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https://github.com/RGBCube/serenity
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3048274f5e
Closes #4283. Heredocs are implemented in a way that makes them feel more like a string (and not a weird redirection, a la bash). There are two tunables, whether the string is dedented (`<<-` vs `<<~`) and whether it allows interpolation (quoted key vs not). To the familiar people, this is how Ruby handles them, and I feel is the most elegant heredoc syntax. Unlike the oddjob that is bash, heredocs are treated exactly as normal strings, and can be used _anywhere_ where a string can be used. They are *required* to appear in the same order as used after a newline is seen when parsing the sequence that the heredoc is used in. For instance: ```sh echo <<-doc1 <<-doc2 | blah blah contents for doc1 doc1 contents for doc2 doc2 ``` The typical nice errors are also implemented :^)
64 lines
2.4 KiB
C++
64 lines
2.4 KiB
C++
/*
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* Copyright (c) 2020, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include "Forward.h"
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namespace Shell::AST {
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class NodeVisitor {
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public:
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virtual void visit(const AST::PathRedirectionNode*);
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virtual void visit(const AST::And*);
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virtual void visit(const AST::ListConcatenate*);
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virtual void visit(const AST::Background*);
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virtual void visit(const AST::BarewordLiteral*);
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virtual void visit(const AST::BraceExpansion*);
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virtual void visit(const AST::CastToCommand*);
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virtual void visit(const AST::CastToList*);
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virtual void visit(const AST::CloseFdRedirection*);
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virtual void visit(const AST::CommandLiteral*);
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virtual void visit(const AST::Comment*);
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virtual void visit(const AST::ContinuationControl*);
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virtual void visit(const AST::DynamicEvaluate*);
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virtual void visit(const AST::DoubleQuotedString*);
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virtual void visit(const AST::Fd2FdRedirection*);
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virtual void visit(const AST::FunctionDeclaration*);
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virtual void visit(const AST::ForLoop*);
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virtual void visit(const AST::Glob*);
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virtual void visit(const AST::Heredoc*);
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virtual void visit(const AST::HistoryEvent*);
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virtual void visit(const AST::Execute*);
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virtual void visit(const AST::IfCond*);
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virtual void visit(const AST::ImmediateExpression*);
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virtual void visit(const AST::Join*);
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virtual void visit(const AST::MatchExpr*);
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virtual void visit(const AST::Or*);
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virtual void visit(const AST::Pipe*);
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virtual void visit(const AST::Range*);
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virtual void visit(const AST::ReadRedirection*);
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virtual void visit(const AST::ReadWriteRedirection*);
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virtual void visit(const AST::Sequence*);
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virtual void visit(const AST::Subshell*);
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virtual void visit(const AST::Slice*);
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virtual void visit(const AST::SimpleVariable*);
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virtual void visit(const AST::SpecialVariable*);
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virtual void visit(const AST::Juxtaposition*);
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virtual void visit(const AST::StringLiteral*);
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virtual void visit(const AST::StringPartCompose*);
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virtual void visit(const AST::SyntaxError*);
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virtual void visit(const AST::SyntheticNode*);
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virtual void visit(const AST::Tilde*);
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virtual void visit(const AST::VariableDeclarations*);
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virtual void visit(const AST::WriteAppendRedirection*);
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virtual void visit(const AST::WriteRedirection*);
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protected:
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virtual ~NodeVisitor() = default;
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};
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}
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