rrubocop 0.7.2

Fast RuboCop-compatible Ruby linter in Rust (tree-sitter). No Ruby for linting; ERB configs need ruby.
Documentation 
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//! Style/StringLiterals — breadth-first tree-sitter port.

use tree_sitter::Node;

use crate::cop::style::heuristics::matches_string_literals;
use crate::cop::{Cop, CopConfig};
use crate::diagnostic::Diagnostic;
use crate::parse::source::SourceFile;

pub struct StringLiterals;

impl Cop for StringLiterals {
    fn name(&self) -> &'static str {
        "Style/StringLiterals"
    }

    fn supports_autocorrect(&self) -> bool {
        true
    }

    fn interested_node_kinds(&self) -> &'static [&'static str] {
        &["string", "string_content"]
    }

    fn check_node(
        &self,
        source: &SourceFile,
        node: Node<'_>,
        config: &CopConfig,
        diagnostics: &mut Vec<Diagnostic>,
        _corrections: Option<&mut Vec<crate::correction::Correction>>,
    ) {
        if !matches_string_literals(source, node, config) {
            return;
        }
        let style = config.get_str("EnforcedStyle", "single_quotes");
        let msg = if style == "double_quotes" {
            "Prefer double-quoted strings unless you need single quotes to avoid extra backslashes for escaping."
        } else {
            "Prefer single-quoted strings when you don't need string interpolation or special symbols."
        };
        let (line, col) = source.offset_to_line_col(node.start_byte());
        diagnostics.push(self.diagnostic(source, line, col, msg.to_string()));
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    crate::cop_fixture_tests!(StringLiterals, "cops/style/string_literals");
}