining why the term cannot be elaborated.
Also adds `pp.proofs.threshold` option to allow users to pretty print
shallow proof terms. By default, only atomic proof terms are pretty
printed.
This adjustment was suggested in PR #3201, which added `⋯` and the
related `pp.deepTerms` option.
When projection functions are delaborated, intermediate parent
projections are no longer printed. For example, rather than pretty
printing as `o.toB.toA.x` with these `toB` and `toA` parent projections,
it pretty prints as `o.x`.
This feature is being upstreamed from mathlib.
This is not a complete upstreaming of that file (it also supports `∀ᵉ (x
< 2) (y < 3), p x y` as shorthand for `∀ x < 2, ∀ y < 3, p x y`, but I
don't think we need this; it is used in Mathlib).
Syntaxes still need to be made built-in.
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Co-authored-by: Leonardo de Moura <leomoura@amazon.com>
This will collect definitions from Std.Logic
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Co-authored-by: David Thrane Christiansen <david@davidchristiansen.dk>
Co-authored-by: Scott Morrison <scott.morrison@gmail.com>
This causes problems when used in conjunction with `#guard_msgs` (which
checks whitespace) and trailing whitespace removal. Discovered by
@PatrickMassot in verbose-lean4.
We previously had the syntax for `change` and `change at`, but no
implementation.
This moves Kyle's implementation from Std.
This also changes the `changeLocalDecl` function to push nodes to the
infotree about FVar aliases.
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Co-authored-by: Leonardo de Moura <leomoura@amazon.com>
Co-authored-by: David Thrane Christiansen <david@davidchristiansen.dk>
This moves the `rcases` and `obtain` tactics from Std, and makes them
built-in tactics.
We will separately move the test cases from Std after #3297
(`guard_expr`).
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Co-authored-by: Leonardo de Moura <leomoura@amazon.com>
Moves the `@[coe]` attribute and associated elaborators/delaborators
from Std to Lean.
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Co-authored-by: Leonardo de Moura <leomoura@amazon.com>
This is used in the "Try this:" widget machinery powering `simp?`.
There is a test file in Std, which I am not upstreaming at the same
time, as that relies on more code actions / #guard_msgs material. That
test file will still of course test things from Std, and later it can be
reunited with the code it is testing.
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Co-authored-by: Leonardo de Moura <leomoura@amazon.com>
The induction principle used by `induction` may have explicit parameters
that are
not motive, target or “real” alternatives (that have the `motive` as
conclusion), e.g. restrictions on the `motive` or other parameters.
Previously, `induction` would treat them as normal alternatives, and try
to re-introduce the automatically reverted hypotheses. But this only
works when the `motive` is actually the conclusion in the type of that
alternative.
We now pay attention to that, thread that information through, and only
revert when needed.
Fixes#3212.
Implements the pretty printer option `pp.numericTypes` for including a
type ascription for numeric literals. For example, `(2 : Nat)`, `(-2 :
Int)`, and `(-2 / 3 : Rat)`. This is useful for debugging how arithmetic
expressions have elaborated or have been otherwise transformed. For
example, with exponentiation is is helpful knowing whether it is `x ^ (2
: Nat)` or `x ^ (2 : Real)`. This is like the Lean 3 option
`pp.numeralTypes` but it has a wider notion of a numeric literal.
Also implements the pretty printer option `pp.natLit` for including the
`nat_lit` prefix for raw natural number literals.
Closes#3021
