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https://github.com/RGBCube/serenity
synced 2025-05-31 08:58:11 +00:00
Shell: Use NonnullRefPtr to store non-null subnodes
Also replaces null-is-invalid nodes with syntax error nodes.
This commit is contained in:
AnotherTest
Andreas Kling
parent
2d7aaab897
commit
51e598cf0b
4 changed files with 162 additions and 144 deletions
137
Shell/Parser.cpp
137
Shell/Parser.cpp
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@ -128,9 +128,10 @@ RefPtr<AST::Node> Parser::parse()
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auto error_start = push_start();
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m_offset = m_input.length();
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auto syntax_error_node = create<AST::SyntaxError>("Unexpected tokens past the end");
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if (toplevel)
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return create<AST::Join>(move(toplevel), move(syntax_error_node));
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return syntax_error_node;
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if (!toplevel)
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toplevel = move(syntax_error_node);
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else
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toplevel->set_is_syntax_error(*syntax_error_node);
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}
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return toplevel;
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@ -141,7 +142,7 @@ RefPtr<AST::Node> Parser::parse_toplevel()
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auto rule_start = push_start();
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if (auto sequence = parse_sequence())
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return create<AST::Execute>(sequence);
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return create<AST::Execute>(sequence.release_nonnull());
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return nullptr;
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}
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@ -164,7 +165,7 @@ RefPtr<AST::Node> Parser::parse_sequence()
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consume_while(is_any_of("\n;"));
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auto rest = parse_sequence();
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if (rest)
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return create<AST::Sequence>(move(var_decls), move(rest));
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return create<AST::Sequence>(var_decls.release_nonnull(), rest.release_nonnull());
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return var_decls;
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}
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default:
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@ -180,7 +181,7 @@ RefPtr<AST::Node> Parser::parse_sequence()
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return var_decls;
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if (var_decls)
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first = create<AST::Sequence>(move(var_decls), move(first));
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first = create<AST::Sequence>(var_decls.release_nonnull(), first.release_nonnull());
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consume_while(is_whitespace);
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@ -189,15 +190,15 @@ RefPtr<AST::Node> Parser::parse_sequence()
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case '\n':
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consume_while(is_any_of("\n;"));
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if (auto expr = parse_sequence()) {
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return create<AST::Sequence>(move(first), move(expr)); // Sequence
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return create<AST::Sequence>(first.release_nonnull(), expr.release_nonnull()); // Sequence
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}
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return first;
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case '&': {
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auto execute_pipe_seq = first->would_execute() ? first : static_cast<RefPtr<AST::Node>>(create<AST::Execute>(first));
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auto execute_pipe_seq = first->would_execute() ? first.release_nonnull() : static_cast<NonnullRefPtr<AST::Node>>(create<AST::Execute>(first.release_nonnull()));
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consume();
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auto bg = create<AST::Background>(move(first)); // Execute Background
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auto bg = create<AST::Background>(execute_pipe_seq); // Execute Background
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if (auto rest = parse_sequence())
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return create<AST::Sequence>(move(bg), move(rest)); // Sequence Background Sequence
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return create<AST::Sequence>(move(bg), rest.release_nonnull()); // Sequence Background Sequence
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return bg;
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}
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@ -369,7 +370,7 @@ RefPtr<AST::Node> Parser::parse_or_logical_sequence()
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if (!right_and_sequence)
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right_and_sequence = create<AST::SyntaxError>("Expected an expression after '||'");
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return create<AST::Or>(move(and_sequence), move(right_and_sequence));
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return create<AST::Or>(and_sequence.release_nonnull(), right_and_sequence.release_nonnull());
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}
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RefPtr<AST::Node> Parser::parse_and_logical_sequence()
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@ -391,7 +392,7 @@ RefPtr<AST::Node> Parser::parse_and_logical_sequence()
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if (!right_and_sequence)
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right_and_sequence = create<AST::SyntaxError>("Expected an expression after '&&'");
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return create<AST::And>(move(pipe_sequence), move(right_and_sequence));
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return create<AST::And>(pipe_sequence.release_nonnull(), right_and_sequence.release_nonnull());
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}
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RefPtr<AST::Node> Parser::parse_pipe_sequence()
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@ -413,7 +414,7 @@ RefPtr<AST::Node> Parser::parse_pipe_sequence()
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consume();
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if (auto pipe_seq = parse_pipe_sequence()) {
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return create<AST::Pipe>(move(left), move(pipe_seq)); // Pipe
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return create<AST::Pipe>(left.release_nonnull(), pipe_seq.release_nonnull()); // Pipe
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}
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putback();
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@ -431,20 +432,20 @@ RefPtr<AST::Node> Parser::parse_command()
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if (!list_expr)
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return nullptr;
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auto cast = create<AST::CastToCommand>(move(list_expr)); // Cast List Command
