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restricted-shadowing-legacy.rs
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restricted-shadowing-legacy.rs
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// Legend:
// `N` - number of combination, from 0 to 4*4*4=64
// `Outer < Invoc` means that expansion that produced macro definition `Outer`
// is a strict ancestor of expansion that produced macro definition `Inner`.
// `>`, `=` and `Unordered` mean "strict descendant", "same" and
// "not in ordering relation" for parent expansions.
// `+` - possible configuration
// `-` - configuration impossible due to properties of partial ordering
// `-?` - configuration impossible due to block/scope syntax
// `+?` - configuration possible only with legacy scoping
// N | Outer ~ Invoc | Invoc ~ Inner | Outer ~ Inner | Possible |
// 1 | < | < | < | + |
// 2 | < | < | = | - |
// 3 | < | < | > | - |
// 4 | < | < | Unordered | - |
// 5 | < | = | < | + |
// 6 | < | = | = | - |
// 7 | < | = | > | - |
// 8 | < | = | Unordered | - |
// 9 | < | > | < | + |
// 10 | < | > | = | + |
// 11 | < | > | > | -? |
// 12 | < | > | Unordered | -? |
// 13 | < | Unordered | < | + |
// 14 | < | Unordered | = | - |
// 15 | < | Unordered | > | - |
// 16 | < | Unordered | Unordered | -? |
// 17 | = | < | < | + |
// 18 | = | < | = | - |
// 19 | = | < | > | - |
// 20 | = | < | Unordered | - |
// 21 | = | = | < | - |
// 22 | = | = | = | + |
// 23 | = | = | > | - |
// 24 | = | = | Unordered | - |
// 25 | = | > | < | - |
// 26 | = | > | = | - |
// 27 | = | > | > | -? |
// 28 | = | > | Unordered | - |
// 29 | = | Unordered | < | - |
// 30 | = | Unordered | = | - |
// 31 | = | Unordered | > | - |
// 32 | = | Unordered | Unordered | -? |
// 33 | > | < | < | +? |
// 34 | > | < | = | +? |
// 35 | > | < | > | +? |
// 36 | > | < | Unordered | + |
// 37 | > | = | < | - |
// 38 | > | = | = | - |
// 39 | > | = | > | + |
// 40 | > | = | Unordered | - |
// 41 | > | > | < | - |
// 42 | > | > | = | - |
// 43 | > | > | > | -? |
// 44 | > | > | Unordered | - |
// 45 | > | Unordered | < | - |
// 46 | > | Unordered | = | - |
// 47 | > | Unordered | > | -? |
// 48 | > | Unordered | Unordered | -? |
// 49 | Unordered | < | < | -? |
// 50 | Unordered | < | = | - |
// 51 | Unordered | < | > | - |
// 52 | Unordered | < | Unordered | + |
// 53 | Unordered | = | < | - |
// 54 | Unordered | = | = | - |
// 55 | Unordered | = | > | - |
// 56 | Unordered | = | Unordered | + |
// 57 | Unordered | > | < | - |
// 58 | Unordered | > | = | - |
// 59 | Unordered | > | > | + |
// 60 | Unordered | > | Unordered | + |
// 61 | Unordered | Unordered | < | +? |
// 62 | Unordered | Unordered | = | +? |
// 63 | Unordered | Unordered | > | +? |
// 64 | Unordered | Unordered | Unordered | + |
#![feature(decl_macro, rustc_attrs)]
struct Right;
// struct Wrong; // not defined
macro_rules! include { () => {
macro_rules! gen_outer { () => {
macro_rules! m { () => { Wrong } }
}}
macro_rules! gen_inner { () => {
macro_rules! m { () => { Right } }
}}
macro_rules! gen_invoc { () => {
m!()
}}
// -----------------------------------------------------------
fn check1() {
macro_rules! m { () => {} }
macro_rules! gen_gen_inner_invoc { () => {
gen_inner!();
m!(); //~ ERROR `m` is ambiguous
}}
gen_gen_inner_invoc!();
