More keyword paring and migration in runtime, docs, code modes.
This commit is contained in:
Graydon Hoare
parent
f0565be49a
commit
d3c6119a7a
@ -23,8 +23,10 @@ Version 0.3 (June 2012) - not yet!
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* Type reflection
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* Removal of various obsolete features
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* Keywords: be, prove, syntax, note, mutable, do, bind
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* Constructs: do-while loops, fn binding, resources
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* Keywords: 'be', 'prove', 'syntax', 'note', 'mutable',
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'bind', 'crust', 'native' (now 'extern')
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* Constructs: do-while loops ('do' repurposed),
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fn binding, resources
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* Compiler reorganization
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* Syntax-layer of compiler split into separate crate
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@ -39,7 +41,7 @@ Version 0.3 (June 2012) - not yet!
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* Extensive work on libuv interface
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* Much vector code moved to libraries
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* Syntax extensions: #line, #col, #file, #mod,
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#stringify, #include, #include_str, #include_bin.
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#stringify, #include, #include_str, #include_bin
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* Tool improvements
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* Cargo automatically resolves dependencies
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@ -7,12 +7,12 @@ CodeMirror.defineMode("rust", function() {
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"let": "let", "fn": "fn", "for": "for", "alt": "alt", "iface": "iface",
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"impl": "impl", "type": "type", "enum": "enum", "mod": "mod",
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"as": "op", "true": "atom", "false": "atom", "assert": "op", "check": "op",
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"claim": "op", "native": "ignore", "unsafe": "ignore", "import": "else-style",
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"claim": "op", "extern": "ignore", "unsafe": "ignore", "import": "else-style",
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"export": "else-style", "copy": "op", "log": "op", "log_err": "op",
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"use": "op", "bind": "op", "self": "atom"
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};
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var typeKeywords = function() {
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var keywords = {"fn": "fn", "block": "fn", "obj": "obj"};
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var keywords = {"fn": "fn"};
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var atoms = "bool uint int i8 i16 i32 i64 u8 u16 u32 u64 float f32 f64 str char".split(" ");
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for (var i = 0, e = atoms.length; i < e; ++i) keywords[atoms[i]] = "atom";
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return keywords;
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87
doc/rust.md
87
doc/rust.md
@ -210,17 +210,16 @@ The keywords in [source files](#source-files) are the following strings:
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~~~~~~~~ {.keyword}
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alt assert
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be break
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check claim class const cont copy crust
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break
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check claim class const cont copy
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drop
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else enum export
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else enum export extern
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fail false fn for
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if iface impl import
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let log loop
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mod mut
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native new
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pure
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resource ret
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ret
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true trait type
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unchecked unsafe
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while
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@ -575,7 +574,7 @@ of [attributes](#attributes) attached to it.
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~~~~~~~~ {.ebnf .gram}
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item : mod_item | fn_item | type_item | enum_item
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| res_item | iface_item | impl_item | native_mod_item ;
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| res_item | iface_item | impl_item | foreign_mod_item ;
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~~~~~~~~
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An _item_ is a component of a crate; some module items can be defined in crate
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@ -1039,29 +1038,29 @@ Similarly, [interface](#interfaces) bounds can be specified for type
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parameters to allow methods of that interface to be called on values
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of that type.
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#### Crust functions
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#### Extern functions
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Crust functions are part of Rust's foreign function interface,
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providing the opposite functionality to [native modules](#native-modules).
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Whereas native modules allow Rust code to call foreign
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code, crust functions allow foreign code to call Rust code. They are
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defined the same as any other Rust function, except that they are
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prepended with the `crust` keyword.
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Extern functions are part of Rust's foreign function interface, providing
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the opposite functionality to [foreign modules](#foreign-modules). Whereas
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foreign modules allow Rust code to call foreign code, extern functions with
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bodies defined in Rust code _can be called by foreign code_. They are defined the
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same as any other Rust function, except that they are prepended with the
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`extern` keyword.
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~~~
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crust fn new_vec() -> [int] { [] }
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extern fn new_vec() -> [int] { [] }
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~~~
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Crust functions may not be called from Rust code, but their value
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Extern functions may not be called from Rust code, but their value
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may be taken as an unsafe `u8` pointer.