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auto cast = create<AST::CastToCommand>(list_expr.release_nonnull()); // Cast List Command
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auto next_command = parse_command();
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if (!next_command)
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return cast;
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return create<AST::Join>(move(cast), move(next_command)); // Join List Command
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return create<AST::Join>(move(cast), next_command.release_nonnull()); // Join List Command
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}
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auto command = parse_command();
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if (!command)
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return redir;
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return create<AST::Join>(move(redir), command); // Join Command Command
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return create<AST::Join>(redir.release_nonnull(), command.release_nonnull()); // Join Command Command
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}
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RefPtr<AST::Node> Parser::parse_control_structure()
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@ -509,7 +510,7 @@ RefPtr<AST::Node> Parser::parse_for_loop()
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auto obrace_error_start = push_start();
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if (!expect('{')) {
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auto syntax_error = create<AST::SyntaxError>("Expected an open brace '{' to start a 'for' loop body");
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return create<AST::ForLoop>(move(variable_name), move(iterated_expression), move(syntax_error), move(in_start_position)); // ForLoop Var Iterated Block
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return create<AST::ForLoop>(move(variable_name), iterated_expression.release_nonnull(), move(syntax_error), move(in_start_position)); // ForLoop Var Iterated Block
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}
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}
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@ -519,7 +520,7 @@ RefPtr<AST::Node> Parser::parse_for_loop()
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auto cbrace_error_start = push_start();
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if (!expect('}')) {
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auto error_start = push_start();
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RefPtr<AST::SyntaxError> syntax_error = create<AST::SyntaxError>("Expected a close brace '}' to end a 'for' loop body");
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auto syntax_error = create<AST::SyntaxError>("Expected a close brace '}' to end a 'for' loop body");
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if (body)
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body->set_is_syntax_error(*syntax_error);
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else
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@ -527,7 +528,7 @@ RefPtr<AST::Node> Parser::parse_for_loop()
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}
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}
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return create<AST::ForLoop>(move(variable_name), move(iterated_expression), move(body), move(in_start_position)); // ForLoop Var Iterated Block
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return create<AST::ForLoop>(move(variable_name), iterated_expression.release_nonnull(), move(body), move(in_start_position)); // ForLoop Var Iterated Block
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}
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RefPtr<AST::Node> Parser::parse_if_expr()
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@ -547,22 +548,21 @@ RefPtr<AST::Node> Parser::parse_if_expr()
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{
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auto cond_error_start = push_start();
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condition = parse_or_logical_sequence();
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if (!condition) {
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auto syntax_error = create<AST::SyntaxError>("Expected a logical sequence after 'if'");
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return create<AST::IfCond>(Optional<AST::Position> {}, move(syntax_error), nullptr, nullptr);
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}
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if (!condition)
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condition = create<AST::SyntaxError>("Expected a logical sequence after 'if'");
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}
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auto parse_braced_toplevel = [&]() -> RefPtr<AST::Node> {
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RefPtr<AST::Node> body;
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{
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auto obrace_error_start = push_start();
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if (!expect('{')) {
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auto syntax_error = create<AST::SyntaxError>("Expected an open brace '{' to start an 'if' true branch");
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return syntax_error;
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body = create<AST::SyntaxError>("Expected an open brace '{' to start an 'if' true branch");
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}
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}
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auto body = parse_toplevel();
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if (!body)
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body = parse_toplevel();
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{
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auto cbrace_error_start = push_start();
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@ -582,9 +582,6 @@ RefPtr<AST::Node> Parser::parse_if_expr()
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consume_while(is_whitespace);
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auto true_branch = parse_braced_toplevel();
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if (true_branch && true_branch->is_syntax_error())
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return create<AST::IfCond>(Optional<AST::Position> {}, move(condition), move(true_branch), nullptr); // If expr syntax_error
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consume_while(is_whitespace);
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Optional<AST::Position> else_position;
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{
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@ -597,14 +594,14 @@ RefPtr<AST::Node> Parser::parse_if_expr()
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consume_while(is_whitespace);
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if (peek() == '{') {
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auto false_branch = parse_braced_toplevel();
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return create<AST::IfCond>(else_position, move(condition), move(true_branch), move(false_branch)); // If expr true_branch Else false_branch
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return create<AST::IfCond>(else_position, condition.release_nonnull(), move(true_branch), move(false_branch)); // If expr true_branch Else false_branch
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}
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auto else_if_branch = parse_if_expr();
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return create<AST::IfCond>(else_position, move(condition), move(true_branch), move(else_if_branch)); // If expr true_branch Else If ...