}
fn check5() {
macro_rules! m { () => { Wrong } }
macro_rules! gen_inner_invoc { () => {
macro_rules! m { () => { Right } }
m!(); // OK
}}
gen_inner_invoc!();
}
fn check9() {
macro_rules! m { () => { Wrong } }
macro_rules! gen_inner_gen_invoc { () => {
macro_rules! m { () => { Right } }
gen_invoc!(); // OK
}}
gen_inner_gen_invoc!();
}
fn check10() {
macro_rules! m { () => { Wrong } }
macro_rules! m { () => { Right } }
gen_invoc!(); // OK
}
fn check13() {
macro_rules! m { () => {} }
gen_inner!();
macro_rules! gen_invoc { () => { m!() } } //~ ERROR `m` is ambiguous
gen_invoc!();
}
fn check17() {
macro_rules! m { () => {} }
gen_inner!();
m!(); //~ ERROR `m` is ambiguous
}
fn check22() {
macro_rules! m { () => { Wrong } }
macro_rules! m { () => { Right } }
m!(); // OK
}
fn check36() {
gen_outer!();
gen_inner!();
m!(); //~ ERROR `m` is ambiguous
}
fn check39() {
gen_outer!();
macro_rules! m { () => { Right } }
m!(); // OK
}
fn check52() {
gen_outer!();
macro_rules! gen_gen_inner_invoc { () => {
gen_inner!();
m!(); //~ ERROR `m` is ambiguous
}}
gen_gen_inner_invoc!();
}
fn check56() {
gen_outer!();
macro_rules! gen_inner_invoc { () => {
macro_rules! m { () => { Right } }
m!(); // OK
}}
gen_inner_invoc!();
}
fn check59() {
gen_outer!();
macro_rules! m { () => { Right } }
gen_invoc!(); // OK
}
fn check60() {
gen_outer!();
macro_rules! gen_inner_gen_invoc { () => {
macro_rules! m { () => { Right } }
gen_invoc!(); // OK
}}
gen_inner_gen_invoc!();
}
fn check64() {
gen_outer!();
gen_inner!();
macro_rules! gen_invoc { () => { m!() } } //~ ERROR `m` is ambiguous
gen_invoc!();
}
// -----------------------------------------------------------
// These configurations are only possible with legacy macro scoping
fn check33() {
macro_rules! gen_outer_gen_inner { () => {
macro_rules! m { () => {} }
gen_inner!();
}}
gen_outer_gen_inner!();
m!(); //~ ERROR `m` is ambiguous
}
fn check34() {
macro_rules! gen_outer_inner { () => {
macro_rules! m { () => { Wrong } }
macro_rules! m { () => { Right } }
}}
gen_outer_inner!();
m!(); // OK
}
fn check35() {
macro_rules! gen_gen_outer_inner { () => {
gen_outer!();
macro_rules! m { () => { Right } }
}}
gen_gen_outer_inner!();
m!(); // OK
}
fn check61() {
macro_rules! gen_outer_gen_inner { () => {
macro_rules! m { () => {} }
gen_inner!();
}}
gen_outer_gen_inner!();
macro_rules! gen_invoc { () => { m!() } } //~ ERROR `m` is ambiguous
gen_invoc!();
}
fn check62() {
macro_rules! gen_outer_inner { () => {
macro_rules! m { () => { Wrong } }
macro_rules! m { () => { Right } }
}}
gen_outer_inner!();
gen_invoc!(); // OK
}
fn check63() {
macro_rules! gen_gen_outer_inner { () => {
gen_outer!();
macro_rules! m { () => { Right } }
}}
gen_gen_outer_inner!();
gen_invoc!(); // OK
}
}}
include!();
fn main() {}
// ferrocene-annotations: fls_xa7lp0zg1ol2
// Declarative Macros
//
// ferrocene-annotations: fls_8nzypdu9j3ge
// Metavariables
//
// ferrocene-annotations: fls_wjldgtio5o75
// Macro Expansion
//
// ferrocene-annotations: fls_vnvt40pa48n8
// Macro Invocation
//
// ferrocene-annotations: fls_4apk1exafxii
// Macro Matching
//
// ferrocene-annotations: fls_ym00b6ewf4n3
// Macro Transcription
//
// ferrocene-annotations: fls_n3ktmjqf87qb
// Rule Matching
//
// ferrocene-annotations: fls_qpx6lgapce57
// Token Matching