12382576351

Committed 17 Dec 2024 10:31PM UTC coverage: 79.406% (+0.07%) from 79.337%

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/src/arkreactor/Compiler/NameResolution/NameResolutionPass.cpp

#include <Ark/Compiler/NameResolution/NameResolutionPass.hpp>

#include <Ark/Exceptions.hpp>
#include <Ark/Utils.hpp>
#include <Ark/Builtins/Builtins.hpp>

namespace Ark::internal
{
    NameResolutionPass::NameResolutionPass(const unsigned debug) :
        Pass("NameResolution", debug),
        m_ast()
    {
        for (const auto& builtin : Builtins::builtins)
            m_language_symbols.emplace(builtin.first);
        for (auto ope : Language::operators)
            m_language_symbols.emplace(ope);
        for (auto inst : Language::listInstructions)
            m_language_symbols.emplace(inst);

        m_language_symbols.emplace(Language::And);
        m_language_symbols.emplace(Language::Or);
        m_language_symbols.emplace(Language::SysArgs);
    }

    void NameResolutionPass::process(const Node& ast)
    {
        m_logger.traceStart("process");

        m_ast = ast;
        visit(m_ast, /* register_declarations= */ true);

        m_logger.traceEnd();

        m_logger.trace("AST after name resolution");
        if (m_logger.shouldTrace())
            m_ast.debugPrint(std::cout) << '\n';

        m_logger.traceStart("checkForUndefinedSymbol");
        checkForUndefinedSymbol();
        m_logger.traceEnd();
    }

    const Node& NameResolutionPass::ast() const noexcept
    {
        return m_ast;
    }

    std::string NameResolutionPass::addDefinedSymbol(const std::string& sym, const bool is_mutable)
    {
        const std::string fully_qualified_name = m_scope_resolver.registerInCurrent(sym, is_mutable);
        m_defined_symbols.emplace(fully_qualified_name);
        return fully_qualified_name;
    }

    void NameResolutionPass::visit(Node& node, const bool register_declarations)
    {
        switch (node.nodeType())
        {
            case NodeType::Symbol:
            {
                const std::string old_name = node.string();
                updateSymbolWithFullyQualifiedName(node);
                addSymbolNode(node, old_name);
                break;
            }

            case NodeType::Field:
                for (auto& child : node.list())
                {
                    const std::string old_name = child.string();
                    // in case of field, no need to check if we can fully qualify names
                    child.setString(m_scope_resolver.getFullyQualifiedNameInNearestScope(old_name));
                    addSymbolNode(child, old_name);
                }
                break;

            case NodeType::List:
                if (!node.constList().empty())
                {
                    if (node.constList()[0].nodeType() == NodeType::Keyword)
                        visitKeyword(node, node.constList()[0].keyword(), register_declarations);
                    else
                    {
                        // function calls
                        // the UpdateRef function calls kind get a special treatment, like let/mut/set,
                        // because we need to check for mutability errors
                        if (node.constList().size() > 1 && node.constList()[0].nodeType() == NodeType::Symbol &&
                            node.constList()[1].nodeType() == NodeType::Symbol && register_declarations)
                        {
                            const auto funcname = node.constList()[0].string();
                            const auto arg = node.constList()[1].string();

                            if (std::ranges::find(Language::UpdateRef, funcname) != Language::UpdateRef.end() && m_scope_resolver.isImmutable(arg).value_or(false))
                                throw CodeError(
                                    fmt::format("MutabilityError: Can not modify the constant list `{}' using `{}'", arg, funcname),
                                    node.filename(),
                                    node.constList()[1].line(),
                                    node.constList()[1].col(),
                                    arg);

                            // check that we aren't doing a (append! a a) nor a (concat! a a)
                            if (funcname == Language::AppendInPlace || funcname == Language::ConcatInPlace)
                            {
                                for (std::size_t i = 2, end = node.constList().size(); i < end; ++i)
                                {
                                    if (node.constList()[i].nodeType() == NodeType::Symbol && node.constList()[i].string() == arg)
                                        throw CodeError(
                                            fmt::format("MutabilityError: Can not {} the list `{}' to itself", funcname, arg),
                                            node.filename(),
                                            node.constList()[1].line(),
                                            node.constList()[1].col(),
                                            arg);
                                }
                            }
                        }

