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Issue 1984363002: initial checkin of SkSL compiler (Closed) Base URL: https://skia.googlesource.com/skia@master
Patch Set: fixed CMake build Created 4 years, 5 months ago
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1 /*
2
3 This file is IGNORED during the build process!
4
5 As this file is updated so infrequently and flex is not universally pres ent on build machines,
6 the lex.sksl.c file must be manually regenerated if you make any changes to this file. Just run:
7
8 flex sksl.flex
9
10 You will have to manually add a copyright notice to the top of lex.sksl.c.
11
12 */
13
14 %option prefix="sksl"
15 %option reentrant
16 %option yylineno
17 %option never-interactive
18 %option nounistd
19
20 DIGIT [0-9]
21 LETTER [a-zA-Z_$]
22
23 %%
24
25 {DIGIT}*"."{DIGIT}+([eE][+-]?{DIGIT}+)? { return SkSL::Token::FLOAT_LITERAL; }
26
27 {DIGIT}+"."{DIGIT}*([eE][+-]?{DIGIT}+)? { return SkSL::Token::FLOAT_LITERAL; }
28
29 {DIGIT}+([eE][+-]?{DIGIT}+) { return SkSL::Token::FLOAT_LITERAL; }
30
31 {DIGIT}+ { return SkSL::Token::INT_LITERAL; }
32
33 true { return SkSL::Token::TRUE_LITERAL; }
34
35 false { return SkSL::Token::FALSE_LITERAL; }
36
37 if { return SkSL::Token::IF; }
38
39 else { return SkSL::Token::ELSE; }
40
41 for { return SkSL::Token::FOR; }
42
43 while { return SkSL::Token::WHILE; }
44
45 do { return SkSL::Token::DO; }
46
47 break { return SkSL::Token::BREAK; }
48
49 continue { return SkSL::Token::CONTINUE; }
50
51 discard { return SkSL::Token::DISCARD; }
52
53 return { return SkSL::Token::RETURN; }
54
55 in { return SkSL::Token::IN; }
56
57 out { return SkSL::Token::OUT; }
58
59 inout { return SkSL::Token::INOUT; }
60
61 uniform { return SkSL::Token::UNIFORM; }
62
63 const { return SkSL::Token::CONST; }
64
65 lowp { return SkSL::Token::LOWP; }
66
67 mediump { return SkSL::Token::MEDIUMP; }
68
69 highp { return SkSL::Token::HIGHP; }
70
71 struct { return SkSL::Token::STRUCT; }
72
73 layout { return SkSL::Token::LAYOUT; }
74
75 precision { return SkSL::Token::PRECISION; }
76
77 {LETTER}({DIGIT}|{LETTER})* { return SkSL::Token::IDENTIFIER; }
78
79 "#"{LETTER}({DIGIT}|{LETTER})* { return SkSL::Token::DIRECTIVE; }
80
81 "(" { return SkSL::Token::LPAREN; }
82
83 ")" { return SkSL::Token::RPAREN; }
84
85 "{" { return SkSL::Token::LBRACE; }
86
87 "}" { return SkSL::Token::RBRACE; }
88
89 "[" { return SkSL::Token::LBRACKET; }
90
91 "]" { return SkSL::Token::RBRACKET; }
92
93 "." { return SkSL::Token::DOT; }
94
95 "," { return SkSL::Token::COMMA; }
96
97 "++" { return SkSL::Token::PLUSPLUS; }
98
99 "--" { return SkSL::Token::MINUSMINUS; }
100
101 "+" { return SkSL::Token::PLUS; }
102
103 "-" { return SkSL::Token::MINUS; }
104
105 "*" { return SkSL::Token::STAR; }
106
107 "/" { return SkSL::Token::SLASH; }
108
109 "%" { return SkSL::Token::PERCENT; }
110
111 "<<" { return SkSL::Token::SHL; }
112
113 ">>" { return SkSL::Token::SHR; }
114
115 "|" { return SkSL::Token::BITWISEOR; }
116
117 "^" { return SkSL::Token::BITWISEXOR; }
118
119 "&" { return SkSL::Token::BITWISEAND; }
120
121 "||" { return SkSL::Token::LOGICALOR; }
122
123 "^^" { return SkSL::Token::LOGICALXOR; }
124
125 "&&" { return SkSL::Token::LOGICALAND; }
126
127 "!" { return SkSL::Token::NOT; }
128
129 "?" { return SkSL::Token::QUESTION; }
130
131 ":" { return SkSL::Token::COLON; }
132
133 "=" { return SkSL::Token::EQ; }
134
135 "==" { return SkSL::Token::EQEQ; }
136
137 "!=" { return SkSL::Token::NEQ; }
138
139 ">" { return SkSL::Token::GT; }
140
141 "<" { return SkSL::Token::LT; }
142
143 ">=" { return SkSL::Token::GTEQ; }
144
145 "<=" { return SkSL::Token::LTEQ; }
146
147 "+=" { return SkSL::Token::PLUSEQ; }
148
149 "-=" { return SkSL::Token::MINUSEQ; }
150
151 "*=" { return SkSL::Token::STAREQ; }
152
153 "/=" { return SkSL::Token::SLASHEQ; }
154
155 "%=" { return SkSL::Token::PERCENTEQ; }
156
157 "<<=" { return SkSL::Token::SHLEQ; }
158
159 ">>=" { return SkSL::Token::SHREQ; }
160
161 "|=" { return SkSL::Token::BITWISEOREQ; }
162
163 "^=" { return SkSL::Token::BITWISEXOREQ; }
164
165 "&=" { return SkSL::Token::BITWISEANDEQ; }
166
167 "||=" { return SkSL::Token::LOGICALOREQ; }
168
169 "^^=" { return SkSL::Token::LOGICALXOREQ; }
170
171 "&&=" { return SkSL::Token::LOGICALANDEQ; }
172
173 ";" { return SkSL::Token::SEMICOLON; }
174
175 "//".* /* line comment */
176
177 "/*"([^*]|"*"[^/])*"*/" /* block comment */
178
179 [ \t\r\n]+ /* whitespace */
180
181 . { return SkSL::Token::INVALID_TOKEN; }
182
183 %%
184
185 int skslwrap(yyscan_t scanner) {
186 return 1; // terminate
187 }
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