ri > Sass::Tree

= Sass::Tree

(from /home/chedong/.local/share/rdoc)
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A namespace for nodes in the Sass parse tree.

The Sass parse tree has three states: dynamic, static Sass, and static
CSS.

When it's first parsed, a Sass document is in the dynamic state. It has
nodes for mixin definitions and `@for` loops and so forth, in addition
to nodes for CSS rules and properties. Nodes that only appear in this
state are called **dynamic nodes**.

{Tree::Visitors::Perform} creates a static Sass tree, which is
different. It still has nodes for CSS rules and properties but it
doesn't have any dynamic-generation-related nodes. The nodes in this
state are in a similar structure to the Sass document: rules and
properties are nested beneath one another, although the {Tree::RuleNode}
selectors are already in their final state. Nodes that can be in this
state or in the dynamic state are called **static nodes**; nodes that
can only be in this state are called **solely static nodes**.

{Tree::Visitors::Cssize} is then used to create a static CSS tree. This
is like a static Sass tree, but the structure exactly mirrors that of
the generated CSS. Rules and properties can't be nested beneath one
another in this state.

Finally, {Tree::Visitors::ToCss} can be called on a static CSS tree to
get the actual CSS code as a string.









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