                        for (auto& child : node.list())
                            visit(child, register_declarations);
                    }
                }
                break;

            case NodeType::Namespace:
            {
                auto& namespace_ = node.arkNamespace();
                // no need to guard createNewNamespace with an if (register_declarations), we want to keep the namespace node
                // (which will get ignored by the compiler, that only uses its AST), so that we can (re)construct the
                // scopes correctly
                m_scope_resolver.createNewNamespace(namespace_.name, namespace_.with_prefix, namespace_.is_glob, namespace_.symbols);
                StaticScope* scope = m_scope_resolver.currentScope();

                visit(*namespace_.ast, /* register_declarations= */ true);
                // dual visit so that we can handle forward references
                visit(*namespace_.ast, /* register_declarations= */ false);

                // if we had specific symbols to import, check that those exist
                if (!namespace_.symbols.empty())
                {
                    for (const auto& sym : namespace_.symbols)
                    {
                        if (!scope->get(sym, true).has_value())
                            throw CodeError(
                                fmt::format("ImportError: Can not import symbol {} from {}, as it isn't in the package", sym, namespace_.name),
                                namespace_.ast->filename(),
                                namespace_.ast->line(),
                                namespace_.ast->col(),
                                "import");
                    }
                }

                m_scope_resolver.saveNamespaceAndRemove();
                break;
            }

            default:
                break;
        }
    }

    void NameResolutionPass::visitKeyword(Node& node, const Keyword keyword, const bool register_declarations)
    {
        switch (keyword)
        {
            case Keyword::Set:
                [[fallthrough]];
            case Keyword::Let:
                [[fallthrough]];
            case Keyword::Mut:
                // first, visit the value, then register the symbol
                // this allows us to detect things like (let foo (fun (&foo) ()))
                if (node.constList().size() > 2)
                    visit(node.list()[2], register_declarations);
                if (node.constList().size() > 1 && node.constList()[1].nodeType() == NodeType::Symbol)
                {
                    const std::string& name = node.constList()[1].string();
                    if (m_language_symbols.contains(name) && register_declarations)
                        throw CodeError(
                            fmt::format("Can not use a reserved identifier ('{}') as a {} name.", name, keyword == Keyword::Let ? "constant" : "variable"),
                            node.filename(),
                            node.constList()[1].line(),
                            node.constList()[1].col(),
                            name);

                    if (m_scope_resolver.isInScope(name) && keyword == Keyword::Let && register_declarations)
                        throw CodeError(
                            fmt::format("MutabilityError: Can not use 'let' to redefine variable `{}'", name),
                            node.filename(),
                            node.constList()[1].line(),
                            node.constList()[1].col(),
                            name);
                    if (keyword == Keyword::Set && m_scope_resolver.isRegistered(name))
                    {
                        if (m_scope_resolver.isImmutable(name).value_or(false) && register_declarations)
                            throw CodeError(
                                fmt::format("MutabilityError: Can not set the constant `{}' to {}", name, node.constList()[2].repr()),
                                node.filename(),
                                node.constList()[1].line(),
                                node.constList()[1].col(),
                                name);

                        updateSymbolWithFullyQualifiedName(node.list()[1]);
                    }
                    else if (keyword != Keyword::Set)
                    {
                        // update the declared variable name to use the fully qualified name
                        // this will prevent name conflicts, and handle scope resolution
                        const std::string fully_qualified_name = addDefinedSymbol(name, keyword != Keyword::Let);
                        if (register_declarations)
                            node.list()[1].setString(fully_qualified_name);
                    }
                }
                break;

            case Keyword::Import:
                if (!node.constList().empty())
                    m_plugin_names.push_back(node.constList()[1].constList().back().string());
                break;

            case Keyword::While:
                // create a new scope to track variables
                m_scope_resolver.createNew();
                for (auto& child : node.list())
                    visit(child, register_declarations);
                // remove the scope once the loop has been compiled, only we were registering declarations
                m_scope_resolver.removeLastScope();
                break;

            case Keyword::Fun:
                // create a new scope to track variables
                m_scope_resolver.createNew();

                if (node.constList()[1].nodeType() == NodeType::List)
                {
                    for (auto& child : node.list()[1].list())
                    {
                        if (child.nodeType() == NodeType::Capture)
                        {
                            if (!m_scope_resolver.isRegistered(child.string()) && register_declarations)
                                throw CodeError(
                                    fmt::format("Can not capture {} because it is referencing a variable defined in an unreachable scope.", child.string()),
                                    child.filename(),
                                    child.line(),
                                    child.col(),
                                    child.repr());

