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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 140x 140x 1x 1x 27456x 27456x 27456x 27456x 1x 1x 27454x 27454x 27454x 1x 1x 27594x 27594x 1x 1x 1x 1x 1x 1x 1x 1x 1x 140x 140x 140x 140x 9809x 4725x 4725x 10x 4725x 4715x 4715x 4725x 9809x 9809x 140x 140x 140x 140x 140x 1x 1x 1x 140x 140x 140x 140x 140x 140x 140x 140x 140x 140x 27454x 27454x 27454x 27454x 27454x 27454x 27454x 1254x 1254x 2x 2x 2x 1254x 206x 206x 206x 1254x 1254x 26200x 26200x 27454x 213x 9x 9x 213x 204x 204x 204x 27454x 5x 5x 5x 5x 25987x 5x 5x 5x 5x 5x 25986x 25986x 27454x 125x 2x 125x 3x 3x 125x 27454x 3x 3x 3x 3x 25858x 25858x 27454x 206x 206x 206x 27454x 5404x 5404x 27454x 971x 971x 971x 971x 27454x 27454x 27454x 27454x 27454x 27454x 27454x 27454x 27454x 27454x 27454x 27454x 27454x 27454x 27454x 27454x 27454x 1533x 1533x 1533x 27454x 17744x 17744x 27454x 27454x 140x 140x 140x 140x 1x | import {Comment, Identifier} from "../abap/1_lexer/tokens";
import {AbstractToken} from "../abap/1_lexer/tokens/abstract_token";
import {IFile} from "../files/_ifile";
import {Position} from "../position";
// todo: Keywords must be all uppercase, all lowercase, or in lowercase with an
// uppercase initial letter. Other mixes of uppercase and lowercase are not allowed
class Stream {
private buffer: string;
public constructor(buffer: string) {
this.buffer = buffer;
}
public takeNext(): string {
const next = this.buffer.substring(0, 1);
this.buffer = this.buffer.substring(1);
return next;
}
public peekNext(): string {
const next = this.buffer.substring(0, 1);
return next;
}
public length(): number {
return this.buffer.length;
}
}
enum Mode {
Default,
String,
SingleLineComment,
MultiLineComment,
}
class Result {
private readonly result: AbstractToken[] = [];
public add(text: string, row: number, col: number, mode: Mode): string {
if (text.length > 0) {
if (mode === Mode.SingleLineComment
&& (text.startsWith("--") || text.startsWith("//"))) {
this.result.push(new Comment(new Position(row, col - text.length), text));
} else {
this.result.push(new Identifier(new Position(row, col), text));
}
}
return "";
}
public get() {
return this.result;
}
}
export class CDSLexer {
public static run(file: IFile): AbstractToken[] {
const result = new Result();
let mode = Mode.Default;
let row = 1;
let col = 1;
let build = "";
const stream = new Stream(file.getRaw().replace(/\r/g, "").replace(/\u00a0/g, " "));
let next = "";
while (stream.length() > 0) {
const prev = next;
next = stream.takeNext();
const nextNext = stream.peekNext();
col++;
// string handling
if (mode === Mode.String) {
build += next;
if (next === "'" && nextNext === "'") {
// escaped single quote, continue string
build += stream.takeNext();
col++;
} else if (next === "'") {
build = result.add(build, row, col, mode);
mode = Mode.Default;
}
continue;
}
// single line comment handling
if (mode === Mode.SingleLineComment) {
if (next === "\n") {
build = result.add(build, row, col, mode);
mode = Mode.Default;
} else {
build += next;
continue;
}
} else if (mode === Mode.Default && next === "/" && nextNext === "/") {
mode = Mode.SingleLineComment;
build = result.add(build, row, col, mode);
build += next;
continue;
} else if (mode === Mode.Default && next === "-" && nextNext === "-") {
mode = Mode.SingleLineComment;
build = result.add(build, row, col, mode);
build += next;
continue;
}
// multi line comment handling
if (mode === Mode.MultiLineComment) {
if (next === "\n") {
row++;
} else if (prev === "*" && next === "/") {
mode = Mode.Default;
}
continue;
} else if (mode === Mode.Default && next === "/" && nextNext === "*") {
mode = Mode.MultiLineComment;
build = result.add(build, row, col, mode);
continue;
}
switch (next) {
case "'":
mode = Mode.String;
build += next;
break;
case " ":
build = result.add(build, row, col, mode);
break;
case "\n":
build = result.add(build, row, col, mode);
row++;
col = 0;
break;
case ";":
case ":":
case ",":
case ".":
case "{":
case "}":
case "(":
case ")":
case "[":
case "]":
case "=":
case "<":
case ">":
case "+":
case "-":
case "*":
case "/":
build = result.add(build, row, col, mode);
result.add(next, row, col, mode);
break;
default:
build += next;
break;
}
}
result.add(build, row, col, mode);
return result.get();
}
} |