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Code Issues Packages Projects Releases 10 Wiki Activity

Define a base class for all AST nodes. (#947)

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Also implement code-generation to manage the resulting boilerplate.
This commit is contained in:
Geoff Romer
2021-11-16 11:54:47 -08:00
committed by GitHub
parent d854fb93cb
commit 7a5b8434c8
24 changed files with 965 additions and 543 deletions
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executable_semantics/interpreter/resolve_names.cpp
+28 -29
View File
@@ -17,27 +17,27 @@ namespace {
// flow.
void PopulateNamesInPattern(const Pattern& pattern, StaticScope& static_scope) {
switch (pattern.kind()) {
case Pattern::Kind::AlternativePattern: {
case PatternKind::AlternativePattern: {
const auto& alt = cast<AlternativePattern>(pattern);
PopulateNamesInPattern(alt.arguments(), static_scope);
break;
}
case Pattern::Kind::BindingPattern: {
case PatternKind::BindingPattern: {
const auto& binding = cast<BindingPattern>(pattern);
if (binding.name().has_value()) {
static_scope.Add(*binding.name(), &binding);
}
break;
}
case Pattern::Kind::TuplePattern: {
case PatternKind::TuplePattern: {
const auto& tuple = cast<TuplePattern>(pattern);
for (auto* field : tuple.fields()) {
PopulateNamesInPattern(*field, static_scope);
}
break;
}
case Pattern::Kind::AutoPattern:
case Pattern::Kind::ExpressionPattern:
case PatternKind::AutoPattern:
case PatternKind::ExpressionPattern:
// These don't add names.
break;
}
@@ -53,7 +53,7 @@ void PopulateNamesInStatement(Arena* arena,
}
Statement& statement = **opt_statement;
switch (statement.kind()) {
case Statement::Kind::Block: {
case StatementKind::Block: {
// Defines a new scope for names.
auto& block = cast<Block>(statement);
for (const auto& statement : block.statements()) {
@@ -61,33 +61,33 @@ void PopulateNamesInStatement(Arena* arena,
}
break;
}
case Statement::Kind::Continuation: {
case StatementKind::Continuation: {
// Defines a new name and contains a block.
auto& cont = cast<Continuation>(statement);
static_scope.Add(cont.continuation_variable(), &cont);
PopulateNamesInStatement(arena, &cont.body(), static_scope);
break;
}
case Statement::Kind::VariableDefinition: {
case StatementKind::VariableDefinition: {
// Defines a new name.
const auto& var = cast<VariableDefinition>(statement);
PopulateNamesInPattern(var.pattern(), static_scope);
break;
}
case Statement::Kind::If: {
case StatementKind::If: {
// Contains blocks.
auto& if_stmt = cast<If>(statement);
PopulateNamesInStatement(arena, &if_stmt.then_block(), static_scope);
PopulateNamesInStatement(arena, if_stmt.else_block(), static_scope);
break;
}
case Statement::Kind::While: {
case StatementKind::While: {
// Contains a block.
auto& while_stmt = cast<While>(statement);
PopulateNamesInStatement(arena, &while_stmt.body(), static_scope);
break;
}
case Statement::Kind::Match: {
case StatementKind::Match: {
// Contains blocks.
auto& match = cast<Match>(statement);
for (auto& clause : match.clauses()) {
@@ -97,13 +97,13 @@ void PopulateNamesInStatement(Arena* arena,
}
break;
}
case Statement::Kind::Assign:
case Statement::Kind::Await:
case Statement::Kind::Break:
case Statement::Kind::Continue:
case Statement::Kind::ExpressionStatement:
case Statement::Kind::Return:
case Statement::Kind::Run:
case StatementKind::Assign:
case StatementKind::Await:
case StatementKind::Break:
case StatementKind::Continue:
case StatementKind::ExpressionStatement:
case StatementKind::Return:
case StatementKind::Run:
// Neither contains names nor a scope.
break;
}
@@ -114,7 +114,7 @@ void PopulateNamesInStatement(Arena* arena,
void PopulateNamesInMember(Arena* arena, const Member& member,
StaticScope& static_scope) {
switch (member.kind()) {
case Member::Kind::FieldMember: {
case MemberKind::FieldMember: {
const auto& field = cast<FieldMember>(member);
if (field.binding().name().has_value()) {
static_scope.Add(*field.binding().name(), &member);
@@ -130,7 +130,7 @@ void PopulateNamesInMember(Arena* arena, const Member& member,
void PopulateNamesInDeclaration(Arena* arena, Declaration& declaration,
StaticScope& static_scope) {
switch (declaration.kind()) {
case Declaration::Kind::FunctionDeclaration: {
case DeclarationKind::FunctionDeclaration: {
auto& func = cast<FunctionDeclaration>(declaration);
static_scope.Add(func.name(), &declaration);
for (Nonnull<const GenericBinding*> param : func.deduced_parameters()) {
@@ -140,7 +140,7 @@ void PopulateNamesInDeclaration(Arena* arena, Declaration& declaration,
PopulateNamesInStatement(arena, func.body(), static_scope);
break;
}
case Declaration::Kind::ClassDeclaration: {
case DeclarationKind::ClassDeclaration: {
auto& class_decl = cast<ClassDeclaration>(declaration);
static_scope.Add(class_decl.name(), &declaration);
for (auto* member : class_decl.members()) {
@@ -148,11 +148,10 @@ void PopulateNamesInDeclaration(Arena* arena, Declaration& declaration,
}
break;
}
case Declaration::Kind::ChoiceDeclaration: {
case DeclarationKind::ChoiceDeclaration: {
auto& choice = cast<ChoiceDeclaration>(declaration);
static_scope.Add(choice.name(), &declaration);
for (Nonnull<const ChoiceDeclaration::Alternative*> alt :
choice.alternatives()) {
for (Nonnull<const AlternativeSignature*> alt : choice.alternatives()) {
choice.static_scope().Add(alt->name(), alt);
}
// Populate name into declared_names.
@@ -160,7 +159,7 @@ void PopulateNamesInDeclaration(Arena* arena, Declaration& declaration,
// alternatives.
break;
}
case Declaration::Kind::VariableDeclaration:
case DeclarationKind::VariableDeclaration:
auto& var = cast<VariableDeclaration>(declaration);
if (var.binding().name().has_value()) {
static_scope.Add(*(var.binding().name()), &var.binding());
@@ -177,10 +176,10 @@ void PopulateNamesInDeclaration(Arena* arena, Declaration& declaration,
void ResolveNamesInDeclaration(Declaration& declaration,
const StaticScope& static_scope) {
switch (declaration.kind()) {
case Declaration::Kind::FunctionDeclaration:
case Declaration::Kind::ClassDeclaration:
case Declaration::Kind::ChoiceDeclaration:
case Declaration::Kind::VariableDeclaration:
case DeclarationKind::FunctionDeclaration:
case DeclarationKind::ClassDeclaration:
case DeclarationKind::ChoiceDeclaration:
case DeclarationKind::VariableDeclaration:
break;
}
}