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~~~
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# crust fn new_vec() -> [int] { [] }
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# extern fn new_vec() -> [int] { [] }
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let fptr: *u8 = new_vec;
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~~~
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The primary motivation of crust functions is to create callbacks
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for native functions that expect to receive function pointers.
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The primary motivation of extern functions is to create callbacks
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for foreign functions that expect to receive function pointers.
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### Type definitions
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@ -1298,49 +1297,51 @@ impl of seq<bool> for u32 {
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}
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~~~~
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### Native modules
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### Foreign modules
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~~~ {.ebnf .gram}
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native_mod_item : "native mod" ident '{' native_mod '} ;
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native_mod : [ native_fn ] * ;
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foreign_mod_item : "extern mod" ident '{' foreign_mod '} ;
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foreign_mod : [ foreign_fn ] * ;
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~~~
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Native modules form the basis for Rust's foreign function interface. A native
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module describes functions in external, non-Rust libraries. Functions within
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native modules are declared the same as other Rust functions, with the exception
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that they may not have a body and are instead terminated by a semi-colon.
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Foreign modules form the basis for Rust's foreign function interface. A
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foreign module describes functions in external, non-Rust
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libraries. Functions within foreign modules are declared the same as other
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Rust functions, with the exception that they may not have a body and are
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instead terminated by a semi-colon.
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~~~
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# import libc::{c_char, FILE};
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# #[nolink]
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native mod c {
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extern mod c {
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fn fopen(filename: *c_char, mode: *c_char) -> *FILE;
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}
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~~~
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Functions within native modules may be called by Rust code as it would any
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Functions within foreign modules may be called by Rust code as it would any
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normal function and the Rust compiler will automatically translate between
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the Rust ABI and the native ABI.
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the Rust ABI and the foreign ABI.
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The name of the native module has special meaning to the Rust compiler in
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The name of the foreign module has special meaning to the Rust compiler in
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that it will treat the module name as the name of a library to link to,
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performing the linking as appropriate for the target platform. The name
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given for the native module will be transformed in a platform-specific
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way to determine the name of the library. For example, on Linux the name
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of the native module is prefixed with 'lib' and suffixed with '.so', so
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the native mod 'rustrt' would be linked to a library named 'librustrt.so'.
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given for the foreign module will be transformed in a platform-specific way
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to determine the name of the library. For example, on Linux the name of the
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foreign module is prefixed with 'lib' and suffixed with '.so', so the
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foreign mod 'rustrt' would be linked to a library named 'librustrt.so'.
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A number of [attributes](#attributes) control the behavior of native mods.
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A number of [attributes](#attributes) control the behavior of foreign
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modules.
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By default native mods assume that the library they are calling use
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the standard C "cdecl" ABI. Other ABI's may be specified using the `abi`
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By default foreign modules assume that the library they are calling use the
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standard C "cdecl" ABI. Other ABI's may be specified using the `abi`
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attribute as in
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~~~{.xfail-test}
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// Interface to the Windows API
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#[abi = "stdcall"]
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native mod kernel32 { }
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extern mod kernel32 { }
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~~~
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The `link_name` attribute allows the default library naming behavior to
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@ -1348,13 +1349,13 @@ be overriden by explicitly specifying the name of the library.
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~~~{.xfail-test}
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#[link_name = "crypto"]
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native mod mycrypto { }
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extern mod mycrypto { }
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~~~
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The `nolink` attribute tells the Rust compiler not to perform any linking
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for the native module. This is particularly useful for creating native
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mods for libc, which tends to not follow standard library naming conventions
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and is linked to all Rust programs anyway.
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for the foreign module. This is particularly useful for creating foreign
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modules for libc, which tends to not follow standard library naming
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conventions and is linked to all Rust programs anyway.
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## Attributes
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@ -1752,8 +1753,8 @@ A type cast expression is denoted with the binary operator `as`.
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Executing an `as` expression casts the value on the left-hand side to the type
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on the right-hand side.
