67 lines
1.5 KiB
C++
67 lines
1.5 KiB
C++
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#ifndef STAR_SHELL_PARSER_HPP
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#define STAR_SHELL_PARSER_HPP
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#include "StarString.hpp"
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#include "StarEncode.hpp"
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#include "StarBytes.hpp"
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#include "StarFormat.hpp"
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namespace Star {
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// Currently the specification of the "language" is incredibly simple The only
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// thing we process are quoted strings and backslashes Backslashes function as
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// a useful subset of C++ This means: Newline: \n Tab: \t Backslash: \\ Single
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// Quote: \' Double Quote: \" Null: \0 Space: "\ " (without quotes ofc, not
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// actually C++) Also \v \b \a \f \r Plus Unicode \uxxxx Not implemented octal
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// and hexadecimal, because it's possible to construct invalid unicode code
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// points using them
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STAR_EXCEPTION(ShellParsingException, StarException);
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class ShellParser {
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public:
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ShellParser();
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typedef String::Char Char;
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enum class TokenType {
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Word,
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// TODO: braces, brackets, actual shell stuff
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};
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struct Token {
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TokenType type;
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String token;
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};
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List<Token> tokenize(String const& command);
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StringList tokenizeToStringList(String const& command);
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private:
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void init(String const& command);
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String word();
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Char parseBackslash();
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Char parseUnicodeEscapeSequence(Maybe<Char> previousCodepoint = {});
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bool isSpace(Char letter) const;
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bool isQuote(Char letter) const;
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bool inQuotedString() const;
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bool notDone() const;
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Maybe<Char> current() const;
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Maybe<Char> next();
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Maybe<Char> previous();
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String::const_iterator m_begin;
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String::const_iterator m_current;
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String::const_iterator m_end;
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Char m_quotedType;
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};
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}
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#endif
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