                            // update the declared variable name to use the fully qualified name
                            // this will prevent name conflicts, and handle scope resolution
                            std::string fqn = updateSymbolWithFullyQualifiedName(child);
                            addDefinedSymbol(fqn, true);
                        }
                        else if (child.nodeType() == NodeType::Symbol)
                            addDefinedSymbol(child.string(), /* is_mutable= */ true);
                    }
                }
                if (node.constList().size() > 2)
                    visit(node.list()[2], register_declarations);

                // remove the scope once the function has been compiled, only we were registering declarations
                m_scope_resolver.removeLastScope();
                break;

            default:
                for (auto& child : node.list())
                    visit(child, register_declarations);
                break;
        }
    }

    void NameResolutionPass::addSymbolNode(const Node& symbol, const std::string& old_name)
    {
        const std::string& name = symbol.string();

        // we don't accept builtins/operators as a user symbol
        if (m_language_symbols.contains(name))
            return;

        // remove the old name node, to avoid false positive when looking for unbound symbols
        if (!old_name.empty())
        {
            auto it = std::ranges::find_if(m_symbol_nodes, [&old_name, &symbol](const Node& sym_node) -> bool {
                return sym_node.string() == old_name &&
                    sym_node.col() == symbol.col() &&
                    sym_node.line() == symbol.line() &&
                    sym_node.filename() == symbol.filename();
            });
            if (it != m_symbol_nodes.end())
            {
                it->setString(name);
                return;
            }
        }

        const auto it = std::ranges::find_if(m_symbol_nodes, [&name](const Node& sym_node) -> bool {
            return sym_node.string() == name;
        });
        if (it == m_symbol_nodes.end())
            m_symbol_nodes.push_back(symbol);
    }

    bool NameResolutionPass::mayBeFromPlugin(const std::string& name) const noexcept
    {
        std::string splitted = Utils::splitString(name, ':')[0];
        const auto it = std::ranges::find_if(
            m_plugin_names,
            [&splitted](const std::string& plugin) -> bool {
                return plugin == splitted;
            });
        return it != m_plugin_names.end();
    }

    std::string NameResolutionPass::updateSymbolWithFullyQualifiedName(Node& symbol)
    {
        auto [allowed, fqn] = m_scope_resolver.canFullyQualifyName(symbol.string());

        if (m_language_symbols.contains(fqn) && symbol.string() != fqn)
        {
            throw CodeError(
                fmt::format(
                    "Symbol `{}' was resolved to `{}', which is also a builtin name. Either the symbol or the package it's in needs to be renamed to avoid conflicting with the builtin.",
                    symbol.string(), fqn),
                symbol.filename(),
                symbol.line(),
                symbol.col(),
                symbol.repr());
        }
        if (!allowed)
        {
            std::string message;
            if (fqn.ends_with("#hidden"))
                message = fmt::format(
                    R"(Unbound variable "{}". However, it exists in a namespace as "{}", did you forget to add it to the symbol list while importing?)",
                    symbol.string(),
                    fqn.substr(0, fqn.find_first_of('#')));
            else
                message = fmt::format(R"(Unbound variable "{}". However, it exists in a namespace as "{}", did you forget to prefix it with its namespace?)", symbol.string(), fqn);
            throw CodeError(
                message,
                symbol.filename(),
                symbol.line(),
                symbol.col(),
                symbol.repr());
        }

        symbol.setString(fqn);
        return fqn;
    }

    void NameResolutionPass::checkForUndefinedSymbol() const
    {
        for (const auto& sym : m_symbol_nodes)
        {
            const auto& str = sym.string();
            const bool is_plugin = mayBeFromPlugin(str);

