1: <?php
 2: namespace Pharborist;
 3: 
 4: use Pharborist\Types\ArrayElementNode;
 5: 
 6: /**
 7:  * Interface for nodes that represent expressions.
 8:  *
 9:  * An expression is any snippet of code which represents or produces a value.
10:  * Expressions include, but aren't limited to:
11:  *
12:  * - Variables: `$mork`
13:  * - Assignments: `$foo = $bar`
14:  * - Arithmetic: `$a = $b + $c`
15:  * - Function or method calls: `foo(); $foo->baz();`
16:  * - Logical expressions: `($a && $b)`
17:  * - Function call arguments: `foo(--$baz)`
18:  * - Comparisons: `$a > $b`
19:  *
20:  * Expressions are "smaller" than statements, in the sense that a statement
21:  * is usually composed of least one expression. Expressions can contain other
22:  * expressions -- a nested function call, for instance. Any node that implements
23:  * this interface is considered by PHP to be an expression.
24:  */
25: interface ExpressionNode extends NodeInterface, ArrayElementNode {
26: 
27: }
28: