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Merge pull request #279 from mikesamuel/patch-1

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Clean up language about *IFileElementType*
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Dmitry Jemerov 2020-04-30 09:37:39 +02:00 committed by GitHub
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1 changed files with 2 additions and 2 deletions
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reference_guide/custom_language_support/implementing_parser_and_psi.md
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@ -11,9 +11,9 @@ class.
Each AST node has an associated element type
[`IElementType`](upsource:///platform/core-api/src/com/intellij/psi/tree/IElementType.java)
instance, and the element types are defined by the language plugin.
The top-level node of the AST tree for a file needs to have a special element type, implementing the
The top-level node of the AST tree for a file needs to have a special element type which extends the
[`IFileElementType`](upsource:///platform/core-api/src/com/intellij/psi/tree/IFileElementType.java)
interface.
class.
The AST nodes have a direct mapping to text ranges in the underlying document.
The bottom-most nodes of the AST match individual tokens returned by the lexer, and higher level nodes match multiple-token fragments.