            if (!m_defined_symbols.contains(str) && !is_plugin)
            {
                std::string message;

                const std::string suggestion = offerSuggestion(str);
                if (suggestion.empty())
                    message = fmt::format(R"(Unbound variable error "{}" (variable is used but not defined))", str);
                else
                {
                    const std::string prefix = suggestion.substr(0, suggestion.find_first_of(':'));
                    const std::string note_about_prefix = fmt::format(
                        " You either forgot to import it in the symbol list (eg `(import {} :{})') or need to fully qualify it by adding the namespace",
                        prefix,
                        str);
                    const bool add_note = suggestion.ends_with(":" + str);
                    message = fmt::format(R"(Unbound variable error "{}" (did you mean "{}"?{}))", str, suggestion, add_note ? note_about_prefix : "");
                }

                throw CodeError(message, sym.filename(), sym.line(), sym.col(), sym.repr());
            }
        }
    }

    std::string NameResolutionPass::offerSuggestion(const std::string& str) const
    {
        auto iterate = [](const std::string& word, const std::unordered_set<std::string>& dict) -> std::string {
            std::string suggestion;
            // our suggestion shouldn't require more than half the string to change
            std::size_t suggestion_distance = word.size() / 2;
            for (const std::string& symbol : dict)
            {
                const std::size_t current_distance = Utils::levenshteinDistance(word, symbol);
                if (current_distance <= suggestion_distance)
                {
                    suggestion_distance = current_distance;
                    suggestion = symbol;
                }
            }
            return suggestion;
        };

        std::string suggestion = iterate(str, m_defined_symbols);
        // look for a suggestion related to language builtins
        if (suggestion.empty())
            suggestion = iterate(str, m_language_symbols);
        // look for a suggestion related to a namespace change
        if (suggestion.empty())
        {
            if (const auto it = std::ranges::find_if(m_defined_symbols, [&str](const std::string& symbol) {
                    return symbol.ends_with(":" + str);
                });
                it != m_defined_symbols.end())
                suggestion = *it;
        }

