G: const item

This commit is contained in:
Aleksey Kladov 2018-02-03 12:05:25 +03:00
parent 5e7504b978
commit e5273d33d0
8 changed files with 114 additions and 14 deletions

View file

@ -25,6 +25,7 @@ Grammar(
"const",
"static",
"mut",
"unsafe",
],
tokens: [
"ERROR",
@ -89,6 +90,7 @@ Grammar(
"MOD_ITEM",
"USE_ITEM",
"STATIC_ITEM",
"CONST_ITEM",
"EXTERN_BLOCK",
"ENUM_VARIANT",

View file

@ -0,0 +1,21 @@
use super::*;
pub(super) fn static_item(p: &mut Parser) {
const_or_static(p, STATIC_KW)
}
pub(super) fn const_item(p: &mut Parser) {
const_or_static(p, CONST_KW)
}
fn const_or_static(p: &mut Parser, kw: SyntaxKind) {
assert!(p.at(kw));
p.bump();
p.eat(MUT_KW); // TODO: validator to forbid const mut
p.expect(IDENT);
p.expect(COLON);
types::type_ref(p);
p.expect(EQ);
expressions::expr(p);
p.expect(SEMI);
}

View file

@ -2,6 +2,7 @@ use super::*;
mod structs;
mod use_item;
mod consts;
pub(super) fn mod_contents(p: &mut Parser, stop_on_r_curly: bool) {
attributes::inner_attributes(p);
@ -47,9 +48,26 @@ fn item(p: &mut Parser) {
}
}
STATIC_KW => {
static_item(p);
consts::static_item(p);
STATIC_ITEM
}
CONST_KW => match p.nth(1) {
FN_KW => {
p.bump();
fn_item(p);
FN_ITEM
}
UNSAFE_KW if p.nth(2) == FN_KW => {
p.bump();
p.bump();
fn_item(p);
FN_ITEM
}
_ => {
consts::const_item(p);
CONST_ITEM
}
},
MOD_KW => {
mod_item(p);
MOD_ITEM
@ -101,19 +119,6 @@ fn extern_block(p: &mut Parser) {
p.bump();
p.expect(R_CURLY);
}
fn static_item(p: &mut Parser) {
assert!(p.at(STATIC_KW));
p.bump();
p.eat(MUT_KW);
p.expect(IDENT);
p.expect(COLON);
types::type_ref(p);
p.expect(EQ);
expressions::expr(p);
p.expect(SEMI);
}
fn mod_item(p: &mut Parser) {
assert!(p.at(MOD_KW));
p.bump();

View file

@ -31,6 +31,7 @@ pub enum SyntaxKind {
CONST_KW,
STATIC_KW,
MUT_KW,
UNSAFE_KW,
ERROR,
IDENT,
UNDERSCORE,
@ -90,6 +91,7 @@ pub enum SyntaxKind {
MOD_ITEM,
USE_ITEM,
STATIC_ITEM,
CONST_ITEM,
EXTERN_BLOCK,
ENUM_VARIANT,
NAMED_FIELD,
@ -144,6 +146,7 @@ impl SyntaxKind {
CONST_KW => &SyntaxInfo { name: "CONST_KW" },
STATIC_KW => &SyntaxInfo { name: "STATIC_KW" },
MUT_KW => &SyntaxInfo { name: "MUT_KW" },
UNSAFE_KW => &SyntaxInfo { name: "UNSAFE_KW" },
ERROR => &SyntaxInfo { name: "ERROR" },
IDENT => &SyntaxInfo { name: "IDENT" },
UNDERSCORE => &SyntaxInfo { name: "UNDERSCORE" },
@ -203,6 +206,7 @@ impl SyntaxKind {
MOD_ITEM => &SyntaxInfo { name: "MOD_ITEM" },
USE_ITEM => &SyntaxInfo { name: "USE_ITEM" },
STATIC_ITEM => &SyntaxInfo { name: "STATIC_ITEM" },
CONST_ITEM => &SyntaxInfo { name: "CONST_ITEM" },
EXTERN_BLOCK => &SyntaxInfo { name: "EXTERN_BLOCK" },
ENUM_VARIANT => &SyntaxInfo { name: "ENUM_VARIANT" },
NAMED_FIELD => &SyntaxInfo { name: "NAMED_FIELD" },
@ -253,6 +257,7 @@ pub(crate) fn ident_to_keyword(ident: &str) -> Option<SyntaxKind> {
"const" => Some(CONST_KW),
"static" => Some(STATIC_KW),
"mut" => Some(MUT_KW),
"unsafe" => Some(UNSAFE_KW),
_ => None,
}
}

View file

@ -0,0 +1,5 @@
const fn foo() {
}
const unsafe fn foo() {
}

View file

@ -0,0 +1,29 @@
FILE@[0; 46)
FN_ITEM@[0; 20)
CONST_KW@[0; 5)
WHITESPACE@[5; 6)
FN_KW@[6; 8)
WHITESPACE@[8; 9)
IDENT@[9; 12) "foo"
L_PAREN@[12; 13)
R_PAREN@[13; 14)
WHITESPACE@[14; 15)
L_CURLY@[15; 16)
WHITESPACE@[16; 17)
R_CURLY@[17; 18)
WHITESPACE@[18; 20)
FN_ITEM@[20; 46)
CONST_KW@[20; 25)
WHITESPACE@[25; 26)
UNSAFE_KW@[26; 32)
WHITESPACE@[32; 33)
FN_KW@[33; 35)
WHITESPACE@[35; 36)
IDENT@[36; 39) "foo"
L_PAREN@[39; 40)
R_PAREN@[40; 41)
WHITESPACE@[41; 42)
L_CURLY@[42; 43)
WHITESPACE@[43; 44)
R_CURLY@[44; 45)
WHITESPACE@[45; 46)

View file

@ -0,0 +1,2 @@
const FOO: u32 = 92;
const mut BAR: u32 = 62;

View file

@ -0,0 +1,31 @@
FILE@[0; 46)
CONST_ITEM@[0; 21)
CONST_KW@[0; 5)
WHITESPACE@[5; 6)
IDENT@[6; 9) "FOO"
COLON@[9; 10)
WHITESPACE@[10; 11)
IDENT@[11; 14) "u32"
WHITESPACE@[14; 15)
EQ@[15; 16)
LITERAL@[16; 19)
WHITESPACE@[16; 17)
INT_NUMBER@[17; 19)
SEMI@[19; 20)
WHITESPACE@[20; 21)
CONST_ITEM@[21; 46)
CONST_KW@[21; 26)
WHITESPACE@[26; 27)
MUT_KW@[27; 30)
WHITESPACE@[30; 31)
IDENT@[31; 34) "BAR"
COLON@[34; 35)
WHITESPACE@[35; 36)
IDENT@[36; 39) "u32"
WHITESPACE@[39; 40)
EQ@[40; 41)
LITERAL@[41; 44)
WHITESPACE@[41; 42)
INT_NUMBER@[42; 44)
SEMI@[44; 45)
WHITESPACE@[45; 46)