b49269ad39
If the method chain goes multi line before the last element, disallow combining the method chain.
48 lines
1.6 KiB
Rust
48 lines
1.6 KiB
Rust
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// A generic trait to abstract the rewriting of an element (of the AST).
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use syntax::codemap::{CodeMap, Span};
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use syntax::parse::ParseSess;
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use Shape;
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use config::{Config, IndentStyle};
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pub trait Rewrite {
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/// Rewrite self into shape.
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fn rewrite(&self, context: &RewriteContext, shape: Shape) -> Option<String>;
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}
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#[derive(Clone)]
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pub struct RewriteContext<'a> {
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pub parse_session: &'a ParseSess,
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pub codemap: &'a CodeMap,
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pub config: &'a Config,
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pub inside_macro: bool,
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// Force block indent style even if we are using visual indent style.
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pub use_block: bool,
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// When `format_if_else_cond_comment` is true, unindent the comment on top
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// of the `else` or `else if`.
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pub is_if_else_block: bool,
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// When rewriting chain, veto going multi line except the last element
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pub force_one_line_chain: bool,
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}
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impl<'a> RewriteContext<'a> {
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pub fn snippet(&self, span: Span) -> String {
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self.codemap.span_to_snippet(span).unwrap()
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}
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/// Return true if we should use block indent style for rewriting function call.
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pub fn use_block_indent(&self) -> bool {
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self.config.fn_call_style() == IndentStyle::Block || self.use_block
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}
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}
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