        return suggestion;
    }
}

1	#include <Ark/Compiler/NameResolution/NameResolutionPass.hpp>
2
3	#include <Ark/Exceptions.hpp>
4	#include <Ark/Utils.hpp>
5	#include <Ark/Builtins/Builtins.hpp>
6
7	namespace Ark::internal
8	{
9	NameResolutionPass::NameResolutionPass(const unsigned debug) :	308✔
10	Pass("NameResolution", debug),	154✔
11	m_ast()	154✔
12	{	308✔
13	for (const auto& builtin : Builtins::builtins)	8,778✔
14	m_language_symbols.emplace(builtin.first);	8,624✔
15	for (auto ope : Language::operators)	3,850✔
16	m_language_symbols.emplace(ope);	3,696✔
17	for (auto inst : Language::listInstructions)	1,540✔
18	m_language_symbols.emplace(inst);	1,386✔
19
20	m_language_symbols.emplace(Language::And);	154✔
21	m_language_symbols.emplace(Language::Or);	154✔
22	m_language_symbols.emplace(Language::SysArgs);	154✔
23	}	154✔
24
25	void NameResolutionPass::process(const Node& ast)	111✔
26	{	111✔
27	m_logger.traceStart("process");	111✔
28
29	m_ast = ast;	85✔
30	visit(m_ast, /* register_declarations= */ true);	85✔
31
32	m_logger.traceEnd();	85✔
33
34	m_logger.trace("AST after name resolution");	85✔
35	if (m_logger.shouldTrace())	85✔
36	m_ast.debugPrint(std::cout) << '\n';	×
37
38	m_logger.traceStart("checkForUndefinedSymbol");	85✔
39	checkForUndefinedSymbol();	85✔
40	m_logger.traceEnd();	85✔
41	}	85✔
42
43	const Node& NameResolutionPass::ast() const noexcept	83✔
44	{	83✔
45	return m_ast;	83✔
46	}
47
48	std::string NameResolutionPass::addDefinedSymbol(const std::string& sym, const bool is_mutable)	1,785✔
49	{	1,785✔
50	const std::string fully_qualified_name = m_scope_resolver.registerInCurrent(sym, is_mutable);	1,785✔
51	m_defined_symbols.emplace(fully_qualified_name);	1,785✔
52	return fully_qualified_name;	1,785✔
53	}	1,785✔
54
55	void NameResolutionPass::visit(Node& node, const bool register_declarations)	90,066✔
56	{	90,066✔
57	switch (node.nodeType())	90,066✔
58	{	8,148✔
59	case NodeType::Symbol:
60	{
61	const std::string old_name = node.string();	8,148✔
62	updateSymbolWithFullyQualifiedName(node);	8,148✔
63	addSymbolNode(node, old_name);	8,145✔
64	break;
65	}	8,893✔
66
67	case NodeType::Field:
68	for (auto& child : node.list())	2,224✔
69	{
70	const std::string old_name = child.string();	1,487✔
71	// in case of field, no need to check if we can fully qualify names
72	child.setString(m_scope_resolver.getFullyQualifiedNameInNearestScope(old_name));	1,487✔
73	addSymbolNode(child, old_name);	1,487✔
74	}	1,487✔
75	break;	9,755✔
76
77	case NodeType::List:
78	if (!node.constList().empty())	9,018✔
79	{
80	if (node.constList()[0].nodeType() == NodeType::Keyword)	8,993✔
81	visitKeyword(node, node.constList()[0].keyword(), register_declarations);	3,189✔
82	else
83	{
84	// function calls
85	// the UpdateRef function calls kind get a special treatment, like let/mut/set,
86	// because we need to check for mutability errors
87	if (node.constList().size() > 1 && node.constList()[0].nodeType() == NodeType::Symbol &&	7,371✔
88	node.constList()[1].nodeType() == NodeType::Symbol && register_declarations)	4,115✔
89	{
90	const auto funcname = node.constList()[0].string();	819✔
91	const auto arg = node.constList()[1].string();	819✔
92
93	if (std::ranges::find(Language::UpdateRef, funcname) != Language::UpdateRef.end() && m_scope_resolver.isImmutable(arg).value_or(false))	819✔
94	throw CodeError(	10✔
95	fmt::format("MutabilityError: Can not modify the constant list `{}' using `{}'", arg, funcname),	5✔
96	node.filename(),	5✔
97	node.constList()[1].line(),	5✔
98	node.constList()[1].col(),	5✔
99	arg);	5✔
100
101	// check that we aren't doing a (append! a a) nor a (concat! a a)
102	if (funcname == Language::AppendInPlace \|\| funcname == Language::ConcatInPlace)	814✔
103	{
104	for (std::size_t i = 2, end = node.constList().size(); i < end; ++i)	68✔
105	{
