Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 104x 104x 1x 1x 20257x 20257x 20257x 20257x 1x 1x 20257x 20257x 20257x 1x 1x 20361x 20361x 1x 1x 1x 1x 1x 1x 1x 1x 1x 104x 104x 104x 104x 7016x 3475x 8x 3475x 3467x 3467x 3475x 7016x 7016x 104x 104x 104x 104x 104x 1x 1x 1x 104x 104x 104x 104x 104x 104x 104x 104x 104x 104x 20257x 20257x 20257x 20257x 20257x 20257x 20257x 973x 973x 164x 164x 164x 973x 973x 19284x 19284x 20257x 200x 8x 8x 200x 192x 192x 192x 20257x 5x 5x 5x 5x 19084x 3x 3x 3x 3x 3x 19084x 19084x 20257x 125x 2x 125x 3x 3x 125x 20257x 3x 3x 3x 3x 18956x 18956x 20257x 164x 164x 164x 20257x 3794x 3794x 20257x 721x 721x 721x 721x 20257x 20257x 20257x 20257x 20257x 20257x 20257x 20257x 20257x 20257x 20257x 20257x 20257x 20257x 20257x 20257x 20257x 1107x 1107x 1107x 20257x 13170x 13170x 20257x 20257x 104x 104x 104x 104x 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) {
this.result.push(new Comment(new Position(row, col), 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 === "'") {
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();
}
} |