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doc: add parser operator priority
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- [Literals](specification/tokens/kinds/literals.md)
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- [Brackets](specification/tokens/kinds/brackets.md)
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- [Parser](specification/parser/readme.md)
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- [Examples](examples/readme.md)
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src/specification/parser/readme.md
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src/specification/parser/readme.md
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# Parser
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## Expressionss
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### Operator priority
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| Operator/Expression | Associativity | Parser fn name | Evaluation priority | Implementation |
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| --------------------------------------- | ------------- | -------------- | ------------------- | -------------- |
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| `!` `++` `--` `()` Literals Identifiers | Left to Right | factor | 1 | ✅ |
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| `^` | Left to Left | power | 2 | ✅ |
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| `*` `/` `%` | Left to Right | term | 3 | ✅ |
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| `+` `-` | Left to Right | add_sub | 4 | ✅ |
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| `>>` `<<` | Left to Right | shift | 5 | ❌ |
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| `<` `<=` `>` `>=` `==` `!=` | Left to Right | cmp | 6 | ❌ |
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| `&` | Left to Right | bit_and | 7 | ❌ |
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| <code>\|</code> | Left to Right | bit_or | 8 | ❌ |
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| `==` `!=` `<` `<=` `>` `>=` | Left to Right | cmp | 9 | ❌ |
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| `&&` | Left to Right | logical_and | 10 | ❌ |
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| <code>\|\|</code> | Left to Right | logical_or | 11 | ❌ |
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