106	if (node.constList()[i].nodeType() == NodeType::Symbol && node.constList()[i].string() == arg)	34✔
107	throw CodeError(	4✔
108	fmt::format("MutabilityError: Can not {} the list `{}' to itself", funcname, arg),	2✔
109	node.filename(),	2✔
110	node.constList()[1].line(),	2✔
111	node.constList()[1].col(),	2✔
112	arg);	2✔
113	}	32✔
114	}	32✔
115	}	819✔
116
117	for (auto& child : node.list())	87,298✔
118	visit(child, register_declarations);	81,501✔
119	}
120	}	8,986✔
121	break;	9,043✔
122
123	case NodeType::Namespace:
124	{
125	auto& namespace_ = node.arkNamespace();	32✔
126	// no need to guard createNewNamespace with an if (register_declarations), we want to keep the namespace node
127	// (which will get ignored by the compiler, that only uses its AST), so that we can (re)construct the
128	// scopes correctly
129	m_scope_resolver.createNewNamespace(namespace_.name, namespace_.with_prefix, namespace_.is_glob, namespace_.symbols);	32✔
130	StaticScope* scope = m_scope_resolver.currentScope();	32✔
131
132	visit(namespace_.ast, / register_declarations= */ true);	32✔
133	// dual visit so that we can handle forward references
134	visit(namespace_.ast, / register_declarations= */ false);	32✔
135
136	// if we had specific symbols to import, check that those exist
137	if (!namespace_.symbols.empty())	32✔
138	{
139	for (const auto& sym : namespace_.symbols)	28✔
140	{
141	if (!scope->get(sym, true).has_value())	17✔
142	throw CodeError(	2✔
143	fmt::format("ImportError: Can not import symbol {} from {}, as it isn't in the package", sym, namespace_.name),	1✔
144	namespace_.ast->filename(),	1✔
145	namespace_.ast->line(),	1✔
146	namespace_.ast->col(),	1✔
147	"import");	1✔
148	}	17✔
149	}	10✔
150
151	m_scope_resolver.saveNamespaceAndRemove();	31✔
152	break;
153	}	72,163✔
154
155	default:
156	break;	72,131✔
157	}	90,005✔
158	}	90,016✔
159
160	void NameResolutionPass::visitKeyword(Node& node, const Keyword keyword, const bool register_declarations)	3,189✔
161	{	3,189✔
162	switch (keyword)	3,189✔
163	{	1,251✔
164	case Keyword::Set:
165	[[fallthrough]];
166	case Keyword::Let:
167	[[fallthrough]];
168	case Keyword::Mut:
169	// first, visit the value, then register the symbol
170	// this allows us to detect things like (let foo (fun (&foo) ()))
171	if (node.constList().size() > 2)	1,251✔
172	visit(node.list()[2], register_declarations);	1,250✔
173	if (node.constList().size() > 1 && node.constList()[1].nodeType() == NodeType::Symbol)	1,251✔
174	{
175	const std::string& name = node.constList()[1].string();	1,249✔
176	if (m_language_symbols.contains(name) && register_declarations)	1,249✔
177	throw CodeError(	4✔
178	fmt::format("Can not use a reserved identifier ('{}') as a {} name.", name, keyword == Keyword::Let ? "constant" : "variable"),	2✔
179	node.filename(),	2✔
180	node.constList()[1].line(),	2✔
181	node.constList()[1].col(),	2✔
182	name);	2✔
183
184	if (m_scope_resolver.isInScope(name) && keyword == Keyword::Let && register_declarations)	1,247✔
185	throw CodeError(	2✔
186	fmt::format("MutabilityError: Can not use 'let' to redefine variable `{}'", name),	1✔
187	node.filename(),	1✔
188	node.constList()[1].line(),	1✔
189	node.constList()[1].col(),	1✔
190	name);	1✔
191	if (keyword == Keyword::Set && m_scope_resolver.isRegistered(name))	1,246✔
192	{
193	if (m_scope_resolver.isImmutable(name).value_or(false) && register_declarations)	206✔
194	throw CodeError(	2✔
195	fmt::format("MutabilityError: Can not set the constant `{}' to {}", name, node.constList()[2].repr()),	1✔
196	node.filename(),	1✔
197	node.constList()[1].line(),	1✔
198	node.constList()[1].col(),	1✔
199	name);	1✔
200
201	updateSymbolWithFullyQualifiedName(node.list()[1]);	205✔
202	}	205✔
203	else if (keyword != Keyword::Set)	1,040✔
204	{
205	// update the declared variable name to use the fully qualified name
206	// this will prevent name conflicts, and handle scope resolution
