Crate wagon_macros

Procedural macros for use in the WAGon suite of libraries.

It would make more sense to put these in the wagon-utils crate. But Rust does not allow use to export procedural macros and regular functions from the same crate. So here we are.

Macros

match_error

Automatically return a parse error if an unexpected token is encountered.

unspanned_tree

Given a hand-written, complete [wagon-parser::Wag] without any Span information, creates a proper one with dummy Span data.

Attribute Macros

inherit_from_base

A procedural macro to extend lexers from a base lexer. Used by wagon-lexer::math::Math and wagon-lexer::productions::Productions.

new_unspanned

Given a struct/enum with wagon-parser::SpannableNode fields, creates constructors which do not require any SpannableNode wrapping.

Derive Macros

TokenMapper

Derive macro for the wagon-parser::helpers::TokenMapper trait.

ValueAdd

Automatically derive this operation for wagon-value::Valueable types.

ValueDiv

Automatically derive this operation for wagon-value::Valueable types.

ValueMul

Automatically derive this operation for wagon-value::Valueable types.

ValueOps

Automatically derive all value operations

ValuePow

Automatically derive this operation for wagon-value::Valueable types.

ValueRem

Automatically derive this operation for wagon-value::Valueable types.

ValueSub

Automatically derive this operation for wagon-value::Valueable types.