Lexer: symbols

grammar.ron

@@ -6,5 +6,24 @@ Grammar(
         "WHITESPACE",
         "INT_NUMBER",
         "FLOAT_NUMBER",
+        "SEMI",
+        "COMMA",
+        "DOT",
+        "DOTDOT",
+        "DOTDOTDOT",
+        "DOTDOTEQ",
+        "L_PAREN",
+        "R_PAREN",
+        "L_CURLY",
+        "R_CURLY",
+        "L_BRACK",
+        "R_BRACK",
+        "AT",
+        "POUND",
+        "TILDE",
+        "QUESTION",
+        "COLON",
+        "COLONCOLON",
+        "DOLLAR",
     ]
 )

src/lexer/mod.rs

@@ -37,6 +37,47 @@ fn next_token_inner(c: char, ptr: &mut Ptr) -> SyntaxKind {
         return scan_number(c, ptr);
     }
 
+    // One-byte tokens.
+    match c {
+        ';' => return SEMI,
+        ',' => return COMMA,
+        '(' => return L_PAREN,
+        ')' => return R_PAREN,
+        '{' => return L_CURLY,
+        '}' => return R_CURLY,
+        '[' => return L_BRACK,
+        ']' => return R_BRACK,
+        '@' => return AT,
+        '#' => return POUND,
+        '~' => return TILDE,
+        '?' => return QUESTION,
+        '$' => return DOLLAR,
+        '.' => return match (ptr.next(), ptr.nnext()) {
+            (Some('.'), Some('.')) => {
+                ptr.bump();
+                ptr.bump();
+                DOTDOTDOT
+            },
+            (Some('.'), Some('=')) => {
+                ptr.bump();
+                ptr.bump();
+                DOTDOTEQ
+            },
+            (Some('.'), _) => {
+                ptr.bump();
+                DOTDOT
+            },
+            _ => DOT
+        },
+        ':' => return match ptr.next() {
+            Some(':') => {
+                ptr.bump();
+                COLONCOLON
+            }
+            _ => COLON
+        },
+        _ => (),
+    }
     ERROR
 }
 

src/syntax_kinds.rs

@@ -7,14 +7,52 @@ pub const UNDERSCORE: SyntaxKind = SyntaxKind(2);
 pub const WHITESPACE: SyntaxKind = SyntaxKind(3);
 pub const INT_NUMBER: SyntaxKind = SyntaxKind(4);
 pub const FLOAT_NUMBER: SyntaxKind = SyntaxKind(5);
+pub const SEMI: SyntaxKind = SyntaxKind(6);
+pub const COMMA: SyntaxKind = SyntaxKind(7);
+pub const DOT: SyntaxKind = SyntaxKind(8);
+pub const DOTDOT: SyntaxKind = SyntaxKind(9);
+pub const DOTDOTDOT: SyntaxKind = SyntaxKind(10);
+pub const DOTDOTEQ: SyntaxKind = SyntaxKind(11);
+pub const L_PAREN: SyntaxKind = SyntaxKind(12);
+pub const R_PAREN: SyntaxKind = SyntaxKind(13);
+pub const L_CURLY: SyntaxKind = SyntaxKind(14);
+pub const R_CURLY: SyntaxKind = SyntaxKind(15);
+pub const L_BRACK: SyntaxKind = SyntaxKind(16);
+pub const R_BRACK: SyntaxKind = SyntaxKind(17);
+pub const AT: SyntaxKind = SyntaxKind(18);
+pub const POUND: SyntaxKind = SyntaxKind(19);
+pub const TILDE: SyntaxKind = SyntaxKind(20);
+pub const QUESTION: SyntaxKind = SyntaxKind(21);
+pub const COLON: SyntaxKind = SyntaxKind(22);
+pub const COLONCOLON: SyntaxKind = SyntaxKind(23);
+pub const DOLLAR: SyntaxKind = SyntaxKind(24);
 
