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Diffstat (limited to 'README.md')
| -rw-r--r-- | README.md | 6 |
1 files changed, 4 insertions, 2 deletions
@@ -384,7 +384,7 @@ Labels are intended to identify elements in directives. An AST doesn't contain l #### `#prec <symbol: Identifier>` -A `#prec` directive gives alternatives the same precedence and associativety as `symbol`. To be precise, precedence and associativity are given to the right-most symbol in an alternative, not to an alternative. +A `#prec` directive gives alternatives the same precedence as `symbol`. See [Operator precedence and associativity](#operator-precedence-and-associativity) section for more details on the `#prec` directive. @@ -499,7 +499,9 @@ foobar `%left` and `%right` allow you to define precedence and associativiry of symbols. `%left`/`%right` each assign the left/right associativity to symbols. -`#prec` directive assigns the same precedence and associativity as a specified symbol to an alternative. +When the right-most terminal symbol of an alternative has precedence or associativity defined explicitly, the alternative inherits its precedence and associativity. + +`#prec` directive assigns the same precedence as a specified symbol to an alternative. The grammar for simple four arithmetic operations and assignment expression can be defined as follows: |