lean4-htt/tests/elab/mangling.lean
Garmelon 08eb78a5b2
chore: switch to new test/bench suite (#12590)
This PR sets up the new integrated test/bench suite. It then migrates
all benchmarks and some related tests to the new suite. There's also
some documentation and some linting.

For now, a lot of the old tests are left alone so this PR doesn't become
even larger than it already is. Eventually, all tests should be migrated
to the new suite though so there isn't a confusing mix of two systems.
2026-02-25 13:51:53 +00:00

97 lines
2.5 KiB
Text

module
import Lean.Compiler.IR.CompilerM
import Lean.Compiler.NameMangling
import Lean.Compiler.LCNF.ExplicitBoxing
/-!
# Test behavior of name mangling
-/
open Lean IR
open Lean.Compiler.LCNF (mkBoxedName)
def checkMangle (n : Name) (s : String) : IO Unit := do
if n.mangle "" ≠ s then
throw <| .userError s!"failed: {n} mangles to {n.mangle ""} but expected {s}"
if .demangle s ≠ n then
throw <| .userError s!"failed: {s} demangles to {Lean.Name.demangle s} but expected {n}"
if n ≠ .anonymous ∧ mkMangledBoxedName s ≠ (mkBoxedName n).mangle "" then
throw <| .userError s!"failed: {mkBoxedName n} mangles to {(mkBoxedName n).mangle ""} but \
mkMangledBoxedName produced {mkMangledBoxedName s}"
/-!
Mangling simple identifiers with optional number components and preceding underscores.
-/
#eval checkMangle `ab12 "ab12"
#eval checkMangle ``Lean.Name.mangle "Lean_Name_mangle"
#eval checkMangle `Lean.Name.mangle._aux "Lean_Name_mangle___aux"
#eval checkMangle ((`_private.Lean.Compiler.NameMangling).num 0 ++ `Lean.Name.mangleAux)
"__private_Lean_Compiler_NameMangling_0__Lean_Name_mangleAux"
/-!
Escape sequences in mangled identifiers.
-/
#eval checkMangle `«ÿ» "00_xff"
#eval checkMangle `«α₁» "00_u03b1_u2081"
#eval checkMangle `«𝒫» "00_U0001d4ab"
/-!
Escape sequence disambiguation
-/
#eval checkMangle `a' "a_x27"
#eval checkMangle `a.x27 "a_00x27"
#eval checkMangle `a_' "a___x27"
#eval checkMangle `a._x27 "a_00__x27"
#eval checkMangle `a.u0027 "a_00u0027"
#eval checkMangle `a.U00000027 "a_00U00000027"
#eval checkMangle `a.ucafe "a_00ucafe"
#eval checkMangle `a.uCAFE "a_uCAFE" -- uppercase does not need to be disambiguated
/-!
Trailing underscores in names
-/
#eval checkMangle `a._b "a___b"
#eval checkMangle `a_.b "a___00b"
#eval checkMangle `a_ "a__"
#eval checkMangle `a_.«» "a___00"
#eval checkMangle `a.__ "a_00____"
/-!
Empty name components
-/
#eval checkMangle `a_b "a__b"
#eval checkMangle `a.«».b "a_00_b"
#eval checkMangle `«».b "00_b"
#eval checkMangle `b_.«» "b___00"
/-!
Numbers vs numbers in text
-/
#eval checkMangle ((`a).num 2 ++ `b) "a_2__b"
#eval checkMangle `a.«2_b» "a_002__b"
/-!
Consecutive number components
-/
#eval checkMangle ((`a).num 2 |>.num 3 |>.str "" |>.num 4) "a_2__3__00_4_"
/-!
Preceding number components
-/
#eval checkMangle (.str (.num .anonymous 4) "hi") "4__hi"
/-!
Anonymous vs empty string
-/
#eval checkMangle .anonymous ""
#eval checkMangle `«» "00"
#eval checkMangle `«».«» "00_00"