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LibCpp: Understand preprocessor macro definition and invocation

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The preprocessor now understands when a function-like macro is defined,
and can also parse calls to such macros.

The actual evaluation of function-like macros will be done in a
separate commit.
This commit is contained in:
Itamar 2021-08-11 22:31:43 +03:00 • committed by Andreas Kling
parent c7d3a7789c
commit 8505fcb8ae
4 changed files with 155 additions and 31 deletions
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24
Userland/Libraries/LibCpp/Preprocessor.h
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@ -24,17 +24,20 @@ public:
Vector<Token> process_and_lex();
Vector<StringView> included_paths() const { return m_included_paths; }
struct DefinedValue {
struct Definition {
String key;
Vector<String> parameters;
String value;
FlyString filename;
size_t line { 0 };
size_t column { 0 };
};
using Definitions = HashMap<StringView, DefinedValue>;
using Definitions = HashMap<String, Definition>;
struct Substitution {
Token original_token;
DefinedValue defined_value;
Vector<Token> original_tokens;
Definition defined_value;
String processed_value;
};
Definitions const& definitions() const { return m_definitions; }
@ -50,7 +53,18 @@ private:
PreprocessorKeyword handle_preprocessor_line(StringView const&);
void handle_preprocessor_keyword(StringView const& keyword, GenericLexer& line_lexer);
void process_line(StringView const& line);
void do_substitution(Token const& replaced_token, DefinedValue const&);
size_t do_substitution(Vector<Token> const& tokens, size_t token_index, Definition const&);
Optional<Definition> create_definition(StringView line);
struct MacroCall {
Token name;
struct Argument {
Vector<Token> tokens;
};
Vector<Argument> arguments;
size_t end_token_index { 0 };
};
Optional<MacroCall> parse_macro_call(Vector<Token> const& tokens, size_t token_index);
String m_filename;
String m_program;