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DOCS: Add a precedence table to our reference.

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Jeremy Wall 2019-02-25 22:53:42 -06:00
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docsite/site/content/reference/expressions.md
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@ -168,6 +168,32 @@ UCG binary operators follow the typical operator precedence for math. `*` and
`/` are higher precendence than `+` and `-` which are higher precedence than `/` are higher precendence than `+` and `-` which are higher precedence than
any of the comparison operators. any of the comparison operators.
**Precedence table**
Higher values bind tighter than lower values.
<table>
<thead><th>Operator</th><th>Precedence</th><th>Description</th></thead>
<tr><td>==</td><td>1</td><td>Equality Comparison</td></tr>
<tr><td>!=</td><td>1</td><td>Inequality Comparison</td></tr>
<tr><td>>=</td><td>1</td><td>Greater Than or Equal</td></tr>
<tr><td><=</td><td>1</td><td>Less Than or Equal</td></tr>
<tr><td><</td><td>1</td><td>Greater Than</td></tr>
<tr><td>></td><td>1</td><td>Less Than</td></tr>
<tr><td>=~</td><td>1</td><td>Regex Match</td></tr>
<tr><td>!~</td><td>1</td><td>Negated Regex Match</td></tr>
<tr><td>in</td><td>2</td><td>Contains field or item</td></tr>
<tr><td>is</td><td>2</td><td>Type check</td></tr>
<tr><td>+</td><td>3</td><td>Sum or concatenation</td></tr>
<tr><td>-</td><td>3</td><td>Subtraction</td></tr>
<tr><td>*</td><td>4</td><td>Product</td></tr>
<tr><td>/</td><td>4</td><td>Division</td></tr>
<tr><td>%%</td><td>4</td><td>Modulus</td></tr>
<tr><td>&&</td><td>5</td><td>And</td></tr>
<tr><td>||</td><td>5</td><td>Or</td></tr>
<tr><td>.</td><td>6</td><td>Dot Selector</td></tr>
</table>
Type test expressions Type test expressions
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