c35108cf0d
- `eval_expr` instantiate assigned metavariables occuring in the input expression. - Rename pp.instantiate_goal_mvars to pp.instantiate_mvars - `format_expr` also instantiates assigned metavariables before pretty printing when pp.instantiate_mvars is set to true.
41 lines
715 B
Text
41 lines
715 B
Text
open nat
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open tactic
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meta def match_le (e : expr) : tactic (expr × expr) :=
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match expr.is_le e with
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| (some r) := return r
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| none := tactic.fail "expression is not a leq"
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end
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meta def nat_lit_le : tactic unit := do
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(base_e, bound_e) ← tactic.target >>= match_le,
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base ← tactic.eval_expr ℕ base_e,
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skip
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example : 17 ≤ 555555 :=
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begin
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nat_lit_le,
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admit
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end
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example : { k : ℕ // k ≤ 555555 } :=
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begin
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refine subtype.tag _ _,
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exact 17,
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target >>= trace,
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trace_state,
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nat_lit_le,
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admit
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end
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set_option pp.instantiate_mvars false
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example : { k : ℕ // k ≤ 555555 } :=
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begin
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refine subtype.tag _ _,
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exact 17,
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target >>= trace,
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trace_state,
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nat_lit_le,
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admit
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end
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