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tokens.js
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tokens.js
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import {ExternalTokenizer} from "@lezer/lr"
import {
abstract, and, array, as, Boolean, _break, _case, _catch, clone, _const, _continue,
declare, _default, _do, echo, _else, elseif, enddeclare, endfor, endforeach, endif,
endswitch, endwhile, _enum, _extends, final, _finally, fn, _for, foreach, from,
_function, global, goto, _if, _implements, include, include_once, _instanceof,
insteadof, _interface, list, match, namespace, _new, _null, or, print, _require, require_once,
_return, _switch, _throw, trait, _try, unset, use, _var, Visibility,
_while, xor, _yield,
castOpen, eof, automaticSemicolon, HeredocString,
interpolatedStringContent, EscapeSequence, afterInterpolation
} from "./parser.terms.js"
const keywordMap = {
abstract,
and,
array,
as,
true: Boolean,
false: Boolean,
break: _break,
case: _case,
catch: _catch,
clone,
const: _const,
continue: _continue,
declare,
default: _default,
do: _do,
echo,
else: _else,
elseif,
enddeclare,
endfor,
endforeach,
endif,
endswitch,
endwhile,
enum: _enum,
extends: _extends,
final,
finally: _finally,
fn,
for: _for,
foreach,
from,
function: _function,
global,
goto,
if: _if,
implements: _implements,
include,
include_once,
instanceof: _instanceof,
insteadof,
interface: _interface,
list,
match,
namespace,
new: _new,
null: _null,
or,
print,
require: _require,
require_once,
return: _return,
switch: _switch,
throw: _throw,
trait,
try: _try,
unset,
use,
var: _var,
public: Visibility,
private: Visibility,
protected: Visibility,
while: _while,
xor,
yield: _yield,
__proto__: null,
}
export function keywords(name) {
let found = keywordMap[name.toLowerCase()]
return found == null ? -1 : found
}
function isSpace(ch) {
return ch == 9 || ch == 10 || ch == 13 || ch == 32
}
function isASCIILetter(ch) {
return ch >= 97 && ch <= 122 || ch >= 65 && ch <= 90
}
function isIdentifierStart(ch) {
return ch == 95 || ch >= 0x80 || isASCIILetter(ch)
}
function isHex(ch) {
return ch >= 48 && ch <= 55 || ch >= 97 && ch <= 102 || ch >= 65 && ch <= 70 /* 0-9, a-f, A-F */
}
const castTypes = {
int: true, integer: true, bool: true, boolean: true,
float: true, double: true, real: true, string: true,
array: true, object: true, unset: true,
__proto__: null
}
export const expression = new ExternalTokenizer(input => {
if (input.next == 40 /* '(' */) {
input.advance()
let peek = 0
while (isSpace(input.peek(peek))) peek++
let name = "", next
while (isASCIILetter(next = input.peek(peek))) {
name += String.fromCharCode(next)
peek++
}
while (isSpace(input.peek(peek))) peek++
if (input.peek(peek) == 41 /* ')' */ && castTypes[name.toLowerCase()])
input.acceptToken(castOpen)
} else if (input.next == 60 /* '<' */ && input.peek(1) == 60 && input.peek(2) == 60) {
for (let i = 0; i < 3; i++) input.advance();
while (input.next == 32 /* ' ' */ || input.next == 9 /* '\t' */) input.advance()
let quoted = input.next == 39 /* "'" */
if (quoted) input.advance()
if (!isIdentifierStart(input.next)) return
let tag = String.fromCharCode(input.next)
for (;;) {
input.advance()
if (!isIdentifierStart(input.next) && !(input.next >= 48 && input.next <= 55) /* 0-9 */) break
tag += String.fromCharCode(input.next)
}
if (quoted) {
if (input.next != 39) return
input.advance()
}
if (input.next != 10 /* '\n' */ && input.next != 13 /* '\r' */) return
for (;;) {
let lineStart = input.next == 10 || input.next == 13
input.advance()
if (input.next < 0) return
if (lineStart) {
while (input.next == 32 /* ' ' */ || input.next == 9 /* '\t' */) input.advance()
let match = true
for (let i = 0; i < tag.length; i++) {
if (input.next != tag.charCodeAt(i)) { match = false; break }
input.advance()
}
if (match) return input.acceptToken(HeredocString)
}
}
}
})
export const eofToken = new ExternalTokenizer(input => {
if (input.next < 0) input.acceptToken(eof)
})
export const semicolon = new ExternalTokenizer((input, stack) => {
if (input.next == 63 /* '?' */ && stack.canShift(automaticSemicolon) && input.peek(1) == 62 /* '>' */)
input.acceptToken(automaticSemicolon)
})
function scanEscape(input) {
let after = input.peek(1)
if (after == 110 /* 'n' */ || after == 114 /* 'r' */ || after == 116 /* 't' */ ||
after == 118 /* 'v' */ || after == 101 /* 'e' */ || after == 102 /* 'f' */ ||
after == 92 /* '\\' */ || after == 36 /* '"' */ || after == 34 /* '$' */ ||
after == 123 /* '{' */)
return 2
if (after >= 48 && after <= 55 /* '0'-'7' */) {
let size = 2, next
while (size < 5 && (next = input.peek(size)) >= 48 && next <= 55) size++
return size
}
if (after == 120 /* 'x' */ && isHex(input.peek(2))) {
return isHex(input.peek(3)) ? 4 : 3
}
if (after == 117 /* 'u' */ && input.peek(2) == 123 /* '{' */) {
for (let size = 3;; size++) {
let next = input.peek(size)
if (next == 125 /* '}' */) return size == 2 ? 0 : size + 1
if (!isHex(next)) break
}
}
return 0
}
export const interpolated = new ExternalTokenizer((input, stack) => {
let content = false
for (;; content = true) {
if (input.next == 34 /* '"' */ || input.next < 0 ||
input.next == 36 /* '$' */ && (isIdentifierStart(input.peek(1)) || input.peek(1) == 123 /* '{' */) ||
input.next == 123 /* '{' */ && input.peek(1) == 36 /* '$' */) {
break
} else if (input.next == 92 /* '\\' */) {
let escaped = scanEscape(input)
if (escaped) {
if (content) break
else return input.acceptToken(EscapeSequence, escaped)
}
} else if (!content && (
input.next == 91 /* '[' */ ||
input.next == 45 /* '-' */ && input.peek(1) == 62 /* '>' */ && isIdentifierStart(input.peek(2)) ||
input.next == 63 /* '?' */ && input.peek(1) == 45 && input.peek(2) == 62 && isIdentifierStart(input.peek(3))
) && stack.canShift(afterInterpolation)) {
break
}
input.advance()
}
if (content) input.acceptToken(interpolatedStringContent)
})