Quiltflower 1.8.0

The changelog for this version is very long, so here are the highlights:

• Improved the quality and cleanliness of the output
• Many fixes to generics
• Many fixes to loops
• Dozens of bugs and crashes fixed

Click here to expand the full changelog

• Added ++/-- inlining when possible
• Added variable renaming when there's multiple variables with the same name
• Added switch statement brace enclosing when the multiple variables are in different case branches
• Added switch expression in assert support
• Added Implementation-Name: Quiltflower to jar manifest (thanks jnp!)
• Added formatting on complex if-else chains (thanks Earthcomputer!)
• Added basic switch pattern matching support for preview versions
• Changed some default options: generic signatures and synthetic members are now hidden by default, pattern matching is enabled, and ternary-in-if is disabled
• Improved default branch hiding on switches when it's an empty fallthrough
• Improved generic casts on ternaries
• Improved generic casts on assigns
• Improved ternary type inference when one branch is null
• Improved detection of explicit generic invocations, such as Comparator.<...>comparing()
• Improved variable merging in loops (improved variable liveness calculation)
• Improved if-else statement structure to prevent highly nested if-else statements
• Improved conversion of labeled continues to breaks to produce correct but cleaner code
• Improved if statements with a single labeled sequence by lifting the label to the if statement, making it clearer what is being jumped to by the label
• Improved the experimental try loop fix, now works better and doesn't break on random code
• Improved the IResultSaver API (thanks zml!)
• Improved pattern matching significantly
• Improved string concat support, now supports makeConcat as well as makeConcatWithConstants
• Improved infinite loop with return at the end condensing significantly better
• Improved labeled break -> continue resugaring
• Optimized excess memory usage
• Fixed <unknown> variables in foreach loops
• Fixed null being cast when it doesn't need to be
• Fixed constructor invocations having extra parenthesis
• Fixed switch expressions not having parenthesis around them when they should
• Fixed instances where variables were cast twice
• Fixed switch statements in finally blocks causing issues
• Fixed synchronized statements having a null argument when object is being assigned to null
• Fixed synchronized statements removing autoboxing
• Fixed method()[i] += 0; not being properly inlined
• Fixed copying files to directories not working properly
• Fixed boxing issues with field initializers
• Fixed rare crashes with inconsistent idom sequences
• Fixed continues becoming implicit when they should be explicit
• Fixed local classes not decompiling breaking entire file
• Fixed double brace initializers in java 17 placing extra modifiers on the braces
• Fixed some cases where stack variables created by the dup bytecode family were not simplified
• Fixed swap based constructor invocations
• Fixed cases where while loops were improperly created, moving a continue out of the loop
• Fixed case when there are 2 pops after a jump (thanks Kroppeb!)
• Fixed expression reordering in array initializes resulting in semantically different code (thanks Kroppeb!)
• Fixed phantom continue or break at the end of a loop
• Fixed statement graph ordering being incorrect in certain cases
• Fixed IndexOutOfBounds in ternary processing
• Fixed statement graph not discovering all nodes, leading to <unknown> variables
• Fixed improper loop elimination when the loop was required to make the output correct
• Fixed generics not casting on super keyword (contravariance)
• Fixed open file systems not being closed (thanks CoolMineman!)
• Fixed decompilation error with kotlin when enums (thanks Juuz!)