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Address feedback from #856 (#864)

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* Make tuple/struct fields mutable.
* Avoid ExpectType when we know it will fail.
This commit is contained in:
Geoff Romer
2021-10-08 16:52:17 -07:00
committed by GitHub
parent 93a002a21a
commit 6068d2306b
5 changed files with 79 additions and 53 deletions
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executable_semantics/ast/expression.h
+22 -14
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@@ -76,16 +76,24 @@ auto TupleExpressionFromParenContents(
Nonnull<Arena*> arena, SourceLocation source_loc,
const ParenContents<Expression>& paren_contents) -> Nonnull<Expression*>;
// A FieldInitializer represents the initialization of a single tuple field.
struct FieldInitializer {
// A FieldInitializer represents the initialization of a single tuple or
// struct field.
class FieldInitializer {
public:
FieldInitializer(std::string name, Nonnull<Expression*> expression)
: name(std::move(name)), expression(expression) {}
: name_(std::move(name)), expression_(expression) {}
auto name() const -> const std::string& { return name_; }
auto expression() const -> Nonnull<const Expression*> { return expression_; }
auto expression() -> Nonnull<Expression*> { return expression_; }
private:
// The field name. Cannot be empty.
std::string name;
std::string name_;
// The expression that initializes the field.
Nonnull<Expression*> expression;
Nonnull<Expression*> expression_;
};
enum class Operator {
@@ -224,16 +232,18 @@ class TupleLiteral : public Expression {
explicit TupleLiteral(SourceLocation source_loc,
std::vector<FieldInitializer> fields)
: Expression(Kind::TupleLiteral, source_loc), fields(std::move(fields)) {}
: Expression(Kind::TupleLiteral, source_loc),
fields_(std::move(fields)) {}
static auto classof(const Expression* exp) -> bool {
return exp->kind() == Kind::TupleLiteral;
}
auto Fields() const -> const std::vector<FieldInitializer>& { return fields; }
auto fields() const -> llvm::ArrayRef<FieldInitializer> { return fields_; }
auto fields() -> llvm::MutableArrayRef<FieldInitializer> { return fields_; }
private:
std::vector<FieldInitializer> fields;
std::vector<FieldInitializer> fields_;
};
// A non-empty literal value of a struct type.
@@ -255,9 +265,8 @@ class StructLiteral : public Expression {
return exp->kind() == Kind::StructLiteral;
}
auto fields() const -> const std::vector<FieldInitializer>& {
return fields_;
}
auto fields() const -> llvm::ArrayRef<FieldInitializer> { return fields_; }
auto fields() -> llvm::MutableArrayRef<FieldInitializer> { return fields_; }
private:
std::vector<FieldInitializer> fields_;
@@ -279,9 +288,8 @@ class StructTypeLiteral : public Expression {
return exp->kind() == Kind::StructTypeLiteral;
}
auto fields() const -> const std::vector<FieldInitializer>& {
return fields_;
}
auto fields() const -> llvm::ArrayRef<FieldInitializer> { return fields_; }
auto fields() -> llvm::MutableArrayRef<FieldInitializer> { return fields_; }
private:
std::vector<FieldInitializer> fields_;