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A numeric value can be cast to any numeric type. A native pointer value can
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be cast to or from any integral type or native pointer type. Any other cast
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A numeric value can be cast to any numeric type. An unsafe pointer value can
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be cast to or from any integral type or unsafe pointer type. Any other cast
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is unsupported and will fail to compile.
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An example of an `as` expression:
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@ -2106,7 +2106,7 @@ OpenSSL libraries installed, it should 'just work'.
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~~~~ {.xfail-test}
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use std;
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native mod crypto {
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extern mod crypto {
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fn SHA1(src: *u8, sz: uint, out: *u8) -> *u8;
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}
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@ -2128,20 +2128,23 @@ fn main(args: [str]) {
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}
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~~~~
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## Native modules
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## Foreign modules
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Before we can call `SHA1`, we have to declare it. That is what this
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part of the program is responsible for:
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~~~~ {.xfail-test}
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native mod crypto {
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extern mod crypto {
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fn SHA1(src: *u8, sz: uint, out: *u8) -> *u8;
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}
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~~~~
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A `native` module declaration tells the compiler that the program
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should be linked with a library by that name, and that the given list
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of functions are available in that library.
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An `extern` module declaration containing function signatures introduces
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the functions listed as _foreign functions_, that are implemented in some
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other language (usually C) and accessed through Rust's foreign function
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interface (FFI). An extern module like this is called a foreign module, and
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implicitly tells the compiler to link with a library with the same name as
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the module, and that it will find the foreign functions in that library.
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In this case, it'll change the name `crypto` to a shared library name
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in a platform-specific way (`libcrypto.so` on Linux, for example), and
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@ -2150,38 +2153,38 @@ actual library, you can use the `"link_name"` attribute, like:
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~~~~ {.xfail-test}
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#[link_name = "crypto"]
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native mod something {
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extern mod something {
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fn SHA1(src: *u8, sz: uint, out: *u8) -> *u8;
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}
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~~~~
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## Native calling conventions
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## Foreign calling conventions
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Most native C code use the cdecl calling convention, so that is what
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Rust uses by default when calling native functions. Some native functions,
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most notably the Windows API, use other calling conventions, so Rust
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provides a way to hint to the compiler which is expected by using
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the `"abi"` attribute:
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Most foreign code will be C code, which usually uses the `cdecl` calling
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convention, so that is what Rust uses by default when calling foreign
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functions. Some foreign functions, most notably the Windows API, use other
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calling conventions, so Rust provides a way to hint to the compiler which
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is expected by using the `"abi"` attribute:
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~~~~
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#[cfg(target_os = "win32")]
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#[abi = "stdcall"]
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native mod kernel32 {
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extern mod kernel32 {
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fn SetEnvironmentVariableA(n: *u8, v: *u8) -> int;
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}
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~~~~
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The `"abi"` attribute applies to a native mod (it can not be applied
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The `"abi"` attribute applies to a foreign module (it can not be applied
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to a single function within a module), and must be either `"cdecl"`
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or `"stdcall"`. Other conventions may be defined in the future.
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## Unsafe pointers
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The native `SHA1` function is declared to take three arguments, and
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The foreign `SHA1` function is declared to take three arguments, and
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return a pointer.
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~~~~ {.xfail-test}
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# native mod crypto {
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# extern mod crypto {
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fn SHA1(src: *u8, sz: uint, out: *u8) -> *u8;
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# }
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~~~~
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@ -2295,7 +2298,7 @@ use std;
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type timeval = {mut tv_sec: uint,
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mut tv_usec: uint};
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#[nolink]
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native mod libc {
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extern mod libc {
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fn gettimeofday(tv: *timeval, tz: *()) -> i32;
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}
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fn unix_time_in_microseconds() -> u64 unsafe {
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@ -2307,8 +2310,8 @@ fn unix_time_in_microseconds() -> u64 unsafe {
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# fn main() { assert #fmt("%?", unix_time_in_microseconds()) != ""; }
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~~~~
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The `#[nolink]` attribute indicates that there's no native library to link
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in. The standard C library is already linked with Rust programs.
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The `#[nolink]` attribute indicates that there's no foreign library to
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link in. The standard C library is already linked with Rust programs.
