grit-pattern-matcher 0.5.1

Pattern definitions and core matching logic for GritQL
Documentation 
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use super::{
    accumulate::Accumulate,
    and::PrAnd,
    any::PrAny,
    assignment::Assignment,
    call::PrCall,
    equal::Equal,
    functions::{Evaluator, FuncEvaluation},
    maybe::PrMaybe,
    not::PrNot,
    or::PrOr,
    patterns::PatternName,
    predicate_return::PrReturn,
    r#if::PrIf,
    r#match::Match,
    rewrite::Rewrite,
    CallBuiltIn, State,
};
use crate::context::QueryContext;
use core::fmt::Debug;
use grit_util::{error::GritResult, AnalysisLogs};

#[derive(Debug, Clone)]
pub enum Predicate<Q: QueryContext> {
    Call(Box<PrCall<Q>>),
    CallBuiltIn(Box<CallBuiltIn<Q>>),
    Not(Box<PrNot<Q>>),
    If(Box<PrIf<Q>>),
    True,
    False,
    Or(Box<PrOr<Q>>),
    And(Box<PrAnd<Q>>),
    Maybe(Box<PrMaybe<Q>>),
    Any(Box<PrAny<Q>>),
    Rewrite(Box<Rewrite<Q>>),
    Match(Box<Match<Q>>),
    Equal(Box<Equal<Q>>),
    Assignment(Box<Assignment<Q>>),
    Accumulate(Box<Accumulate<Q>>),
    Return(Box<PrReturn<Q>>),
}

impl<Q: QueryContext> PatternName for Predicate<Q> {
    fn name(&self) -> &'static str {
        match self {
            Predicate::Call(call) => call.name(),
            Predicate::CallBuiltIn(call_built_in) => call_built_in.name(),
            Predicate::Not(not) => not.name(),
            Predicate::If(if_) => if_.name(),
            Predicate::True => "TRUE",
            Predicate::False => "FALSE",
            Predicate::Or(or) => or.name(),
            Predicate::And(and) => and.name(),
            Predicate::Maybe(maybe) => maybe.name(),
            Predicate::Any(any) => any.name(),
            Predicate::Rewrite(rewrite) => rewrite.name(),
            Predicate::Match(match_) => match_.name(),
            Predicate::Equal(equal) => equal.name(),
            Predicate::Assignment(assignment) => assignment.name(),
            Predicate::Accumulate(accumulate) => accumulate.name(),
            Predicate::Return(return_) => return_.name(),
        }
    }
}

impl<Q: QueryContext> Evaluator<Q> for Predicate<Q> {
    fn execute_func<'a>(
        &'a self,
        state: &mut State<'a, Q>,
        context: &'a Q::ExecContext<'a>,
        logs: &mut AnalysisLogs,
    ) -> GritResult<FuncEvaluation<Q>> {
        match self {
            Predicate::Call(call) => call.execute_func(state, context, logs),
            Predicate::CallBuiltIn(call_built_in) => {
                call_built_in.execute_func(state, context, logs)
            }
            Predicate::Or(or) => or.execute_func(state, context, logs),
            Predicate::And(and) => and.execute_func(state, context, logs),
            Predicate::Maybe(maybe) => maybe.execute_func(state, context, logs),
            Predicate::Any(any) => any.execute_func(state, context, logs),
            Predicate::Rewrite(rewrite) => rewrite.execute_func(state, context, logs),
            Predicate::Match(match_) => match_.execute_func(state, context, logs),
            Predicate::Equal(equal) => equal.execute_func(state, context, logs),
            Predicate::True => Ok(FuncEvaluation {
                predicator: true,
                ret_val: None,
            }),
            Predicate::False => Ok(FuncEvaluation {
                predicator: false,
                ret_val: None,
            }),
            Predicate::Not(not) => not.execute_func(state, context, logs),
            Predicate::If(if_) => if_.execute_func(state, context, logs),
            Predicate::Assignment(assignment) => assignment.execute_func(state, context, logs),
            Predicate::Accumulate(accumulate) => accumulate.execute_func(state, context, logs),
            Predicate::Return(return_) => return_.execute_func(state, context, logs),
        }
    }
}