207	const std::string fully_qualified_name = addDefinedSymbol(name, keyword != Keyword::Let);	1,037✔
208	if (register_declarations)	1,037✔
209	node.list()[1].setString(fully_qualified_name);	570✔
210	}	1,037✔
211	}	1,251✔
212	break;	1,247✔
213
214	case Keyword::Import:
215	if (!node.constList().empty())	×
216	m_plugin_names.push_back(node.constList()[1].constList().back().string());	×
217	break;	99✔
218
219	case Keyword::While:
220	// create a new scope to track variables
221	m_scope_resolver.createNew();	99✔
222	for (auto& child : node.list())	395✔
223	visit(child, register_declarations);	296✔
224	// remove the scope once the loop has been compiled, only we were registering declarations
225	m_scope_resolver.removeLastScope();	99✔
226	break;	554✔
227
228	case Keyword::Fun:
229	// create a new scope to track variables
230	m_scope_resolver.createNew();	455✔
231
232	if (node.constList()[1].nodeType() == NodeType::List)	455✔
233	{
234	for (auto& child : node.list()[1].list())	1,200✔
235	{
236	if (child.nodeType() == NodeType::Capture)	746✔
237	{
238	if (!m_scope_resolver.isRegistered(child.string()) && register_declarations)	145✔
239	throw CodeError(	4✔
240	fmt::format("Can not capture {} because it is referencing a variable defined in an unreachable scope.", child.string()),	2✔
241	child.filename(),	2✔
242	child.line(),	2✔
243	child.col(),	2✔
244	child.repr());	2✔
245
246	// update the declared variable name to use the fully qualified name
247	// this will prevent name conflicts, and handle scope resolution
248	std::string fqn = updateSymbolWithFullyQualifiedName(child);	143✔
249	addDefinedSymbol(fqn, true);	143✔
250	}	143✔
251	else if (child.nodeType() == NodeType::Symbol)	601✔
252	addDefinedSymbol(child.string(), /* is_mutable= */ true);	601✔
253	}	746✔
254	}	452✔
255	if (node.constList().size() > 2)	453✔
256	visit(node.list()[2], register_declarations);	452✔
257
258	// remove the scope once the function has been compiled, only we were registering declarations
259	m_scope_resolver.removeLastScope();	453✔
260	break;	1,837✔
261
262	default:
263	for (auto& child : node.list())	7,748✔
264	visit(child, register_declarations);	6,364✔
265	break;	1,384✔
266	}	3,183✔
267	}	3,189✔
268
269	void NameResolutionPass::addSymbolNode(const Node& symbol, const std::string& old_name)	9,632✔
270	{	9,632✔
271	const std::string& name = symbol.string();	9,632✔
272
273	// we don't accept builtins/operators as a user symbol
274	if (m_language_symbols.contains(name))	9,632✔
275	return;	4,564✔
276
277	// remove the old name node, to avoid false positive when looking for unbound symbols
278	if (!old_name.empty())	5,068✔
279	{
280	auto it = std::ranges::find_if(m_symbol_nodes, [&old_name, &symbol](const Node& sym_node) -> bool {	423,946✔
281	return sym_node.string() == old_name &&	423,540✔
282	sym_node.col() == symbol.col() &&	4,662✔
283	sym_node.line() == symbol.line() &&	5,833✔
284	sym_node.filename() == symbol.filename();	2,667✔
285	});
286	if (it != m_symbol_nodes.end())	5,068✔
287	{
288	it->setString(name);	2,667✔
289	return;	2,667✔
290	}
291	}	5,068✔
292
293	const auto it = std::ranges::find_if(m_symbol_nodes, [&name](const Node& sym_node) -> bool {	194,204✔
294	return sym_node.string() == name;	191,803✔
295	});
296	if (it == m_symbol_nodes.end())	2,401✔
297	m_symbol_nodes.push_back(symbol);	302✔
298	}	9,632✔
299
300	bool NameResolutionPass::mayBeFromPlugin(const std::string& name) const noexcept	298✔
301	{	298✔
302	std::string splitted = Utils::splitString(name, ':')[0];	298✔
303	const auto it = std::ranges::find_if(	298✔
304	m_plugin_names,	298✔
305	[&splitted](const std::string& plugin) -> bool {	298✔
306	return plugin == splitted;	×
307	});
308	return it != m_plugin_names.end();	298✔
309	}	298✔
310
311	std::string NameResolutionPass::updateSymbolWithFullyQualifiedName(Node& symbol)	8,496✔