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return create<AST::IfCond>(else_position, condition.release_nonnull(), move(true_branch), move(else_if_branch)); // If expr true_branch Else If ...
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}
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return create<AST::IfCond>(else_position, move(condition), move(true_branch), nullptr); // If expr true_branch
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return create<AST::IfCond>(else_position, condition.release_nonnull(), move(true_branch), nullptr); // If expr true_branch
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}
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RefPtr<AST::Node> Parser::parse_subshell()
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@ -658,7 +655,7 @@ RefPtr<AST::Node> Parser::parse_match_expr()
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if (consume_while(is_any_of(" \t\n")).is_empty()) {
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auto node = create<AST::MatchExpr>(
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move(match_expression),
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match_expression.release_nonnull(),
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String {}, move(as_position), Vector<AST::MatchEntry> {});
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node->set_is_syntax_error(create<AST::SyntaxError>("Expected whitespace after 'as' in 'match'"));
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return node;
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@ -667,7 +664,7 @@ RefPtr<AST::Node> Parser::parse_match_expr()
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match_name = consume_while(is_word_character);
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if (match_name.is_empty()) {
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auto node = create<AST::MatchExpr>(
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move(match_expression),
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match_expression.release_nonnull(),
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String {}, move(as_position), Vector<AST::MatchEntry> {});
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node->set_is_syntax_error(create<AST::SyntaxError>("Expected an identifier after 'as' in 'match'"));
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return node;
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@ -678,7 +675,7 @@ RefPtr<AST::Node> Parser::parse_match_expr()
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if (!expect('{')) {
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auto node = create<AST::MatchExpr>(
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move(match_expression),
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match_expression.release_nonnull(),
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move(match_name), move(as_position), Vector<AST::MatchEntry> {});
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node->set_is_syntax_error(create<AST::SyntaxError>("Expected an open brace '{' to start a 'match' entry list"));
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return node;
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@ -700,13 +697,13 @@ RefPtr<AST::Node> Parser::parse_match_expr()
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if (!expect('}')) {
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auto node = create<AST::MatchExpr>(
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move(match_expression),
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match_expression.release_nonnull(),
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move(match_name), move(as_position), move(entries));
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node->set_is_syntax_error(create<AST::SyntaxError>("Expected a close brace '}' to end a 'match' entry list"));
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return node;
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}
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return create<AST::MatchExpr>(move(match_expression), move(match_name), move(as_position), move(entries));
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return create<AST::MatchExpr>(match_expression.release_nonnull(), move(match_name), move(as_position), move(entries));
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}
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AST::MatchEntry Parser::parse_match_entry()
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@ -792,9 +789,9 @@ RefPtr<AST::Node> Parser::parse_redirection()
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// Eat a character and hope the problem goes away
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consume();
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}
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return create<AST::SyntaxError>("Expected a path");
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path = create<AST::SyntaxError>("Expected a path after redirection");
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}
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return create<AST::WriteAppendRedirection>(pipe_fd, move(path)); // Redirection WriteAppend
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return create<AST::WriteAppendRedirection>(pipe_fd, path.release_nonnull()); // Redirection WriteAppend
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}
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if (peek() == '&') {
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consume();
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@ -827,9 +824,9 @@ RefPtr<AST::Node> Parser::parse_redirection()
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// Eat a character and hope the problem goes away
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consume();
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}
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return create<AST::SyntaxError>("Expected a path");
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path = create<AST::SyntaxError>("Expected a path after redirection");
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}
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return create<AST::WriteRedirection>(pipe_fd, move(path)); // Redirection Write
