Module macros 

Macro system for CEL parser.

Macros in CEL are syntactic transformations that expand at parse time. They transform specific call patterns (like list.all(x, cond)) into expanded AST nodes (like Comprehension).

This module provides:

• Macro - Definition of a single macro
• MacroRegistry - Collection of macros with lookup by key
• MacroExpander - The expansion function type
• MacroContext - Context passed to expanders for node creation

Architecture

Macros are keyed by name:arg_count:is_receiver (e.g., "all:2:true"). This allows separate definitions for different argument counts. Lookup tries the exact key first, then falls back to a var-arg key.

Structs

Macro

Definition of a single macro.

MacroContext

Context provided to macro expanders for creating AST nodes.

MacroRegistry

Registry of macros with efficient lookup.

Enums

ArgCount

Specifies the expected argument count for a macro.

MacroExpansion

Result of macro expansion.

MacroStyle

Indicates whether a macro is called as a global function or as a method on a receiver.

Statics

STANDARD_MACROS

Standard CEL macros.

Type Aliases

MacroExpander

Type alias for macro expander functions.