fluidattacks-blends-domain 0.2.0

Blends functional core: pure AST graph to syntax graph (no_std)
Documentation 
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//! Counterpart of `blends/syntax/builders/string_literal.py`.

use alloc::borrow::ToOwned;
use alloc::string::String;

use crate::syntax::SyntaxNode;
use crate::syntax::{SyntaxGraphArgs, SyntaxGraphError};
use crate::NodeId;

pub fn build_string_literal_node(
    args: &mut SyntaxGraphArgs<'_>,
    n_id: NodeId,
    value: String,
    c_ids: &[NodeId],
) -> Result<NodeId, SyntaxGraphError> {
    args.syntax_graph.add_node(
        n_id,
        SyntaxNode::Literal {
            value: strip_surrounding_quotes(value),
            value_type: "string".to_owned(),
        },
    );

    for c_id in c_ids {
        let built = args.generic(*c_id)?;
        args.syntax_graph.add_ast_edge(n_id, built);
    }

    Ok(n_id)
}

fn strip_surrounding_quotes(value: String) -> String {
    if value.starts_with(['\'', '"', '`']) {
        let mut chars = value.chars();
        chars.next();
        chars.next_back();
        String::from(chars.as_str())
    } else {
        value
    }
}

#[cfg(test)]
mod tests {
    use super::strip_surrounding_quotes;
    use alloc::borrow::ToOwned;

    #[test]
    fn strips_first_and_last_char_only_when_quoted() {
        assert_eq!(strip_surrounding_quotes("\"doe\"".to_owned()), "doe");
        assert_eq!(strip_surrounding_quotes("'doe'".to_owned()), "doe");
        assert_eq!(strip_surrounding_quotes("`doe`".to_owned()), "doe");
        assert_eq!(strip_surrounding_quotes("doe".to_owned()), "doe");
        assert_eq!(strip_surrounding_quotes("\"doe".to_owned()), "do");
    }
}