301dd7ba16
fixes #3770 Also start `rfl` with a `fail` message that is hopefully more helpful than what we get now (see updated test output). This would be a cheaper way to address #3302 without changing the implementation of rfl (as tried in #3714).
23 lines
568 B
Text
23 lines
568 B
Text
macro "foo" : tactic => `(tactic|fail "first")
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macro_rules | `(tactic|foo) => `(tactic|exact 1)
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macro_rules | `(tactic|foo) => `(tactic|fail "middle")
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macro_rules | `(tactic|foo) => `(tactic|exact 2)
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macro_rules | `(tactic|foo) => `(tactic|fail "last")
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def what_is_foo : Nat := by foo
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/-- info: 2 -/
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#guard_msgs in
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#eval what_is_foo
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macro "bar" : tactic => `(tactic|fail "first")
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macro_rules | `(tactic|bar) => `(tactic|fail "middle")
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macro_rules | `(tactic|bar) => `(tactic|fail "last")
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/--
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error: first
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⊢ Nat
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-/
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#guard_msgs in
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def what_is_bar : Nat := by bar
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