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return create<AST::WriteRedirection>(pipe_fd, path.release_nonnull()); // Redirection Write
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}
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case '<': {
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consume();
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@ -851,12 +848,12 @@ RefPtr<AST::Node> Parser::parse_redirection()
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// Eat a character and hope the problem goes away
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consume();
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}
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return create<AST::SyntaxError>("Expected a path");
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path = create<AST::SyntaxError>("Expected a path after redirection");
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}
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if (mode == Read)
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return create<AST::ReadRedirection>(pipe_fd, move(path)); // Redirection Read
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return create<AST::ReadRedirection>(pipe_fd, path.release_nonnull()); // Redirection Read
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return create<AST::ReadWriteRedirection>(pipe_fd, move(path)); // Redirection ReadWrite
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return create<AST::ReadWriteRedirection>(pipe_fd, path.release_nonnull()); // Redirection ReadWrite
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}
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default:
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m_offset = rule_start->offset;
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@ -869,13 +866,13 @@ RefPtr<AST::Node> Parser::parse_list_expression()
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consume_while(is_whitespace);
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auto rule_start = push_start();
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Vector<RefPtr<AST::Node>> nodes;
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Vector<NonnullRefPtr<AST::Node>> nodes;
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do {
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auto expr = parse_expression();
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if (!expr)
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break;
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nodes.append(move(expr));
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nodes.append(expr.release_nonnull());
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} while (!consume_while(is_whitespace).is_empty());
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if (nodes.is_empty())
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@ -889,14 +886,14 @@ RefPtr<AST::Node> Parser::parse_expression()
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auto rule_start = push_start();
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auto starting_char = peek();
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auto read_concat = [&](auto expr) -> RefPtr<AST::Node> {
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auto read_concat = [&](auto&& expr) -> NonnullRefPtr<AST::Node> {
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if (is_whitespace(peek()))
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return expr;
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return move(expr);
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if (auto next_expr = parse_expression())
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return create<AST::Juxtaposition>(move(expr), move(next_expr));
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return create<AST::Juxtaposition>(move(expr), next_expr.release_nonnull());
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return expr;
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return move(expr);
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};
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if (strchr("&|){} ;<>\n", starting_char) != nullptr)
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@ -912,10 +909,10 @@ RefPtr<AST::Node> Parser::parse_expression()
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if (starting_char == '$') {
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if (auto variable = parse_variable())
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return read_concat(variable);
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return read_concat(variable.release_nonnull());
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if (auto inline_exec = parse_evaluate())
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return read_concat(inline_exec);
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return read_concat(inline_exec.release_nonnull());
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}
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if (starting_char == '#')
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@ -931,7 +928,10 @@ RefPtr<AST::Node> Parser::parse_expression()
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return read_concat(create<AST::CastToList>(move(list))); // Cast To List
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}
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return read_concat(parse_string_composite());
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if (auto composite = parse_string_composite())
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return read_concat(composite.release_nonnull());
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return nullptr;
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}
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RefPtr<AST::Node> Parser::parse_string_composite()
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@ -939,35 +939,35 @@ RefPtr<AST::Node> Parser::parse_string_composite()
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auto rule_start = push_start();
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if (auto string = parse_string()) {
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if (auto next_part = parse_string_composite())
