File src/Type/StringType.php

1:	<?php declare(strict_types = 1);
2:
3:	namespace PHPStan\Type;
4:
5:	use PHPStan\Php\PhpVersion;
6:	use PHPStan\PhpDocParser\Ast\Type\IdentifierTypeNode;
7:	use PHPStan\PhpDocParser\Ast\Type\TypeNode;
8:	use PHPStan\Reflection\ReflectionProviderStaticAccessor;
9:	use PHPStan\ShouldNotHappenException;
10:	use PHPStan\TrinaryLogic;
11:	use PHPStan\Type\Accessory\AccessoryNonEmptyStringType;
12:	use PHPStan\Type\Constant\ConstantArrayType;
13:	use PHPStan\Type\Constant\ConstantIntegerType;
14:	use PHPStan\Type\Constant\ConstantStringType;
15:	use PHPStan\Type\Traits\MaybeCallableTypeTrait;
16:	use PHPStan\Type\Traits\NonArrayTypeTrait;
17:	use PHPStan\Type\Traits\NonGeneralizableTypeTrait;
18:	use PHPStan\Type\Traits\NonGenericTypeTrait;
19:	use PHPStan\Type\Traits\NonIterableTypeTrait;
20:	use PHPStan\Type\Traits\NonObjectTypeTrait;
21:	use PHPStan\Type\Traits\UndecidedBooleanTypeTrait;
22:	use PHPStan\Type\Traits\UndecidedComparisonTypeTrait;
23:	use function count;
24:
25:	/** @api */
26:	class StringType implements Type
27:	{
28:
29:	use JustNullableTypeTrait;
30:	use MaybeCallableTypeTrait;
31:	use NonArrayTypeTrait;
32:	use NonIterableTypeTrait;
33:	use NonObjectTypeTrait;
34:	use UndecidedBooleanTypeTrait;
35:	use UndecidedComparisonTypeTrait;
36:	use NonGenericTypeTrait;
37:	use NonGeneralizableTypeTrait;
38:
39:	/** @api */
40:	public function __construct()
41:	{
42:	}
43:
44:	public function describe(VerbosityLevel $level): string
45:	{
46:	return 'string';
47:	}
48:
49:	public function getConstantStrings(): array
50:	{
51:	return [];
52:	}
53:
54:	public function isOffsetAccessible(): TrinaryLogic
55:	{
56:	return TrinaryLogic::createYes();
57:	}
58:
59:	public function isOffsetAccessLegal(): TrinaryLogic
60:	{
61:	return TrinaryLogic::createYes();
62:	}
63:
64:	public function hasOffsetValueType(Type $offsetType): TrinaryLogic
65:	{
66:	return $offsetType->isInteger()->and(TrinaryLogic::createMaybe());
67:	}
68:
69:	public function getOffsetValueType(Type $offsetType): Type
70:	{
71:	if ($this->hasOffsetValueType($offsetType)->no()) {
72:	return new ErrorType();
73:	}
74:
75:	return new IntersectionType([
76:	new StringType(),
77:	new AccessoryNonEmptyStringType(),
78:	]);
79:	}
80:
81:	public function setOffsetValueType(?Type $offsetType, Type $valueType, bool $unionValues = true): Type
82:	{
83:	if ($offsetType === null) {
84:	return new ErrorType();
85:	}
86:
87:	$valueStringType = $valueType->toString();
88:	if ($valueStringType instanceof ErrorType) {
89:	return new ErrorType();
90:	}
91:
92:	if ($offsetType->isInteger()->yes() \|\| $offsetType instanceof MixedType) {
93:	return new IntersectionType([
94:	new StringType(),
95:	new AccessoryNonEmptyStringType(),
96:	]);
97:	}
98:
99:	return new ErrorType();
100:	}
101:
102:	public function setExistingOffsetValueType(Type $offsetType, Type $valueType): Type
103:	{
104:	return $this;
105:	}
106:
107:	public function unsetOffset(Type $offsetType): Type
108:	{
109:	return new ErrorType();
110:	}
111:
112:	public function accepts(Type $type, bool $strictTypes): AcceptsResult
113:	{
114:	if ($type instanceof self) {
115:	return AcceptsResult::createYes();
116:	}
117:
118:	if ($type instanceof CompoundType) {
119:	return $type->isAcceptedBy($this, $strictTypes);
120:	}
121:
122:	$thatClassNames = $type->getObjectClassNames();
123:	if (count($thatClassNames) > 1) {
124:	throw new ShouldNotHappenException();
125:	}
126:
127:	if ($thatClassNames === [] \|\| $strictTypes) {
128:	return AcceptsResult::createNo();
129:	}
130:
131:	$reflectionProvider = ReflectionProviderStaticAccessor::getInstance();
132:	if (!$reflectionProvider->hasClass($thatClassNames[0])) {
133:	return AcceptsResult::createNo();
134:	}
135:
136:	$typeClass = $reflectionProvider->getClass($thatClassNames[0]);
137:	return AcceptsResult::createFromBoolean(
138:	$typeClass->hasNativeMethod('__toString'),
139:	);
140:	}
141:
142:	public function toNumber(): Type
143:	{
144:	return new ErrorType();
145:	}
146:
147:	public function toAbsoluteNumber(): Type
148:	{
149:	return new ErrorType();
150:	}
151:
152:	public function toInteger(): Type
153:	{
154:	return new IntegerType();
155:	}
156:
157:	public function toFloat(): Type
158:	{
159:	return new FloatType();
160:	}
161:
162:	public function toString(): Type
163:	{
164:	return $this;
165:	}
166:
167:	public function toArray(): Type
168:	{
169:	return new ConstantArrayType(
170:	[new ConstantIntegerType(0)],
171:	[$this],
172:	[1],
173:	[],
174:	TrinaryLogic::createYes(),
175:	);
176:	}
177:
178:	public function toArrayKey(): Type
179:	{
180:	return $this;
181:	}
182:
183:	public function isNull(): TrinaryLogic
184:	{
185:	return TrinaryLogic::createNo();
186:	}
187:
188:	public function isTrue(): TrinaryLogic
189:	{
190:	return TrinaryLogic::createNo();
191:	}
192:
193:	public function isFalse(): TrinaryLogic
194:	{
195:	return TrinaryLogic::createNo();
196:	}
197:
198:	public function isBoolean(): TrinaryLogic
199:	{
200:	return TrinaryLogic::createNo();
201:	}
202:
203:	public function isFloat(): TrinaryLogic
204:	{
205:	return TrinaryLogic::createNo();
206:	}
207:
208:	public function isInteger(): TrinaryLogic
209:	{
210:	return TrinaryLogic::createNo();
211:	}
212:
213:	public function isString(): TrinaryLogic
214:	{
215:	return TrinaryLogic::createYes();
216:	}
217:
218:	public function isNumericString(): TrinaryLogic
219:	{
220:	return TrinaryLogic::createMaybe();
221:	}
222:
223:	public function isNonEmptyString(): TrinaryLogic
224:	{
225:	return TrinaryLogic::createMaybe();
226:	}
227:
228:	public function isNonFalsyString(): TrinaryLogic
229:	{
230:	return TrinaryLogic::createMaybe();
231:	}
232:
233:	public function isLiteralString(): TrinaryLogic
234:	{
235:	return TrinaryLogic::createMaybe();
236:	}
237:
238:	public function isLowercaseString(): TrinaryLogic
239:	{
240:	return TrinaryLogic::createMaybe();
241:	}
242:
243:	public function isClassString(): TrinaryLogic
244:	{
245:	return TrinaryLogic::createMaybe();
246:	}
247:
248:	public function getClassStringObjectType(): Type
249:	{
250:	return new ObjectWithoutClassType();
251:	}
252:
253:	public function getObjectTypeOrClassStringObjectType(): Type
254:	{
255:	return new ObjectWithoutClassType();
256:	}
257:
258:	public function isScalar(): TrinaryLogic
259:	{
260:	return TrinaryLogic::createYes();
261:	}
262:
263:	public function looseCompare(Type $type, PhpVersion $phpVersion): BooleanType
264:	{
265:	return new BooleanType();
266:	}
267:
268:	public function hasMethod(string $methodName): TrinaryLogic
269:	{
270:	if ($this->isClassString()->yes()) {
271:	return TrinaryLogic::createMaybe();
272:	}
273:	return TrinaryLogic::createNo();
274:	}
275:
276:	public function tryRemove(Type $typeToRemove): ?Type
277:	{
278:	if ($typeToRemove instanceof ConstantStringType && $typeToRemove->getValue() === '') {
279:	return TypeCombinator::intersect($this, new AccessoryNonEmptyStringType());
280:	}
281:
282:	if ($typeToRemove instanceof AccessoryNonEmptyStringType) {
283:	return new ConstantStringType('');
284:	}
285:
286:	return null;
287:	}
288:
289:	public function getFiniteTypes(): array
290:	{
291:	return [];
292:	}
293:
294:	public function exponentiate(Type $exponent): Type
295:	{
296:	return ExponentiateHelper::exponentiate($this, $exponent);
297:	}
298:
299:	public function toPhpDocNode(): TypeNode
300:	{
301:	return new IdentifierTypeNode('string');
302:	}
303:
304:	}
305:

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