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			16 lines
		
	
	
		
			297 B
		
	
	
	
		
			Rust
		
	
	
	
	
	
			
		
		
	
	
			16 lines
		
	
	
		
			297 B
		
	
	
	
		
			Rust
		
	
	
	
	
	
| //@ run-pass
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| 
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| extern crate proc_macro;
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| 
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| //@ proc-macro: is-available.rs
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| extern crate is_available;
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| 
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| fn main() {
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|     let a = proc_macro::is_available();
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|     let b = is_available::from_inside_proc_macro!();
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|     let c = proc_macro::is_available();
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|     assert!(!a);
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|     assert!(b);
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|     assert!(!c);
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| }
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