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LibJS: Parser refactored to use constexpr precedence table

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Replaced implementation dependent on HashMap with a constexpr PrecedenceTable
based on array lookup.
This commit is contained in:
Muhammad Zahalqa 2020-08-18 19:46:36 +03:00 • committed by Andreas Kling
parent b36ac88349
commit 5a2ec86048
3 changed files with 116 additions and 102 deletions
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10
Libraries/LibJS/Token.h
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@ -153,7 +153,9 @@ enum class TokenType {
#define __ENUMERATE_JS_TOKEN(x) x,
ENUMERATE_JS_TOKENS
#undef __ENUMERATE_JS_TOKEN
_COUNT_OF_TOKENS
};
constexpr size_t cs_num_of_js_tokens = static_cast<size_t>(TokenType::_COUNT_OF_TOKENS);
class Token {
public:
@ -196,11 +198,3 @@ private:
};
}
namespace AK {
template<>
struct Traits<JS::TokenType> : public GenericTraits<JS::TokenType> {
static constexpr bool is_trivial() { return true; }
static unsigned hash(JS::TokenType t) { return int_hash((int)t); }
};
}