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Code Issues Packages Projects Releases 10 Wiki Activity

Add support for _ placeholder. (#661)

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Co-authored-by: Jon Meow <46229924+jonmeow@users.noreply.github.com>
This commit is contained in:
Geoff Romer
2021-07-19 10:33:06 -07:00
committed by GitHub
co-authored by Jon Meow
parent c3c89a77a4
commit def98d1182
15 changed files with 88 additions and 20 deletions
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executable_semantics/interpreter/value.h
+4 -3
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@@ -110,7 +110,8 @@ struct TupleValue {
struct BindingPlaceholderValue {
static constexpr ValKind Kind = ValKind::BindingPlaceholderValue;
std::string name;
// nullopt represents the `_` placeholder
std::optional<std::string> name;
const Value* type;
};
@@ -183,8 +184,8 @@ struct Value {
static auto MakeAlternativeConstructorValue(std::string alt_name,
std::string choice_name)
-> const Value*;
static auto MakeBindingPlaceholderValue(std::string name, const Value* type)
-> const Value*;
static auto MakeBindingPlaceholderValue(std::optional<std::string> name,
const Value* type) -> const Value*;
static auto MakeIntType() -> const Value*;
static auto MakeContinuationType() -> const Value*;
static auto MakeAutoType() -> const Value*;