87 lines
3 KiB
Text
87 lines
3 KiB
Text
/-
|
|
Copyright (c) 2018 Microsoft Corporation. All rights reserved.
|
|
Released under Apache 2.0 license as described in the file LICENSE.
|
|
Author: Leonardo de Moura
|
|
-/
|
|
prelude
|
|
import init.lean.name init.lean.parser.stringliteral
|
|
namespace Lean
|
|
open Lean.Parser
|
|
open Lean.Parser.MonadParsec
|
|
|
|
private def String.mangleAux : Nat → String.Iterator → String → String
|
|
| 0 it r := r
|
|
| (i+1) it r :=
|
|
let c := it.curr in
|
|
if c.isAlpha || c.isDigit then
|
|
String.mangleAux i it.next (r.push c)
|
|
else if c = '_' then
|
|
String.mangleAux i it.next (r ++ "__")
|
|
else if c.toNat < 255 then
|
|
let n := c.toNat in
|
|
let r := r ++ "_x" in
|
|
let r := r.push $ Nat.digitChar (n / 16) in
|
|
let r := r.push $ Nat.digitChar (n % 16) in
|
|
String.mangleAux i it.next r
|
|
else
|
|
let n := c.toNat in
|
|
let r := r ++ "_u" in
|
|
let r := r.push $ Nat.digitChar (n / 4096) in
|
|
let n := n % 4096 in
|
|
let r := r.push $ Nat.digitChar (n / 256) in
|
|
let n := n % 256 in
|
|
let r := r.push $ Nat.digitChar (n / 16) in
|
|
let r := r.push $ Nat.digitChar (n % 16) in
|
|
String.mangleAux i it.next r
|
|
|
|
def String.mangle (s : String) : String :=
|
|
String.mangleAux s.length s.mkIterator ""
|
|
|
|
private def parseMangledStringAux : Nat → String → Parsec' String
|
|
| 0 r := pure r
|
|
| (i+1) r :=
|
|
(eoi *> pure r)
|
|
<|> (do c ← alpha, parseMangledStringAux i (r.push c))
|
|
<|> (do c ← digit, parseMangledStringAux i (r.push c))
|
|
<|> (do str "__", parseMangledStringAux i (r.push '_'))
|
|
<|> (do str "_x", d₂ ← parseHexDigit, d₁ ← parseHexDigit,
|
|
parseMangledStringAux i (r.push (Char.ofNat (d₂ * 16 + d₁))))
|
|
<|> (do str "_u", d₄ ← parseHexDigit, d₃ ← parseHexDigit, d₂ ← parseHexDigit, d₁ ← parseHexDigit,
|
|
parseMangledStringAux i (r.push (Char.ofNat (d₄ * 4096 + d₃ * 256 + d₂ * 16 + d₁))))
|
|
|
|
private def parseMangledString : Parsec' String :=
|
|
do r ← remaining, parseMangledStringAux r ""
|
|
|
|
def String.demangle (s : String) : Option String :=
|
|
(Parsec.parse parseMangledString s).toOption
|
|
|
|
private def Name.mangleAux (pre : String) : Name → String
|
|
| Name.anonymous := pre
|
|
| (Name.mkString p s) :=
|
|
let r := Name.mangleAux p in
|
|
let m := String.mangle s in
|
|
r ++ "_s" ++ toString m.length ++ "_" ++ m
|
|
| (Name.mkNumeral p n) :=
|
|
let r := Name.mangleAux p in
|
|
r ++ "_" ++ toString n ++ "_"
|
|
|
|
def Name.mangle (n : Name) (pre : String := "_l") : String :=
|
|
Name.mangleAux pre n
|
|
|
|
private def parseMangledNameAux : Nat → Name → Parsec' Name
|
|
| 0 r := pure r
|
|
| (i+1) r :=
|
|
(eoi *> pure r)
|
|
<|> (do str "_s", n ← num, ch '_',
|
|
(some s) ← String.demangle <$> take n,
|
|
parseMangledNameAux i (r.mkString s))
|
|
<|> (do ch '_', n ← num, ch '_',
|
|
parseMangledNameAux i (r.mkNumeral n))
|
|
|
|
private def parseMangledName (pre : String) : Parsec' Name :=
|
|
do str pre, r ← remaining, parseMangledNameAux r Name.anonymous
|
|
|
|
def Name.demangle (s : String) (pre : String := "_l") : Option Name :=
|
|
(Parsec.parse (parseMangledName pre) s).toOption
|
|
|
|
end Lean
|