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-rw-r--r--src/lexer/mod.rs143
1 files changed, 78 insertions, 65 deletions
diff --git a/src/lexer/mod.rs b/src/lexer/mod.rs
index 842059a42..f62dfc507 100644
--- a/src/lexer/mod.rs
+++ b/src/lexer/mod.rs
@@ -1,4 +1,4 @@
1use {Token, SyntaxKind}; 1use {SyntaxKind, Token};
2use syntax_kinds::*; 2use syntax_kinds::*;
3 3
4mod ptr; 4mod ptr;
@@ -11,10 +11,11 @@ mod numbers;
11use self::numbers::scan_number; 11use self::numbers::scan_number;
12 12
13mod strings; 13mod strings;
14use self::strings::{is_string_literal_start, scan_char, scan_byte_char_or_string, scan_string, scan_raw_string}; 14use self::strings::{is_string_literal_start, scan_byte_char_or_string, scan_char, scan_raw_string,
15 scan_string};
15 16
16mod comments; 17mod comments;
17use self::comments::{scan_shebang, scan_comment}; 18use self::comments::{scan_comment, scan_shebang};
18 19
19pub fn tokenize(text: &str) -> Vec<Token> { 20pub fn tokenize(text: &str) -> Vec<Token> {
20 let mut text = text; 21 let mut text = text;
@@ -45,10 +46,10 @@ fn next_token_inner(c: char, ptr: &mut Ptr) -> SyntaxKind {
45 match c { 46 match c {
46 '#' => if scan_shebang(ptr) { 47 '#' => if scan_shebang(ptr) {
47 return SHEBANG; 48 return SHEBANG;
48 } 49 },
49 '/' => if let Some(kind) = scan_comment(ptr) { 50 '/' => if let Some(kind) = scan_comment(ptr) {
50 return kind; 51 return kind;
51 } 52 },
52 _ => (), 53 _ => (),
53 } 54 }
54 55
@@ -89,79 +90,91 @@ fn next_token_inner(c: char, ptr: &mut Ptr) -> SyntaxKind {
89 '%' => return PERCENT, 90 '%' => return PERCENT,
90 91
91 // Multi-byte tokens. 92 // Multi-byte tokens.
92 '.' => return match (ptr.next(), ptr.nnext()) { 93 '.' => {
93 (Some('.'), Some('.')) => { 94 return match (ptr.next(), ptr.nnext()) {
94 ptr.bump(); 95 (Some('.'), Some('.')) => {
95 ptr.bump(); 96 ptr.bump();
96 DOTDOTDOT 97 ptr.bump();
97 }, 98 DOTDOTDOT
98 (Some('.'), Some('=')) => { 99 }
99 ptr.bump(); 100 (Some('.'), Some('=')) => {
100 ptr.bump(); 101 ptr.bump();
101 DOTDOTEQ 102 ptr.bump();
102 }, 103 DOTDOTEQ
103 (Some('.'), _) => { 104 }
104 ptr.bump(); 105 (Some('.'), _) => {
105 DOTDOT 106 ptr.bump();
106 }, 107 DOTDOT
107 _ => DOT 108 }
108 }, 109 _ => DOT,
109 ':' => return match ptr.next() {
110 Some(':') => {
111 ptr.bump();
112 COLONCOLON
113 } 110 }
114 _ => COLON 111 }
115 }, 112 ':' => {
116 '=' => return match ptr.next() { 113 return match ptr.next() {
117 Some('=') => { 114 Some(':') => {
118 ptr.bump(); 115 ptr.bump();
119 EQEQ 116 COLONCOLON
117 }
118 _ => COLON,
120 } 119 }
121 Some('>') => { 120 }
122 ptr.bump(); 121 '=' => {
123 FAT_ARROW 122 return match ptr.next() {
123 Some('=') => {
124 ptr.bump();
125 EQEQ
126 }
127 Some('>') => {
128 ptr.bump();
129 FAT_ARROW
130 }
131 _ => EQ,
124 } 132 }
125 _ => EQ, 133 }
126 }, 134 '!' => {
127 '!' => return match ptr.next() { 135 return match ptr.next() {
128 Some('=') => { 136 Some('=') => {
137 ptr.bump();
138 NEQ
139 }
140 _ => EXCL,
141 }
142 }
143 '-' => {
144 return if ptr.next_is('>') {
129 ptr.bump(); 145 ptr.bump();
130 NEQ 146 THIN_ARROW
147 } else {
148 MINUS
131 } 149 }
132 _ => EXCL, 150 }
133 },
134 '-' => return if ptr.next_is('>') {
135 ptr.bump();
136 THIN_ARROW
137 } else {
138 MINUS
139 },
140 151
141 // If the character is an ident start not followed by another single 152 // If the character is an ident start not followed by another single
142 // quote, then this is a lifetime name: 153 // quote, then this is a lifetime name:
143 '\'' => return if ptr.next_is_p(is_ident_start) && !ptr.nnext_is('\'') { 154 '\'' => {
144 ptr.bump(); 155 return if ptr.next_is_p(is_ident_start) && !ptr.nnext_is('\'') {
145 while ptr.next_is_p(is_ident_continue) {
146 ptr.bump(); 156 ptr.bump();
157 while ptr.next_is_p(is_ident_continue) {
158 ptr.bump();
159 }
160 // lifetimes shouldn't end with a single quote
161 // if we find one, then this is an invalid character literal
162 if ptr.next_is('\'') {
163 ptr.bump();
164 return CHAR; // TODO: error reporting
165 }
166 LIFETIME
167 } else {
168 scan_char(ptr);
169 scan_literal_suffix(ptr);
170 CHAR
147 } 171 }
148 // lifetimes shouldn't end with a single quote 172 }
149 // if we find one, then this is an invalid character literal
150 if ptr.next_is('\'') {
151 ptr.bump();
152 return CHAR; // TODO: error reporting
153 }
154 LIFETIME
155 } else {
156 scan_char(ptr);
157 scan_literal_suffix(ptr);
158 CHAR
159 },
160 'b' => { 173 'b' => {
161 let kind = scan_byte_char_or_string(ptr); 174 let kind = scan_byte_char_or_string(ptr);
162 scan_literal_suffix(ptr); 175 scan_literal_suffix(ptr);
163 return kind 176 return kind;
164 }, 177 }
165 '"' => { 178 '"' => {
166 scan_string(ptr); 179 scan_string(ptr);
167 scan_literal_suffix(ptr); 180 scan_literal_suffix(ptr);