ab21557501
Highlight parts of fn in type errors When a type error arises between two fn items, fn pointers or tuples, highlight only the differing parts of each. Examples: <img width="699" alt="" src="https://user-images.githubusercontent.com/1606434/69487597-ab561600-0e11-11ea-9b4e-d4fd9e91d5dc.png"> <img width="528" alt="" src="https://user-images.githubusercontent.com/1606434/69487207-9033d800-0e0a-11ea-93e3-8c4d002411a5.png"> <img width="468" alt="" src="https://user-images.githubusercontent.com/1606434/69487208-9033d800-0e0a-11ea-92e3-2b2cee120335.png"> <img width="775" alt="" src="https://user-images.githubusercontent.com/1606434/69487209-9033d800-0e0a-11ea-9e68-7f6ed5c8cb08.png">
87 lines
3.0 KiB
Plaintext
87 lines
3.0 KiB
Plaintext
error[E0045]: C-variadic function must have C or cdecl calling convention
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--> $DIR/variadic-ffi-1.rs:5:5
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LL | fn printf(_: *const u8, ...);
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ C-variadics require C or cdecl calling convention
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error[E0060]: this function takes at least 2 parameters but 0 parameters were supplied
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--> $DIR/variadic-ffi-1.rs:16:9
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LL | fn foo(f: isize, x: u8, ...);
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| ----------------------------- defined here
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...
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LL | foo();
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| ^^^^^ expected at least 2 parameters
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error[E0060]: this function takes at least 2 parameters but 1 parameter was supplied
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--> $DIR/variadic-ffi-1.rs:17:9
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LL | fn foo(f: isize, x: u8, ...);
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| ----------------------------- defined here
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...
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LL | foo(1);
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| ^^^^^^ expected at least 2 parameters
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error[E0308]: mismatched types
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--> $DIR/variadic-ffi-1.rs:19:56
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LL | let x: unsafe extern "C" fn(f: isize, x: u8) = foo;
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| ------------------------------------- ^^^ expected non-variadic fn, found variadic function
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| |
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| expected due to this
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= note: expected fn pointer `unsafe extern "C" fn(_, _)`
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found fn item `unsafe extern "C" fn(_, _, ...) {foo}`
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error[E0308]: mismatched types
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--> $DIR/variadic-ffi-1.rs:20:54
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LL | let y: extern "C" fn(f: isize, x: u8, ...) = bar;
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| ----------------------------------- ^^^ expected variadic fn, found non-variadic function
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| |
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| expected due to this
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= note: expected fn pointer `extern "C" fn(_, _, ...)`
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found fn item `extern "C" fn(_, _) {bar}`
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error[E0617]: can't pass `f32` to variadic function
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--> $DIR/variadic-ffi-1.rs:22:19
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LL | foo(1, 2, 3f32);
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| ^^^^ help: cast the value to `c_double`: `3f32 as c_double`
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error[E0617]: can't pass `bool` to variadic function
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--> $DIR/variadic-ffi-1.rs:23:19
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LL | foo(1, 2, true);
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| ^^^^ help: cast the value to `c_int`: `true as c_int`
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error[E0617]: can't pass `i8` to variadic function
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--> $DIR/variadic-ffi-1.rs:24:19
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LL | foo(1, 2, 1i8);
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| ^^^ help: cast the value to `c_int`: `1i8 as c_int`
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error[E0617]: can't pass `u8` to variadic function
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--> $DIR/variadic-ffi-1.rs:25:19
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LL | foo(1, 2, 1u8);
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| ^^^ help: cast the value to `c_uint`: `1u8 as c_uint`
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error[E0617]: can't pass `i16` to variadic function
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--> $DIR/variadic-ffi-1.rs:26:19
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LL | foo(1, 2, 1i16);
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| ^^^^ help: cast the value to `c_int`: `1i16 as c_int`
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error[E0617]: can't pass `u16` to variadic function
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--> $DIR/variadic-ffi-1.rs:27:19
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LL | foo(1, 2, 1u16);
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| ^^^^ help: cast the value to `c_uint`: `1u16 as c_uint`
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error: aborting due to 11 previous errors
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Some errors have detailed explanations: E0045, E0060, E0308, E0617.
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For more information about an error, try `rustc --explain E0045`.
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