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A `timeval`, in C, is a struct with two 32-bit integers. Thus, we
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define a record type with the same contents, and declare
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@ -52,21 +52,21 @@
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(defvar rust-punc-chars "()[].,{}:;")
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(defvar rust-value-keywords
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(let ((table (make-hash-table :test 'equal)))
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(dolist (word '("mod" "type" "resource" "fn" "enum" "iface" "impl"))
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(dolist (word '("mod" "const" "class" "type"
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"trait" "fn" "enum" "iface"
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"impl"))
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(puthash word 'def table))
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(dolist (word '("assert"
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"be" "break"
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"check" "claim" "class" "const" "cont" "copy" "crust"
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"break"
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"check" "claim" "cont" "copy"
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"drop"
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"else" "export"
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"else" "export" "extern"
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"fail" "for"
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"if" "import"
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"let" "log" "loop"
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"mut"
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"native" "new"
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"new"
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"pure"
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"ret"
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"trait"
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"unchecked" "unsafe"
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"while"))
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(puthash word t table))
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@ -14,21 +14,21 @@ if !exists("main_syntax")
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let main_syntax='rust'
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endif
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syn keyword rustKeyword alt as assert be bind break
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syn keyword rustKeyword check claim cont const copy else export fail
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syn keyword rustKeyword for if impl import in inline lambda let log
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syn keyword rustKeyword loop mod mut mutable native note of prove pure
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syn keyword rustKeyword ret self syntax to unchecked
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syn keyword rustKeyword alt as assert break
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syn keyword rustKeyword check claim cont const copy else export extern fail
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syn keyword rustKeyword for if impl import in let log
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syn keyword rustKeyword loop mod mut of pure
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syn keyword rustKeyword ret self to unchecked
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syn keyword rustKeyword unsafe use while with
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" FIXME: Scoped impl's name is also fallen in this category
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syn keyword rustKeyword mod iface resource class enum type nextgroup=rustIdentifier skipwhite
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syn keyword rustKeyword mod iface trait class enum type nextgroup=rustIdentifier skipwhite
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syn keyword rustKeyword fn nextgroup=rustFuncName skipwhite
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syn match rustIdentifier "\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*" display contained
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syn match rustFuncName "\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*" display contained
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" Reserved words
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syn keyword rustKeyword m32 m64 m128 f80 f16 f128 class trait
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syn keyword rustKeyword m32 m64 m128 f80 f16 f128
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syn keyword rustType any int uint float char bool u8 u16 u32 u64 f32
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syn keyword rustType f64 i8 i16 i32 i64 str
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@ -285,7 +285,7 @@ fn restricted_keyword_table() -> hashmap<str, ()> {
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let keys = [
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"alt",
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"assert",
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"be", "break",
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"break",
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"check", "claim", "class", "const", "cont", "copy", "crust",
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"do", "drop",
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"else", "enum", "export", "extern",
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@ -1,4 +1,4 @@
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/* Native builtins. */
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/* Foreign builtins. */
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#include "rust_sched_loop.h"
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#include "rust_task.h"
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@ -10,7 +10,7 @@
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* Managing the dynamically resizing list of Rust stack segments
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* Switching between running Rust code on the Rust segmented stack and
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native C code on large stacks owned by the scheduler
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foreign C code on large stacks owned by the scheduler
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The lifetime of a rust_task object closely mirrors that of a running Rust
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task object, but they are not identical. In particular, the rust_task is an
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@ -40,7 +40,7 @@ extern "C" void record_sp_limit(void *limit);
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/**********************************************************************
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* Switches to the C-stack and invokes |fn_ptr|, passing |args| as argument.
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* This is used by the C compiler to call native functions and by other
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* This is used by the C compiler to call foreign functions and by other
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* upcalls to switch to the C stack. The return value is passed through a
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* field in the args parameter. This upcall is specifically for switching
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* to the shim functions generated by rustc.
