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Prevent duplicate monomorphization of deserialization impls

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This reduces binary size from 9.7MiB (5.8MiB for just rustbuild code)
to 9.3MiB (5.3MiB for just rustbuild code).

This doesn't reduce compile time in a statistically significant way.
This commit is contained in:
bjorn3 2022-03-03 18:44:02 +01:00
parent a0b4d2136d
commit dca8ff5b25
1 changed files with 5 additions and 1 deletions
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6
src/bootstrap/config.rs
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@ -731,7 +731,11 @@ impl Config {
let contents = let contents =
t!(fs::read_to_string(file), format!("config file {} not found", file.display())); t!(fs::read_to_string(file), format!("config file {} not found", file.display()));
match toml::from_str(&contents) { // Deserialize to Value and then TomlConfig to prevent the Deserialize impl of
// TomlConfig and sub types to be monomorphized 5x by toml.
match toml::from_str(&contents)
.and_then(|table: toml::Value| TomlConfig::deserialize(table))
{
Ok(table) => table, Ok(table) => table,
Err(err) => { Err(err) => {
println!("failed to parse TOML configuration '{}': {}", file.display(), err); println!("failed to parse TOML configuration '{}': {}", file.display(), err);