Fixed float literal parsing off-by-one and underscore handling (#31)

Amzd · web-flow · commit a56e2282a662 · 2025-07-28T00:00:31.000+10:00
diff --git a/Sources/MacroToolkit/FloatLiteral.swift b/Sources/MacroToolkit/FloatLiteral.swift
@@ -100,7 +100,7 @@ public struct FloatLiteral: LiteralProtocol {
 
             fractionalPartValue =
                 Double(fractionalPartDigitsValue)
-                / pow(Double(radix), Double(fractionalPart.count - 1))
+                / pow(Double(radix), Double(fractionalPartWithoutUnderscores.count))
         } else {
             fractionalPartValue = 0
         }
diff --git a/Tests/MacroToolkitTests/MacroToolkitTests.swift b/Tests/MacroToolkitTests/MacroToolkitTests.swift
@@ -360,6 +360,9 @@ final class MacroToolkitTests: XCTestCase {
         XCTAssertEqual(FloatLiteral(hexFloatLiteral)?.value, -0xFp-2_)
         XCTAssertEqual(
             FloatLiteral(hexFloatLiteralWithFractional)?.value, -0xF.0f_ep-2_, "Fair enough")
+        
+        XCTAssertEqual(FloatLiteral("1.1" as ExprSyntax)?.value, 1.1)
+        XCTAssertEqual(FloatLiteral("10.02" as ExprSyntax)?.value, 10.02)
     }
 
     func testStringLiteralParsing() {

Original file line number	Diff line number	Diff line change
`@@ -100,7 +100,7 @@ public struct FloatLiteral: LiteralProtocol {`
`100`	`100`
`101`	`101`	`fractionalPartValue =`
`102`	`102`	`Double(fractionalPartDigitsValue)`
`103`		`- / pow(Double(radix), Double(fractionalPart.count - 1))`
	`103`	`+ / pow(Double(radix), Double(fractionalPartWithoutUnderscores.count))`
`104`	`104`	`} else {`
`105`	`105`	`fractionalPartValue = 0`
`106`	`106`	`}`
Original file line number	Diff line number	Diff line change
`@@ -360,6 +360,9 @@ final class MacroToolkitTests: XCTestCase {`
`360`	`360`	`XCTAssertEqual(FloatLiteral(hexFloatLiteral)?.value, -0xFp-2_)`
`361`	`361`	`XCTAssertEqual(`
`362`	`362`	`FloatLiteral(hexFloatLiteralWithFractional)?.value, -0xF.0f_ep-2_, "Fair enough")`
	`363`	`+`
	`364`	`+ XCTAssertEqual(FloatLiteral("1.1" as ExprSyntax)?.value, 1.1)`
	`365`	`+ XCTAssertEqual(FloatLiteral("10.02" as ExprSyntax)?.value, 10.02)`
`363`	`366`	`}`
`364`	`367`
`365`	`368`	`func testStringLiteralParsing() {`