312	{	8,496✔
313	auto [allowed, fqn] = m_scope_resolver.canFullyQualifyName(symbol.string());	38,550✔
314
315	if (m_language_symbols.contains(fqn) && symbol.string() != fqn)	8,496✔
316	{
317	throw CodeError(	2✔
318	fmt::format(	1✔
319	"Symbol `{}' was resolved to `{}', which is also a builtin name. Either the symbol or the package it's in needs to be renamed to avoid conflicting with the builtin.",	1✔
320	symbol.string(), fqn),	1✔
321	symbol.filename(),	1✔
322	symbol.line(),	1✔
323	symbol.col(),	1✔
324	symbol.repr());	1✔
325	}
326	if (!allowed)	8,495✔
327	{
328	std::string message;	2✔
329	if (fqn.ends_with("#hidden"))	2✔
330	message = fmt::format(	2✔
331	R"(Unbound variable "{}". However, it exists in a namespace as "{}", did you forget to add it to the symbol list while importing?)",	1✔
332	symbol.string(),	1✔
333	fqn.substr(0, fqn.find_first_of('#')));	2✔
334	else
335	message = fmt::format(R"(Unbound variable "{}". However, it exists in a namespace as "{}", did you forget to prefix it with its namespace?)", symbol.string(), fqn);	1✔
336	throw CodeError(	4✔
337	message,
338	symbol.filename(),	2✔
339	symbol.line(),	2✔
340	symbol.col(),	2✔
341	symbol.repr());	2✔
342	}	2✔
343
344	symbol.setString(fqn);	8,493✔
345	return fqn;	8,493✔
346	}	8,499✔
347
348	void NameResolutionPass::checkForUndefinedSymbol() const	85✔
349	{	85✔
350	for (const auto& sym : m_symbol_nodes)	383✔
351	{
352	const auto& str = sym.string();	298✔
353	const bool is_plugin = mayBeFromPlugin(str);	298✔
354
355	if (!m_defined_symbols.contains(str) && !is_plugin)	298✔
356	{
357	std::string message;	2✔
358
359	const std::string suggestion = offerSuggestion(str);	2✔
360	if (suggestion.empty())	2✔
361	message = fmt::format(R"(Unbound variable error "{}" (variable is used but not defined))", str);	1✔
362	else
363	{
364	const std::string prefix = suggestion.substr(0, suggestion.find_first_of(':'));	1✔
365	const std::string note_about_prefix = fmt::format(	2✔
366	" You either forgot to import it in the symbol list (eg `(import {} :{})') or need to fully qualify it by adding the namespace",	1✔
367	prefix,
368	str);	1✔
369	const bool add_note = suggestion.ends_with(":" + str);	1✔
370	message = fmt::format(R"(Unbound variable error "{}" (did you mean "{}"?{}))", str, suggestion, add_note ? note_about_prefix : "");	1✔
371	}	1✔
372
373	throw CodeError(message, sym.filename(), sym.line(), sym.col(), sym.repr());	2✔
374	}	2✔
375	}	298✔
376	}	85✔
377
378	std::string NameResolutionPass::offerSuggestion(const std::string& str) const	2✔
379	{	2✔
380	auto iterate = [](const std::string& word, const std::unordered_set<std::string>& dict) -> std::string {	5✔
381	std::string suggestion;	3✔
382	// our suggestion shouldn't require more than half the string to change
383	std::size_t suggestion_distance = word.size() / 2;	3✔
384	for (const std::string& symbol : dict)	98✔
385	{
386	const std::size_t current_distance = Utils::levenshteinDistance(word, symbol);	95✔
387	if (current_distance <= suggestion_distance)	95✔
388	{
389	suggestion_distance = current_distance;	1✔
390	suggestion = symbol;	1✔
391	}	1✔
392	}	95✔
393	return suggestion;	3✔
394	};	3✔
395
396	std::string suggestion = iterate(str, m_defined_symbols);	2✔
397	// look for a suggestion related to language builtins
398	if (suggestion.empty())	2✔
399	suggestion = iterate(str, m_language_symbols);	1✔
400	// look for a suggestion related to a namespace change
401	if (suggestion.empty())	2✔
402	{
403	if (const auto it = std::ranges::find_if(m_defined_symbols, [&str](const std::string& symbol) {	3✔
404	return symbol.ends_with(":" + str);	1✔
405	});
406	it != m_defined_symbols.end())	1✔
407	suggestion = *it;	×
408	}	1✔
409
410	return suggestion;	2✔
411	}	2✔
412	}

ArkScript-lang / Ark / 12382576351

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