56 lines
1.8 KiB
Text
56 lines
1.8 KiB
Text
/-
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Copyright (c) 2017 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Authors: Sebastian Ullrich
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-/
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prelude
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import init.meta.tactic
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open tactic
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meta class has_quote (α : Type) :=
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(quote : α → pexpr)
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@[inline] meta def quote {α : Type} [has_quote α] : α → pexpr :=
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has_quote.quote
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meta instance : has_quote bool :=
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⟨λ b, if b then ``(true) else ``(false)⟩
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meta instance : has_quote nat := ⟨pexpr.mk_prenum_macro⟩
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@[priority std.priority.default + 1]
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meta instance : has_quote string := ⟨pexpr.mk_string_macro⟩
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meta instance : has_quote pexpr := ⟨pexpr.mk_quote_macro⟩
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meta instance : has_quote char :=
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⟨λ ⟨n, pr⟩, ``(char.of_nat %%(quote n))⟩
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meta instance : has_quote unsigned :=
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⟨λ ⟨n, pr⟩, ``(unsigned.of_nat' %%(quote n))⟩
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meta instance : has_quote pos :=
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⟨λ ⟨l, c⟩, ``(pos.mk %%(quote l) %%(quote c))⟩
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meta def name.quote : name → pexpr
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| name.anonymous := ``(name.anonymous)
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| (name.mk_string s n) := ``(name.mk_string %%(quote s) %%(name.quote n))
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| (name.mk_numeral i n) := ``(name.mk_numeral %%(quote i) %%(name.quote n))
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meta instance : has_quote name := ⟨name.quote⟩
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private meta def list.quote {α : Type} [has_quote α] : list α → pexpr
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| [] := ``([])
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| (h::t) := ``(%%(quote h) :: %%(list.quote t))
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meta instance {α : Type} [has_quote α] : has_quote (list α) := ⟨list.quote⟩
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meta instance {α : Type} [has_quote α] : has_quote (option α) :=
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⟨λ opt, match opt with
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| some x := ``(option.some %%(quote x))
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| none := ``(option.none)
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end⟩
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meta instance : has_quote unit := ⟨λ _, ``(unit.star)⟩
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meta instance {α β : Type} [has_quote α] [has_quote β] : has_quote (α × β) :=
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⟨λ ⟨x, y⟩, ``((%%(quote x), %%(quote y)))⟩
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