Implement ScalarFloatHandler

src/Analyser/Generator/ExprHandler/ScalarFloatHandler.php

@@ -0,0 +1,53 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Analyser\Generator\ExprHandler;
+
+use Generator;
+use PhpParser\Node\Expr;
+use PhpParser\Node\Scalar\Float_;
+use PhpParser\Node\Stmt;
+use PHPStan\Analyser\ExpressionContext;
+use PHPStan\Analyser\Generator\ExprAnalysisResult;
+use PHPStan\Analyser\Generator\ExprHandler;
+use PHPStan\Analyser\Generator\GeneratorScope;
+use PHPStan\Analyser\SpecifiedTypes;
+use PHPStan\DependencyInjection\AutowiredService;
+use PHPStan\Type\Constant\ConstantFloatType;
+
+/**
+ * @implements ExprHandler<Float_>
+ */
+#[AutowiredService]
+final class ScalarFloatHandler implements ExprHandler
+{
+
+	public function supports(Expr $expr): bool
+	{
+		return $expr instanceof Float_;
+	}
+
+	public function analyseExpr(
+		Stmt $stmt,
+		Expr $expr,
+		GeneratorScope $scope,
+		ExpressionContext $context,
+		?callable $alternativeNodeCallback,
+	): Generator
+	{
+		yield from [];
+		$type = new ConstantFloatType($expr->value);
+		return new ExprAnalysisResult(
+			$type,
+			$type,
+			$scope,
+			hasYield: false,
+			isAlwaysTerminating: false,
+			throwPoints: [],
+			impurePoints: [],
+			specifiedTruthyTypes: new SpecifiedTypes(),
+			specifiedFalseyTypes: new SpecifiedTypes(),
+			specifiedNullTypes: new SpecifiedTypes(),
+		);
+	}
+
+}

tests/PHPStan/Analyser/Generator/data/gnsr.php

@@ -269,6 +269,9 @@ function doCast() {
 		assertType('1.0', (double) $a);
 		assertType('true', (bool) $a);
 		assertType("'1'", (string) $a);
+
+		$f = 1.1;
+		assertType('1', (int) $f);
 	}
 
 	/**