55 lines
1.7 KiB
Text
55 lines
1.7 KiB
Text
/-
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Copyright (c) 2016 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: Leonardo de Moura
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-/
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prelude
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import init.ordering
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/- Reflect a C++ name object. The VM replaces it with the C++ implementation. -/
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inductive name :=
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| anonymous : name
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| mk_string : string → name → name
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| mk_numeral : unsigned → name → name
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definition name.is_inhabited [instance] : inhabited name :=
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inhabited.mk name.anonymous
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definition mk_str_name (n : name) (s : string) : name :=
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name.mk_string s n
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definition mk_num_name (n : name) (v : nat) : name :=
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name.mk_numeral (unsigned.of_nat v) n
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definition mk_simple_name [coercion] (s : string) : name :=
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mk_str_name name.anonymous s
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infix ` <.> `:65 := mk_str_name
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open name
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definition name.get_prefix : name → name
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| anonymous := anonymous
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| (mk_string s p) := p
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| (mk_numeral s p) := p
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definition name.to_string : name → string
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| anonymous := "[anonymous]"
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| (mk_string s anonymous) := s
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| (mk_numeral v anonymous) := to_string v
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| (mk_string s n) := name.to_string n + "." + s
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| (mk_numeral v n) := name.to_string n + "." + to_string v
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definition name.has_to_string [instance] : has_to_string name :=
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has_to_string.mk name.to_string
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/- TODO(Leo): provide a definition in Lean. -/
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meta_constant name.has_decidable_eq : decidable_eq name
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/- Both cmp and lex_cmp are total orders, but lex_cmp implements a lexicographical order. -/
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meta_constant name.cmp : name → name → ordering
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meta_constant name.lex_cmp : name → name → ordering
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attribute [instance] name.has_decidable_eq
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meta_definition name_has_ordering [instance] : has_ordering name :=
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has_ordering.mk name.cmp
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