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Shell: Allow control structures to appear in pipe sequences

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This makes commands like the following to be possible:
```sh
$ ls && for $(seq 10) { echo $it }
$ ls | for $(seq 1) { cat > foobar }
```
This commit is contained in:
AnotherTest 2020-09-07 20:49:53 +04:30 • committed by Andreas Kling
parent 7b5ead64a5
commit aa2df9277d
Notes: sideshowbarker 2024-07-19 02:48:51 +09:00
5 changed files with 73 additions and 41 deletions
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23
Shell/Parser.cpp
View file

@ -167,12 +167,7 @@ RefPtr<AST::Node> Parser::parse_sequence()
break;
}
RefPtr<AST::Node> first = nullptr;
if (auto control_structure = parse_control_structure())
first = control_structure;
if (!first)
first = parse_or_logical_sequence();
auto first = parse_or_logical_sequence();
if (!first)
return var_decls;
@ -311,23 +306,27 @@ RefPtr<AST::Node> Parser::parse_and_logical_sequence()
RefPtr<AST::Node> Parser::parse_pipe_sequence()
{
auto rule_start = push_start();
auto command = parse_command();
if (!command)
return nullptr;
auto left = parse_control_structure();
if (!left) {
if (auto cmd = parse_command())
left = cmd;
else
return nullptr;
}
consume_while(is_whitespace);
if (peek() != '|')
return command;
return left;
consume();
if (auto pipe_seq = parse_pipe_sequence()) {
return create<AST::Pipe>(move(command), move(pipe_seq)); // Pipe
return create<AST::Pipe>(move(left), move(pipe_seq)); // Pipe
}
putback();
return command;
return left;
}
RefPtr<AST::Node> Parser::parse_command()