124 lines
2.7 KiB
C++
124 lines
2.7 KiB
C++
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// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
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#include "Luau/Scope.h"
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namespace Luau
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{
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Scope::Scope(TypePackId returnType)
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: parent(nullptr)
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, returnType(returnType)
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, level(TypeLevel())
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{
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}
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Scope::Scope(const ScopePtr& parent, int subLevel)
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: parent(parent)
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, returnType(parent->returnType)
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, level(parent->level.incr())
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{
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level.subLevel = subLevel;
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}
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std::optional<TypeId> Scope::lookup(const Symbol& name)
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{
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Scope* scope = this;
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while (scope)
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{
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auto it = scope->bindings.find(name);
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if (it != scope->bindings.end())
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return it->second.typeId;
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scope = scope->parent.get();
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}
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return std::nullopt;
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}
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std::optional<TypeFun> Scope::lookupType(const Name& name)
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{
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const Scope* scope = this;
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while (true)
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{
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auto it = scope->exportedTypeBindings.find(name);
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if (it != scope->exportedTypeBindings.end())
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return it->second;
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it = scope->privateTypeBindings.find(name);
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if (it != scope->privateTypeBindings.end())
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return it->second;
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if (scope->parent)
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scope = scope->parent.get();
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else
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return std::nullopt;
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}
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}
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std::optional<TypeFun> Scope::lookupImportedType(const Name& moduleAlias, const Name& name)
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{
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const Scope* scope = this;
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while (scope)
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{
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auto it = scope->importedTypeBindings.find(moduleAlias);
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if (it == scope->importedTypeBindings.end())
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{
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scope = scope->parent.get();
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continue;
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}
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auto it2 = it->second.find(name);
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if (it2 == it->second.end())
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{
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scope = scope->parent.get();
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continue;
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}
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return it2->second;
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}
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return std::nullopt;
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}
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std::optional<TypePackId> Scope::lookupPack(const Name& name)
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{
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const Scope* scope = this;
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while (true)
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{
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auto it = scope->privateTypePackBindings.find(name);
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if (it != scope->privateTypePackBindings.end())
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return it->second;
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if (scope->parent)
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scope = scope->parent.get();
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else
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return std::nullopt;
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}
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}
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std::optional<Binding> Scope::linearSearchForBinding(const std::string& name, bool traverseScopeChain)
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{
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Scope* scope = this;
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while (scope)
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{
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for (const auto& [n, binding] : scope->bindings)
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{
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if (n.local && n.local->name == name.c_str())
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return binding;
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else if (n.global.value && n.global == name.c_str())
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return binding;
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}
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scope = scope->parent.get();
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if (!traverseScopeChain)
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break;
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}
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return std::nullopt;
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}
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} // namespace Luau
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