-static INFOS: [SyntaxInfo; 6] = [
+static INFOS: [SyntaxInfo; 25] = [
     SyntaxInfo { name: "ERROR" },
     SyntaxInfo { name: "IDENT" },
     SyntaxInfo { name: "UNDERSCORE" },
     SyntaxInfo { name: "WHITESPACE" },
     SyntaxInfo { name: "INT_NUMBER" },
     SyntaxInfo { name: "FLOAT_NUMBER" },
+    SyntaxInfo { name: "SEMI" },
+    SyntaxInfo { name: "COMMA" },
+    SyntaxInfo { name: "DOT" },
+    SyntaxInfo { name: "DOTDOT" },
+    SyntaxInfo { name: "DOTDOTDOT" },
+    SyntaxInfo { name: "DOTDOTEQ" },
+    SyntaxInfo { name: "L_PAREN" },
+    SyntaxInfo { name: "R_PAREN" },
+    SyntaxInfo { name: "L_CURLY" },
+    SyntaxInfo { name: "R_CURLY" },
+    SyntaxInfo { name: "L_BRACK" },
+    SyntaxInfo { name: "R_BRACK" },
+    SyntaxInfo { name: "AT" },
+    SyntaxInfo { name: "POUND" },
+    SyntaxInfo { name: "TILDE" },
+    SyntaxInfo { name: "QUESTION" },
+    SyntaxInfo { name: "COLON" },
+    SyntaxInfo { name: "COLONCOLON" },
+    SyntaxInfo { name: "DOLLAR" },
 ];
 
 pub(crate) fn syntax_info(kind: SyntaxKind) -> &'static SyntaxInfo {

tests/data/lexer/0004_number.txt

@@ -38,22 +38,21 @@ WHITESPACE 1 " "
 INT_NUMBER 6 "0E1279"
 WHITESPACE 1 "\n"
 INT_NUMBER 1 "0"
-ERROR 1 "."
-ERROR 1 "."
+DOTDOT 2 ".."
 INT_NUMBER 1 "2"
 WHITESPACE 1 "\n"
 INT_NUMBER 1 "0"
-ERROR 1 "."
+DOT 1 "."
 IDENT 3 "foo"
-ERROR 1 "("
-ERROR 1 ")"
+L_PAREN 1 "("
+R_PAREN 1 ")"
 WHITESPACE 1 "\n"
 INT_NUMBER 2 "0e"
 ERROR 1 "+"
 INT_NUMBER 1 "1"
 WHITESPACE 1 "\n"
 INT_NUMBER 1 "0"
-ERROR 1 "."
+DOT 1 "."
 IDENT 1 "e"
 ERROR 1 "+"
 INT_NUMBER 1 "1"

tests/data/lexer/0005_symbols.rs

@@ -0,0 +1,3 @@
+; , ( ) { } [ ] @ # ~ ? $
+. .. ... ..=
+: ::

tests/data/lexer/0005_symbols.txt

@@ -0,0 +1,37 @@
+SEMI 1 ";"
+WHITESPACE 1 " "
+COMMA 1 ","
+WHITESPACE 1 " "
+L_PAREN 1 "("
+WHITESPACE 1 " "
+R_PAREN 1 ")"
+WHITESPACE 1 " "
+L_CURLY 1 "{"
+WHITESPACE 1 " "
+R_CURLY 1 "}"
+WHITESPACE 1 " "
+L_BRACK 1 "["
+WHITESPACE 1 " "
+R_BRACK 1 "]"
+WHITESPACE 1 " "
+AT 1 "@"
+WHITESPACE 1 " "
+POUND 1 "#"
+WHITESPACE 1 " "
+TILDE 1 "~"
+WHITESPACE 1 " "
+QUESTION 1 "?"
+WHITESPACE 1 " "
+DOLLAR 1 "$"
+WHITESPACE 1 "\n"
+DOT 1 "."
+WHITESPACE 1 " "
+DOTDOT 2 ".."
+WHITESPACE 1 " "
+DOTDOTDOT 3 "..."
+WHITESPACE 1 " "
+DOTDOTEQ 3 "..="
+WHITESPACE 1 "\n"
+COLON 1 ":"
+WHITESPACE 1 " "
+COLONCOLON 2 "::"