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|
use crate::diagnostics::{Diagnostic, DiagnosticsContext};
// Diagnostic: macro-error
//
// This diagnostic is shown for macro expansion errors.
pub(super) fn macro_error(ctx: &DiagnosticsContext<'_>, d: &hir::MacroError) -> Diagnostic {
Diagnostic::new(
"macro-error",
d.message.clone(),
ctx.sema.diagnostics_display_range(d.node.clone()).range,
)
.experimental()
}
#[cfg(test)]
mod tests {
use crate::{
diagnostics::tests::{check_diagnostics, check_diagnostics_with_config},
DiagnosticsConfig,
};
#[test]
fn builtin_macro_fails_expansion() {
check_diagnostics(
r#"
#[rustc_builtin_macro]
macro_rules! include { () => {} }
include!("doesntexist");
//^^^^^^^^^^^^^^^^^^^^^^^^ failed to load file `doesntexist`
"#,
);
}
#[test]
fn include_macro_should_allow_empty_content() {
let mut config = DiagnosticsConfig::default();
// FIXME: This is a false-positive, the file is actually linked in via
// `include!` macro
config.disabled.insert("unlinked-file".to_string());
check_diagnostics_with_config(
config,
r#"
//- /lib.rs
#[rustc_builtin_macro]
macro_rules! include { () => {} }
include!("foo/bar.rs");
//- /foo/bar.rs
// empty
"#,
);
}
#[test]
fn good_out_dir_diagnostic() {
check_diagnostics(
r#"
#[rustc_builtin_macro]
macro_rules! include { () => {} }
#[rustc_builtin_macro]
macro_rules! env { () => {} }
#[rustc_builtin_macro]
macro_rules! concat { () => {} }
include!(concat!(env!("OUT_DIR"), "/out.rs"));
//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `OUT_DIR` not set, enable "run build scripts" to fix
"#,
);
}
#[test]
fn register_attr_and_tool() {
cov_mark::check!(register_attr);
cov_mark::check!(register_tool);
check_diagnostics(
r#"
#![register_tool(tool)]
#![register_attr(attr)]
#[tool::path]
#[attr]
struct S;
"#,
);
// NB: we don't currently emit diagnostics here
}
#[test]
fn macro_diag_builtin() {
check_diagnostics(
r#"
#[rustc_builtin_macro]
macro_rules! env {}
#[rustc_builtin_macro]
macro_rules! include {}
#[rustc_builtin_macro]
macro_rules! compile_error {}
#[rustc_builtin_macro]
macro_rules! format_args { () => {} }
fn main() {
// Test a handful of built-in (eager) macros:
include!(invalid);
//^^^^^^^^^^^^^^^^^ could not convert tokens
include!("does not exist");
//^^^^^^^^^^^^^^^^^^^^^^^^^^ failed to load file `does not exist`
env!(invalid);
//^^^^^^^^^^^^^ could not convert tokens
env!("OUT_DIR");
//^^^^^^^^^^^^^^^ `OUT_DIR` not set, enable "run build scripts" to fix
compile_error!("compile_error works");
//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ compile_error works
// Lazy:
format_args!();
//^^^^^^^^^^^^^^ no rule matches input tokens
}
"#,
);
}
#[test]
fn macro_rules_diag() {
check_diagnostics(
r#"
macro_rules! m {
() => {};
}
fn f() {
m!();
m!(hi);
//^^^^^^ leftover tokens
}
"#,
);
}
#[test]
fn dollar_crate_in_builtin_macro() {
check_diagnostics(
r#"
#[macro_export]
#[rustc_builtin_macro]
macro_rules! format_args {}
#[macro_export]
macro_rules! arg { () => {} }
#[macro_export]
macro_rules! outer {
() => {
$crate::format_args!( "", $crate::arg!(1) )
};
}
fn f() {
outer!();
} //^^^^^^^^ leftover tokens
"#,
)
}
}
|
