From fc34403018079ea053f26d0a31b7517053c7dd8c Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Thu, 13 Aug 2020 17:33:38 +0200
Subject: Rename ra_assists -> assists

---
 crates/ra_assists/src/handlers/apply_demorgan.rs | 93 ------------------------
 1 file changed, 93 deletions(-)
 delete mode 100644 crates/ra_assists/src/handlers/apply_demorgan.rs

(limited to 'crates/ra_assists/src/handlers/apply_demorgan.rs')

diff --git a/crates/ra_assists/src/handlers/apply_demorgan.rs b/crates/ra_assists/src/handlers/apply_demorgan.rs
deleted file mode 100644
index 1a6fdafda..000000000
--- a/crates/ra_assists/src/handlers/apply_demorgan.rs
+++ /dev/null
@@ -1,93 +0,0 @@
-use syntax::ast::{self, AstNode};
-
-use crate::{utils::invert_boolean_expression, AssistContext, AssistId, AssistKind, Assists};
-
-// Assist: apply_demorgan
-//
-// Apply https://en.wikipedia.org/wiki/De_Morgan%27s_laws[De Morgan's law].
-// This transforms expressions of the form `!l || !r` into `!(l && r)`.
-// This also works with `&&`. This assist can only be applied with the cursor
-// on either `||` or `&&`, with both operands being a negation of some kind.
-// This means something of the form `!x` or `x != y`.
-//
-// ```
-// fn main() {
-//     if x != 4 ||<|> !y {}
-// }
-// ```
-// ->
-// ```
-// fn main() {
-//     if !(x == 4 && y) {}
-// }
-// ```
-pub(crate) fn apply_demorgan(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
-    let expr = ctx.find_node_at_offset::<ast::BinExpr>()?;
-    let op = expr.op_kind()?;
-    let op_range = expr.op_token()?.text_range();
-    let opposite_op = opposite_logic_op(op)?;
-    let cursor_in_range = op_range.contains_range(ctx.frange.range);
-    if !cursor_in_range {
-        return None;
-    }
-
-    let lhs = expr.lhs()?;
-    let lhs_range = lhs.syntax().text_range();
-    let not_lhs = invert_boolean_expression(lhs);
-
-    let rhs = expr.rhs()?;
-    let rhs_range = rhs.syntax().text_range();
-    let not_rhs = invert_boolean_expression(rhs);
-
-    acc.add(
-        AssistId("apply_demorgan", AssistKind::RefactorRewrite),
-        "Apply De Morgan's law",
-        op_range,
-        |edit| {
-            edit.replace(op_range, opposite_op);
-            edit.replace(lhs_range, format!("!({}", not_lhs.syntax().text()));
-            edit.replace(rhs_range, format!("{})", not_rhs.syntax().text()));
-        },
-    )
-}
-
-// Return the opposite text for a given logical operator, if it makes sense
-fn opposite_logic_op(kind: ast::BinOp) -> Option<&'static str> {
-    match kind {
-        ast::BinOp::BooleanOr => Some("&&"),
-        ast::BinOp::BooleanAnd => Some("||"),
-        _ => None,
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    use crate::tests::{check_assist, check_assist_not_applicable};
-
-    #[test]
-    fn demorgan_turns_and_into_or() {
-        check_assist(apply_demorgan, "fn f() { !x &&<|> !x }", "fn f() { !(x || x) }")
-    }
-
-    #[test]
-    fn demorgan_turns_or_into_and() {
-        check_assist(apply_demorgan, "fn f() { !x ||<|> !x }", "fn f() { !(x && x) }")
-    }
-
-    #[test]
-    fn demorgan_removes_inequality() {
-        check_assist(apply_demorgan, "fn f() { x != x ||<|> !x }", "fn f() { !(x == x && x) }")
-    }
-
-    #[test]
-    fn demorgan_general_case() {
-        check_assist(apply_demorgan, "fn f() { x ||<|> x }", "fn f() { !(!x && !x) }")
-    }
-
-    #[test]
-    fn demorgan_doesnt_apply_with_cursor_not_on_op() {
-        check_assist_not_applicable(apply_demorgan, "fn f() { <|> !x || !x }")
-    }
-}
-- 
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