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@ -58,7 +58,7 @@ upcall_call_shim_on_c_stack(void *args, void *fn_ptr) {
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task->call_on_c_stack(args, fn_ptr);
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} catch (...) {
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// Logging here is not reliable
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assert(false && "Native code threw an exception");
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assert(false && "Foreign code threw an exception");
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}
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task->record_stack_limit();
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@ -8,11 +8,11 @@
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#include "rust_log.h"
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#include "uv.h"
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// crust fn pointers
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typedef void (*crust_async_op_cb)(uv_loop_t* loop, void* data,
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// extern fn pointers
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typedef void (*extern_async_op_cb)(uv_loop_t* loop, void* data,
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uv_async_t* op_handle);
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typedef void (*crust_simple_cb)(uint8_t* id_buf, void* loop_data);
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typedef void (*crust_close_cb)(uint8_t* id_buf, void* handle,
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typedef void (*extern_simple_cb)(uint8_t* id_buf, void* loop_data);
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typedef void (*extern_close_cb)(uint8_t* id_buf, void* handle,
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||||
void* data);
|
||||
|
||||
// data types
|
||||
@ -20,8 +20,8 @@ typedef void (*crust_close_cb)(uint8_t* id_buf, void* handle,
|
||||
|
||||
struct handle_data {
|
||||
uint8_t id_buf[RUST_UV_HANDLE_LEN];
|
||||
crust_simple_cb cb;
|
||||
crust_close_cb close_cb;
|
||||
extern_simple_cb cb;
|
||||
extern_close_cb close_cb;
|
||||
};
|
||||
|
||||
// helpers
|
||||
@ -37,7 +37,7 @@ current_kernel_free(void* ptr) {
|
||||
}
|
||||
|
||||
static handle_data*
|
||||
new_handle_data_from(uint8_t* buf, crust_simple_cb cb) {
|
||||
new_handle_data_from(uint8_t* buf, extern_simple_cb cb) {
|
||||
handle_data* data = (handle_data*)current_kernel_malloc(
|
||||
sizeof(handle_data),
|
||||
"handle_data");
|
||||
@ -48,39 +48,39 @@ new_handle_data_from(uint8_t* buf, crust_simple_cb cb) {
|
||||
|
||||
// libuv callback impls
|
||||
static void
|
||||
native_crust_async_op_cb(uv_async_t* handle, int status) {
|
||||
crust_async_op_cb cb = (crust_async_op_cb)handle->data;
|
||||
foreign_extern_async_op_cb(uv_async_t* handle, int status) {
|
||||
extern_async_op_cb cb = (extern_async_op_cb)handle->data;
|
||||
void* loop_data = handle->loop->data;
|
||||
cb(handle->loop, loop_data, handle);
|
||||
}
|
||||
|
||||
static void
|
||||
native_async_cb(uv_async_t* handle, int status) {
|
||||
foreign_async_cb(uv_async_t* handle, int status) {
|
||||
handle_data* handle_d = (handle_data*)handle->data;
|
||||
void* loop_data = handle->loop->data;
|
||||
handle_d->cb(handle_d->id_buf, loop_data);
|
||||
}
|
||||
|
||||
static void
|
||||
native_timer_cb(uv_timer_t* handle, int status) {
|
||||
foreign_timer_cb(uv_timer_t* handle, int status) {
|
||||
handle_data* handle_d = (handle_data*)handle->data;
|
||||
void* loop_data = handle->loop->data;
|
||||
handle_d->cb(handle_d->id_buf, loop_data);
|
||||
}
|
||||
|
||||
static void
|
||||
native_close_cb(uv_handle_t* handle) {
|
||||
foreign_close_cb(uv_handle_t* handle) {
|
||||
handle_data* data = (handle_data*)handle->data;
|
||||
data->close_cb(data->id_buf, handle, handle->loop->data);
|
||||
}
|
||||
|
||||
static void
|
||||
native_close_op_cb(uv_handle_t* op_handle) {
|
||||
foreign_close_op_cb(uv_handle_t* op_handle) {
|
||||
current_kernel_free(op_handle);
|
||||
// uv_run() should return after this..
