hamelin_sql 0.3.10

SQL generation utilities for Hamelin query language
Documentation 
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//! Translation implementations for unary operators

use crate::TranslationRegistry;
use crate::{range_builder::RangeBuilder, utils::direct_unary_operator_translation};
use hamelin_lib::func::defs::{UnaryMinus, UnaryPlus, UnaryRangePostfix, UnaryRangePrefix};

/// Register all unary operator translations.
pub fn register(registry: &mut TranslationRegistry) {
    // UnaryMinus uses direct unary operator translation (-x)
    registry.register::<UnaryMinus>(direct_unary_operator_translation);

    // UnaryPlus uses direct unary operator translation (+x)
    registry.register::<UnaryPlus>(direct_unary_operator_translation);

    // UnaryRangePrefix: ..x creates a range with upper bound only
    registry.register::<UnaryRangePrefix>(|_, mut bindings| {
        let x = bindings.take()?;
        let rb = RangeBuilder::default()
            .with_end(x.sql, x.typ.to_sql()?)
            .build();
        Ok(rb)
    });

    // UnaryRangePostfix: x.. creates a range with lower bound only
    registry.register::<UnaryRangePostfix>(|_, mut bindings| {
        let x = bindings.take()?;
        let rb = RangeBuilder::default()
            .with_begin(x.sql, x.typ.to_sql()?)
            .build();
        Ok(rb)
    });
}