Package com.intellij.psi.tree

Interface IReparseableLeafElementType<T extends ASTNode>

public interface IReparseableLeafElementType<T extends ASTNode>

An interface to be implemented by IElementType instances for leaf AST nodes, providing a possibility for quick reparse.

See Also:

reparseLeaf(ASTNode, CharSequence)

Method Summary

Modifier and Type	Method and Description
T	reparseLeaf(T leaf, java.lang.CharSequence newText) If the IDE detects that the whole changed range to be reparsed is contained within one leaf that has such element type, this method is called.

Method Detail

reparseLeaf

T reparseLeaf(T leaf,
              java.lang.CharSequence newText)

If the IDE detects that the whole changed range to be reparsed is contained within one leaf that has such element type, this method is called. It should analyze the provided new leaf text, check whether this text conforms with the language rules, and (if yes) return a new leaf of the same type with the new text. The reparse process would then just replace the old leaf with the new one. Otherwise, null should be returned, and a full-blown reparse process will happen instead.

Parameters:

leaf - the leaf element where the text change has occurred

newText - the updated text inside the leaf's range

Returns:

a replacement leaf with newText text, if it's correct to do such replacement, or null otherwise