|
||||
}
|
||||
|
||||
// native fns bound in rust
|
||||
// foreign fns bound in rust
|
||||
extern "C" void
|
||||
rust_uv_free(void* ptr) {
|
||||
current_kernel_free(ptr);
|
||||
@ -122,11 +122,11 @@ rust_uv_loop_set_data(uv_loop_t* loop, void* data) {
|
||||
}
|
||||
|
||||
extern "C" void*
|
||||
rust_uv_bind_op_cb(uv_loop_t* loop, crust_async_op_cb cb) {
|
||||
rust_uv_bind_op_cb(uv_loop_t* loop, extern_async_op_cb cb) {
|
||||
uv_async_t* async = (uv_async_t*)current_kernel_malloc(
|
||||
sizeof(uv_async_t),
|
||||
"uv_async_t");
|
||||
uv_async_init(loop, async, native_crust_async_op_cb);
|
||||
uv_async_init(loop, async, foreign_extern_async_op_cb);
|
||||
async->data = (void*)cb;
|
||||
// decrement the ref count, so that our async bind
|
||||
// doesn't count towards keeping the loop alive
|
||||
@ -136,7 +136,7 @@ rust_uv_bind_op_cb(uv_loop_t* loop, crust_async_op_cb cb) {
|
||||
|
||||
extern "C" void
|
||||
rust_uv_stop_op_cb(uv_handle_t* op_handle) {
|
||||
uv_close(op_handle, native_close_op_cb);
|
||||
uv_close(op_handle, foreign_close_op_cb);
|
||||
}
|
||||
|
||||
extern "C" void
|
||||
@ -150,10 +150,10 @@ rust_uv_close(uv_handle_t* handle, uv_close_cb cb) {
|
||||
}
|
||||
|
||||
extern "C" void
|
||||
rust_uv_hilvl_close(uv_handle_t* handle, crust_close_cb cb) {
|
||||
rust_uv_hilvl_close(uv_handle_t* handle, extern_close_cb cb) {
|
||||
handle_data* data = (handle_data*)handle->data;
|
||||
data->close_cb = cb;
|
||||
uv_close(handle, native_close_cb);
|
||||
uv_close(handle, foreign_close_cb);
|
||||
}
|
||||
|
||||
extern "C" void
|
||||
@ -181,12 +181,12 @@ rust_uv_async_init(uv_loop_t* loop_handle,
|
||||
}
|
||||
|
||||
extern "C" void*
|
||||
rust_uv_hilvl_async_init(uv_loop_t* loop, crust_simple_cb cb,
|
||||
rust_uv_hilvl_async_init(uv_loop_t* loop, extern_simple_cb cb,
|
||||
uint8_t* buf) {
|
||||
uv_async_t* async = (uv_async_t*)current_kernel_malloc(
|
||||
sizeof(uv_async_t),
|
||||
"uv_async_t");
|
||||
uv_async_init(loop, async, native_async_cb);
|
||||
uv_async_init(loop, async, foreign_async_cb);
|
||||
handle_data* data = new_handle_data_from(buf, cb);
|
||||
async->data = data;
|
||||
|
||||
@ -194,7 +194,7 @@ rust_uv_hilvl_async_init(uv_loop_t* loop, crust_simple_cb cb,
|
||||
}
|
||||
|
||||
extern "C" void*
|
||||
rust_uv_hilvl_timer_init(uv_loop_t* loop, crust_simple_cb cb,
|
||||
rust_uv_hilvl_timer_init(uv_loop_t* loop, extern_simple_cb cb,
|
||||
uint8_t* buf) {
|
||||
uv_timer_t* new_timer = (uv_timer_t*)current_kernel_malloc(
|
||||
sizeof(uv_timer_t),
|
||||
@ -209,7 +209,7 @@ rust_uv_hilvl_timer_init(uv_loop_t* loop, crust_simple_cb cb,
|
||||
extern "C" void
|
||||
rust_uv_hilvl_timer_start(uv_timer_t* the_timer, uint32_t timeout,
|
||||
uint32_t repeat) {
|
||||
uv_timer_start(the_timer, native_timer_cb, timeout, repeat);
|
||||
uv_timer_start(the_timer, foreign_timer_cb, timeout, repeat);
|
||||
}
|
||||
|
||||
extern "C" int
|
||||
|
||||
Loading…
Reference in New Issue
Block a user