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return create<AST::Juxtaposition>(move(string), move(next_part)); // Concatenate String StringComposite
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return create<AST::Juxtaposition>(string.release_nonnull(), next_part.release_nonnull()); // Concatenate String StringComposite
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return string;
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}
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if (auto variable = parse_variable()) {
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if (auto next_part = parse_string_composite())
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return create<AST::Juxtaposition>(move(variable), move(next_part)); // Concatenate Variable StringComposite
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return create<AST::Juxtaposition>(variable.release_nonnull(), next_part.release_nonnull()); // Concatenate Variable StringComposite
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return variable;
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}
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if (auto glob = parse_glob()) {
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if (auto next_part = parse_string_composite())
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return create<AST::Juxtaposition>(move(glob), move(next_part)); // Concatenate Glob StringComposite
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return create<AST::Juxtaposition>(glob.release_nonnull(), next_part.release_nonnull()); // Concatenate Glob StringComposite
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return glob;
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}
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if (auto bareword = parse_bareword()) {
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if (auto next_part = parse_string_composite())
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return create<AST::Juxtaposition>(move(bareword), move(next_part)); // Concatenate Bareword StringComposite
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return create<AST::Juxtaposition>(bareword.release_nonnull(), next_part.release_nonnull()); // Concatenate Bareword StringComposite
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return bareword;
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}
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if (auto inline_command = parse_evaluate()) {
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if (auto next_part = parse_string_composite())
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return create<AST::Juxtaposition>(move(inline_command), move(next_part)); // Concatenate Execute StringComposite
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return create<AST::Juxtaposition>(inline_command.release_nonnull(), next_part.release_nonnull()); // Concatenate Execute StringComposite
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return inline_command;
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}
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@ -1067,10 +1067,10 @@ RefPtr<AST::Node> Parser::parse_doublequoted_string_inner()
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if (auto variable = parse_variable()) {
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auto inner = create<AST::StringPartCompose>(
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move(string_literal),
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move(variable)); // Compose String Variable
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variable.release_nonnull()); // Compose String Variable
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|
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if (auto string = parse_doublequoted_string_inner()) {
|
||||
return create<AST::StringPartCompose>(move(inner), move(string)); // Compose Composition Composition
|
||||
return create<AST::StringPartCompose>(move(inner), string.release_nonnull()); // Compose Composition Composition
|
||||
}
|
||||
|
||||
return inner;
|
||||
|
|
@ -1079,10 +1079,10 @@ RefPtr<AST::Node> Parser::parse_doublequoted_string_inner()
|
|||
if (auto evaluate = parse_evaluate()) {
|
||||
auto composition = create<AST::StringPartCompose>(
|
||||
move(string_literal),
|
||||
move(evaluate)); // Compose String Sequence
|
||||
evaluate.release_nonnull()); // Compose String Sequence
|
||||
|
||||
if (auto string = parse_doublequoted_string_inner()) {
|
||||
return create<AST::StringPartCompose>(move(composition), move(string)); // Compose Composition Composition
|
||||
return create<AST::StringPartCompose>(move(composition), string.release_nonnull()); // Compose Composition Composition
|
||||
}
|
||||
|
||||
return composition;
|
||||
|
|
@ -1142,7 +1142,8 @@ RefPtr<AST::Node> Parser::parse_evaluate()
|
|||
inner = create<AST::SyntaxError>("Unexpected EOF in list");
|
||||
if (!expect(')'))
|
||||
inner->set_is_syntax_error(*create<AST::SyntaxError>("Expected a terminating close paren"));
|
||||
return create<AST::Execute>(move(inner), true);
|
||||
|
||||
return create<AST::Execute>(inner.release_nonnull(), true);
|
||||
}
|
||||
auto inner = parse_expression();
|
||||
|
||||
|
|
@ -1150,11 +1151,11 @@ RefPtr<AST::Node> Parser::parse_evaluate()
|
|||
inner = create<AST::SyntaxError>("Expected a command");
|
||||
} else {
|
||||
if (inner->is_list()) {
|
||||
auto execute_inner = create<AST::Execute>(move(inner), true);
|
||||
inner = execute_inner;
|
||||
auto execute_inner = create<AST::Execute>(inner.release_nonnull(), true);
|
||||
inner = move(execute_inner);
|
||||
} else {
|
||||
auto dyn_inner = create<AST::DynamicEvaluate>(move(inner));
|
||||
inner = dyn_inner;
|
||||
auto dyn_inner = create<AST::DynamicEvaluate>(inner.release_nonnull());
|
||||
inner = move(dyn_inner);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -1237,7 +1238,7 @@ RefPtr<AST::Node> Parser::parse_bareword()
|
|||
text = create<AST::BarewordLiteral>(move(string));
|
||||
}
|
||||
|
||||
return create<AST::Juxtaposition>(move(tilde), move(text)); // Juxtaposition Varible Bareword
|
||||
return create<AST::Juxtaposition>(tilde.release_nonnull(), text.release_nonnull()); // Juxtaposition Varible Bareword
|
||||
}
|
||||
|
||||
if (string.starts_with("\\~")) {
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue