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format_collect

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This commit is contained in:
Johann Hemmann 2024-01-30 14:12:42 +01:00
parent d37f4e0d21
commit 771c6c9271
8 changed files with 54 additions and 39 deletions
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18
crates/syntax/src/ast/make.rs
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@ -9,10 +9,11 @@
//! API should require to assemble every node piecewise. The trick of
//! `parse(format!())` we use internally is an implementation detail -- long
//! term, it will be replaced with direct tree manipulation.
use itertools::Itertools;
use parser::T;
use rowan::NodeOrToken;
use stdx::{format_to, never};
use stdx::{format_to, format_to_acc, never};
use crate::{ast, utils::is_raw_identifier, AstNode, SourceFile, SyntaxKind, SyntaxToken};
@ -759,15 +760,12 @@ pub fn match_arm_with_guard(
}
pub fn match_arm_list(arms: impl IntoIterator<Item = ast::MatchArm>) -> ast::MatchArmList {
let arms_str = arms
.into_iter()
.map(|arm| {
let needs_comma = arm.expr().map_or(true, |it| !it.is_block_like());
let comma = if needs_comma { "," } else { "" };
let arm = arm.syntax();
format!(" {arm}{comma}\n")
})
.collect::<String>();
let arms_str = arms.into_iter().fold(String::new(), |mut acc, arm| {
let needs_comma = arm.expr().map_or(true, |it| !it.is_block_like());
let comma = if needs_comma { "," } else { "" };
let arm = arm.syntax();
format_to_acc!(acc, " {arm}{comma}\n")
});
return from_text(&arms_str);
fn from_text(text: &str) -> ast::MatchArmList {