spidior 0.2.2

A tool for handling sed-like substitution tasks where pesky source code semantics are getting in the way.
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use self::ast::{Items, Replace};
use std::error::Error;

pub mod ast;
mod parsecommand;
mod parsereplacement;

lalrpop_mod!(reg, "/regexparser/reg.rs");
lalrpop_mod!(set, "/regexparser/set.rs");
lalrpop_mod!(pub query, "/regexparser/query.rs");
lalrpop_mod!(location, "/regexparser/location.rs");

/// For parsing out statements of the form
/// LOCATIONs/REGEX/REPLACEMENT/G
///
/// The difference between this function and `parsecommand::parse`
/// is that the `parsecommand::parse` parses the commands into
/// the portions that make up the command. This function takes
/// things a step further by then parsing out the individual
/// components with their respective parsers.
///
///
/// # Arguments
///
/// * `text` - A string slice that contains the command to be parsed
///
/// # Returns
///
/// A Result<Replace, Box<dyn Error>>, where on success, it returns a
/// Replace containing the LOCATION, REGEX, REPLACEMENT, and
/// whether it is global or not (ends with a g)
pub fn parse(text: &str) -> Result<ast::Replace, Box<dyn Error>> {
    let ru = parsecommand::parse(text)?;
    let location = location::LocationParser::new()
        .parse(&ru.location)
        .map_err(|_| "Failed to parse location")?;
    let find = reg::RegexParser::new()
        .parse(&ru.find)
        .map_err(|_| "Failed to parse regex")?;
    let replace = parsereplacement::parse(&ru.replace)?;
    Ok(Replace {
        location,
        find,
        replace: Box::new(replace),
        global: ru.global,
    })
}

pub fn parse_set(s: String) -> Box<Items> {
    set::ItemsParser::new().parse(&s).unwrap()
}

#[test]
fn parsing_reg() {
    assert!(reg::RegexParser::new().parse("a|b|c").is_ok());
    assert!(reg::RegexParser::new().parse("abc").is_ok());
    assert!(reg::RegexParser::new().parse("ab-c").is_ok());
    assert!(reg::RegexParser::new().parse("a=bc").is_ok());
    assert!(reg::RegexParser::new().parse("\\-").is_ok());
    assert!(reg::RegexParser::new().parse("[a-c]").is_ok());
    assert!(reg::RegexParser::new().parse("\\n").is_ok());
    assert!(reg::RegexParser::new().parse("[[name=x,type=int]]").is_ok());
    assert!(reg::RegexParser::new().parse("[[functions]]").is_ok());
    assert!(reg::RegexParser::new().parse("a|b|(").is_err());
    assert!(reg::RegexParser::new().parse("[[]]").is_err());
}

#[test]
fn parsing_set() {
    assert!(set::ItemsParser::new().parse("abc").is_ok());
    assert!(set::ItemsParser::new().parse("a-c").is_ok());
    assert!(set::ItemsParser::new().parse("abc-d").is_ok());
    assert!(set::ItemsParser::new().parse("ab-cd").is_ok());
    assert!(set::ItemsParser::new().parse("\\n").is_ok());
    assert!(set::ItemsParser::new().parse("name=x,type=int").is_ok());
    assert!(set::ItemsParser::new().parse("functions").is_ok());
    assert!(set::ItemsParser::new().parse("fun").is_ok());
    assert!(set::ItemsParser::new().parse("abc-").is_err());
}

#[test]
fn parsing_query() {
    assert!(query::QueriesParser::new().parse("name=x").is_ok());
    assert!(query::QueriesParser::new().parse("name=x,type=int").is_ok());
    assert!(query::QueriesParser::new().parse("functions").is_ok());
    assert!(query::QueriesParser::new().parse("fun").is_err());
}
#[test]
fn parsing_location() {
    assert!(location::LocationParser::new().parse("<../../../>").is_ok());
    assert!(location::LocationParser::new().parse("{function}").is_ok());
    assert!(location::LocationParser::new().parse("{function}|l1-5").is_ok());
    assert!(location::LocationParser::new().parse("{function}&l1-5").is_ok());
    assert!(location::LocationParser::new().parse("^{function}|l1-5").is_ok());
    assert!(location::LocationParser::new().parse("(^{function}|l1-5)").is_ok());
    assert!(location::LocationParser::new().parse("l0-2").is_ok());
    assert!(location::LocationParser::new().parse("c0-2").is_ok());
    assert!(location::LocationParser::new().parse("%").is_ok());
    assert!(location::LocationParser::new().parse("%:").is_err());
}

#[test]
fn parsing_entire() {
    assert!(parse("%s/westoff/Westhoff").is_err());
    assert!(parse("%s/westoff/Westhoff/").is_ok());
    assert!(parse("<mod.rs>s/jon/John/g").is_ok());
}