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Add specification for type synonyms in DAML-LF #3635

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merged 5 commits into from
Nov 26, 2019
Merged

Add specification for type synonyms in DAML-LF #3635

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28eec2b
Add specification for type synonyms in DAML-LF
cocreature Nov 26, 2019
ebe2dc4
Fix identifiers for type synonyms
cocreature Nov 26, 2019
00e1202
Use S for type synonyms
cocreature Nov 26, 2019
74a6228
Address review comments
cocreature Nov 26, 2019
dfc3adf
Split up TyTypeSynonym and DefTypeSynonym
cocreature Nov 26, 2019
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Use S for type synonyms
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@cocreature
cocreature committed Nov 26, 2019
commit 00e1202b2afc964e56ad688e5e974ee027a1241e
10 changes: 5 additions & 5 deletions daml-lf/spec/daml-lf-1.rst
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Expand Up @@ -681,7 +681,7 @@ available for usage::
| 'variant' T (α₁: k₁)… (αₙ: kₙ) ↦ V₁ : τ₁ | … | Vₘ : τₘ
-- DefVariant
| 'enum' T ↦ E₁ | … | Eₘ -- DefEnum
| 'synonym' T (α₁: k₁)… (αₙ: kₙ) ↦ τ -- DefTypeSynonym
| 'synonym' S (α₁: k₁)… (αₙ: kₙ) ↦ τ -- DefTypeSynonym
| 'val' W : τ ↦ e -- DefValue
| 'tpl' (x : T) ↦ -- DefTemplate
{ 'precondition' e₁
Expand Down Expand Up @@ -852,11 +852,11 @@ First, we formally defined *well-formed types*. ::
————————————————————————————————————————————— TyTuple
Γ ⊢ ⟨ f₁: τ₁, …, fₙ: τₙ ⟩ : ⋆

'synonym' T (α₁:k₁) … (αₙ:kₙ) ↦ τ ∈ 〚Ξ〛Mod
'synonym' S (α₁:k₁) … (αₙ:kₙ) ↦ τ ∈ 〚Ξ〛Mod
(α₁:k₁) … (αₙ:kₙ) · Γ ⊢ τ : ⋆
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@remyhaemmerle-da remyhaemmerle-da Nov 26, 2019 •
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Suggested change
(α₁:k₁) … (αₙ:kₙ) · Γ ⊢ τ : ⋆

This line would better go in Well-formed definitions paragraph.

    αₙ : kₙ · ⋯ · α₁ : k₁  ⊢  τ  :  ⋆
  ——————————————————————————————————————————————————————————————— DefSyn
    ⊢  'synonym' S (α₁: k₁) … (αₙ: kₙ) ↦ τ

Γ ⊢ α₁ : k₁ … Γ ⊢ αₙ : kₙ
————————————————————————————————————————————— TyTypeSynonym
Γ ⊢ T α₁ … αₙ : ⋆
Γ ⊢ S α₁ … αₙ : ⋆



Expand Down Expand Up @@ -996,9 +996,9 @@ Then we define *well-formed expressions*. ::
——————————————————————————————————————————————————————————————— ExpEnumCon
Γ ⊢ Mod:T:Eᵢ : Mod:T

'synonym' T (α₁:k₁) … (αₙ:kₙ) ↦ τ Γ ↦ e : τ
'synonym' S (α₁:k₁) … (αₙ:kₙ) ↦ τ Γ ↦ e : τ
——————————————————————————————————————————————————————————————— ExpTypeSynonym
Γ ⊢ e : Mod:T α₁ … αₙ
Γ ⊢ e : Mod:S α₁ … αₙ

Γ ⊢ e₁ : τ₁ … Γ ⊢ eₘ : τₘ
——————————————————————————————————————————————————————————————— ExpTupleCon
Expand Down