Module context 

What kind of code the cursor is in, worked out from the tokens before it. Code being typed rarely parses, so this reads tokens rather than the syntax tree: it only needs to know which blocks, calls and brackets are open and what came last.

Structs

Call 🔒

The call whose argument list the cursor is directly in.

Context 🔒

The cursor’s context, and the call being written around it, if any.

Scanner 🔒

Enums

BlockKind 🔒

What a { … } holds, which decides the statements allowed in it.

Frame 🔒

Slot 🔒

Where the cursor is, and so what may be typed there.

Constants

LOOK_BACK 🔒

How many recent tokens the scanner keeps: enough for for index, item.

Functions

at 🔒

call_slot 🔒

declares_name 🔒

ends_value 🔒

expression_slot 🔒

After an operator or opening bracket an expression may start; after a value, a name being declared or a member ., nothing from the completion list fits.

trailing_block 🔒

What the block after a call to callee holds.