Struct hir_expand::HirFileId[][src]

pub struct HirFileId(_);
Expand description

Input to the analyzer is a set of files, where each file is identified by FileId and contains source code. However, another source of source code in Rust are macros: each macro can be thought of as producing a “temporary file”. To assign an id to such a file, we use the id of the macro call that produced the file. So, a HirFileId is either a FileId (source code written by user), or a MacroCallId (source code produced by macro).

What is a MacroCallId? Simplifying, it’s a HirFileId of a file containing the call plus the offset of the macro call in the file. Note that this is a recursive definition! However, the size_of of HirFileId is finite (because everything bottoms out at the real FileId) and small (MacroCallId uses the location interning. You can check details here: https://en.wikipedia.org/wiki/String_interning).

Implementations

For macro-expansion files, returns the file original source file the expansion originated from.

If this is a macro call, returns the syntax node of the call.

Return expansion information if it is a macro-expansion file

Indicate it is macro file generated for builtin derive

Return whether this file is an include macro

Return whether this file is an include macro

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