KPGPMC/furlang
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refactor(furc): move arena allocator out of the parser

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Refs: #12
This commit is contained in:
Aleksander Krajewski
2026-06-20 11:56:15 +02:00
parent f80abd68ad
commit 190aa8f985
3 changed files with 29 additions and 27 deletions
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furc/src/front/parser.cpp
+20 -20
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@@ -16,11 +16,11 @@ namespace furc::front {
using namespace std::string_literals;
parser::parser(std::string_view filename, std::string_view content)
: m_filename(filename), m_content(content), m_lexer(m_filename, m_content) {}
parser::parser(furlang::arena& arena, std::string_view filename, std::string_view content)
: m_filename(filename), m_content(content), m_lexer(m_filename, m_content), m_arena(&arena) {}
parser::parser(std::string_view filename)
: m_filename(filename) {
parser::parser(furlang::arena& arena, std::string_view filename)
: m_filename(filename), m_arena(&arena) {
std::ifstream file(m_filename, std::ios_base::binary | std::ios_base::ate);
if (!file.is_open()) throw std::runtime_error("failed to open file "s.append(m_filename));
std::streampos size = file.tellg();
@@ -32,7 +32,7 @@ parser::parser(std::string_view filename)
}
ast::program_node_r parser::parse() & {
auto program = m_arena.allocate_shared<ast::program_node>(location{ m_filename });
auto program = m_arena->allocate_shared<ast::program_node>(location{ m_filename });
while (peek_token().has_value()) {
auto decl = parse_declaration();
@@ -67,13 +67,13 @@ ast::declaration_node_r parser::parse_declaration() {
case token_t::LBrace: {
ast::body_r body = parse_body();
if (body.has_error()) return ast::declaration_node_r(ast::error{ body.error().location });
return m_arena.allocate_shared<ast::function_definition_node>(first->location,
return m_arena->allocate_shared<ast::function_definition_node>(first->location,
name->value.string,
std::move(body.value()));
}
case token_t::Semicolon: {
m_peekBuffer.clear();
return m_arena.allocate_shared<ast::function_declaration_node>(first->location, name->value.string);
return m_arena->allocate_shared<ast::function_declaration_node>(first->location, name->value.string);
}
default: return ast::declaration_node_r(ast::error{ tok->location });
}
@@ -109,13 +109,13 @@ ast::statement_node_r parser::parse_statement() {
auto tok = next_token();
if (peek_token()->type == token_t::Semicolon) {
next_token();
return m_arena.allocate_shared<ast::return_statement_node>(location);
return m_arena->allocate_shared<ast::return_statement_node>(location);
}
auto value = parse_expression();
auto err = eat_token(token_t::Semicolon);
if (err.has_error()) return ast::statement_node_r(ast::error{ err.error().location });
return m_arena.allocate_shared<ast::return_statement_node>(location, std::move(value.value()));
return m_arena->allocate_shared<ast::return_statement_node>(location, std::move(value.value()));
}
case keyword_token::If: {
auto tok = next_token();
@@ -136,13 +136,13 @@ ast::statement_node_r parser::parse_statement() {
auto elseBody = parse_statement();
if (elseBody.has_error()) return ast::statement_node_r(ast::error{ elseBody.error().location });
return m_arena.allocate_shared<ast::if_statement_node>(location,
return m_arena->allocate_shared<ast::if_statement_node>(location,
std::move(cond.value()),
std::move(then.value()),
std::move(elseBody.value()));
}
return m_arena.allocate_shared<ast::if_statement_node>(location,
return m_arena->allocate_shared<ast::if_statement_node>(location,
std::move(cond.value()),
std::move(then.value()));
}
@@ -160,7 +160,7 @@ ast::statement_node_r parser::parse_statement() {
auto body = parse_statement();
if (body.has_error()) return ast::statement_node_r(ast::error{ body.error().location });
return m_arena.allocate_shared<ast::while_statement_node>(location,
return m_arena->allocate_shared<ast::while_statement_node>(location,
std::move(cond.value()),
std::move(body.value()));
}
@@ -172,7 +172,7 @@ ast::statement_node_r parser::parse_statement() {
case token_t::LBrace: {
auto body = parse_body();
if (body.has_error()) return ast::statement_node_r(ast::error{ body.error().location });
return m_arena.allocate_shared<ast::compound_statement_node>(location, std::move(body.value()));
return m_arena->allocate_shared<ast::compound_statement_node>(location, std::move(body.value()));
}
default: break;
}
@@ -204,7 +204,7 @@ ast::expression_node_r parser::parse_expression_primary() {
case token_t::Identifier: {
auto tok = next_token();
if (tok.has_error()) return ast::expression_node_r(ast::error{ tok.error().location });
return m_arena.allocate_shared<ast::var_read_expression_node>(tok->location, (*tok)->string);
return m_arena->allocate_shared<ast::var_read_expression_node>(tok->location, (*tok)->string);
}
case token_t::LParen: {
auto tok = next_token();
@@ -216,12 +216,12 @@ ast::expression_node_r parser::parse_expression_primary() {
case token_t::String: {
auto tok = next_token();
if (tok.has_error()) return ast::expression_node_r(ast::error{ tok.error().location });
return m_arena.allocate_shared<ast::string_literal_node>(tok->location, (*tok)->string);
return m_arena->allocate_shared<ast::string_literal_node>(tok->location, (*tok)->string);
}
case token_t::Integer: {
auto tok = next_token();
if (tok.has_error()) return ast::expression_node_r(ast::error{ tok.error().location });
return m_arena.allocate_shared<ast::integer_literal_node>(tok->location, (*tok)->integer);
return m_arena->allocate_shared<ast::integer_literal_node>(tok->location, (*tok)->integer);
}
default: {
return ast::expression_node_r(ast::error{ tok->location });
@@ -262,7 +262,7 @@ ast::expression_node_r parser::parse_expression_unary(std::uint32_t precedence)
expression = std::move(std::move(expr.value()));
}
result = m_arena.allocate_shared<ast::unary_op_expression_node>(token->location,
result = m_arena->allocate_shared<ast::unary_op_expression_node>(token->location,
current.type,
std::move(expression));
}
@@ -389,18 +389,18 @@ ast::expression_node_r parser::parse_expression_rhs(ast::expression_node_p&& ini
switch (current.type) {
case rhsop_info_t::Unaryop:
lhs = m_arena.allocate_shared<ast::unary_op_expression_node>(opToken->location,
lhs = m_arena->allocate_shared<ast::unary_op_expression_node>(opToken->location,
current.unary,
std::move(lhs));
break;
case rhsop_info_t::Binop:
lhs = m_arena.allocate_shared<ast::binary_op_expression_node>(opToken->location,
lhs = m_arena->allocate_shared<ast::binary_op_expression_node>(opToken->location,
current.binary,
std::move(lhs),
std::move(rhs));
break;
case rhsop_info_t::Assignment:
lhs = m_arena.allocate_shared<ast::var_assign_expression_node>(opToken->location,
lhs = m_arena->allocate_shared<ast::var_assign_expression_node>(opToken->location,
current.assignment,
std::move(lhs),
std::move(rhs));