[Merged by Bors] - Implement Generator Function Constructor

[raskad]

This Pull Request changes the following:

• Modify CreateDynamicFunction to work with generator functions.
• Add the name anonymus to functions created via CreateDynamicFunction to comply with the spec.
• Fix a bug in the Yield parser where the parser would expect a token when no token is a legal case.
• Change the Yield::new function to require less turbofishes.

[github-actions]

Test262 conformance changes

VM implementation

Test result	main count	PR count	difference
Total	90,847	90,847	0
Passed	59,784	59,814	+30
Ignored	14,012	14,012	0
Failed	17,051	17,021	-30
Panics	0	0	0
Conformance	65.81%	65.84%	+0.03%

Fixed tests (30):

test/built-ins/Function/instance-name.js [strict mode] (previously Failed)
test/built-ins/Function/instance-name.js (previously Failed)
test/built-ins/GeneratorFunction/instance-construct-throws.js [strict mode] (previously Failed)
test/built-ins/GeneratorFunction/instance-construct-throws.js (previously Failed)
test/built-ins/GeneratorFunction/invoked-as-function-no-arguments.js [strict mode] (previously Failed)
test/built-ins/GeneratorFunction/invoked-as-function-no-arguments.js (previously Failed)
test/built-ins/GeneratorFunction/invoked-as-function-multiple-arguments.js [strict mode] (previously Failed)
test/built-ins/GeneratorFunction/invoked-as-function-multiple-arguments.js (previously Failed)
test/built-ins/GeneratorFunction/invoked-as-function-single-argument.js [strict mode] (previously Failed)
test/built-ins/GeneratorFunction/invoked-as-function-single-argument.js (previously Failed)
test/built-ins/GeneratorFunction/proto-from-ctor-realm-prototype.js [strict mode] (previously Failed)
test/built-ins/GeneratorFunction/proto-from-ctor-realm-prototype.js (previously Failed)
test/built-ins/GeneratorFunction/instance-prototype.js [strict mode] (previously Failed)
test/built-ins/GeneratorFunction/instance-prototype.js (previously Failed)
test/built-ins/GeneratorFunction/invoked-as-constructor-no-arguments.js [strict mode] (previously Failed)
test/built-ins/GeneratorFunction/invoked-as-constructor-no-arguments.js (previously Failed)
test/built-ins/GeneratorFunction/instance-yield-expr-in-param.js [strict mode] (previously Failed)
test/built-ins/GeneratorFunction/instance-yield-expr-in-param.js (previously Failed)
test/built-ins/GeneratorFunction/instance-name.js [strict mode] (previously Failed)
test/built-ins/GeneratorFunction/instance-name.js (previously Failed)
test/built-ins/GeneratorFunction/instance-length.js [strict mode] (previously Failed)
test/built-ins/GeneratorFunction/instance-length.js (previously Failed)
test/built-ins/Proxy/construct/trap-is-undefined-proto-from-cross-realm-newtarget.js [strict mode] (previously Failed)
test/built-ins/Proxy/construct/trap-is-undefined-proto-from-cross-realm-newtarget.js (previously Failed)
test/language/statements/class/subclass/builtin-objects/GeneratorFunction/instance-prototype.js [strict mode] (previously Failed)
test/language/statements/class/subclass/builtin-objects/GeneratorFunction/instance-prototype.js (previously Failed)
test/language/expressions/import.meta/syntax/goal-generator-params-or-body.js [strict mode] (previously Failed)
test/language/expressions/import.meta/syntax/goal-generator-params-or-body.js (previously Failed)
test/language/expressions/instanceof/S15.3.5.3_A3_T2.js [strict mode] (previously Failed)
test/language/expressions/instanceof/S15.3.5.3_A3_T2.js (previously Failed)

[codecov]

Codecov Report

Merging #2174 (d4e4f8b) into main (44d3291) will decrease coverage by 0.00%.
The diff coverage is 22.85%.

@@            Coverage Diff             @@
##             main    #2174      +/-   ##
==========================================
- Coverage   41.90%   41.90%   -0.01%     
==========================================
  Files         231      231              
  Lines       21502    21501       -1     
==========================================
- Hits         9011     9010       -1     
  Misses      12491    12491              

Impacted Files	Coverage Δ
boa_engine/src/builtins/async_function/mod.rs	78.94% <ø> (ø)
boa_engine/src/builtins/function/mod.rs	25.66% <0.00%> (-0.28%)	⬇️
boa_engine/src/builtins/generator_function/mod.rs	80.95% <0.00%> (+10.11%)	⬆️
boa_interner/src/sym.rs	0.00% <ø> (ø)
...e/src/syntax/parser/expression/assignment/yield.rs	21.15% <50.00%> (-1.07%)	⬇️
boa_engine/src/vm/mod.rs	47.96% <50.00%> (-0.19%)	⬇️
boa_engine/src/vm/code_block.rs	37.57% <66.66%> (+0.07%)	⬆️
boa_engine/src/syntax/ast/node/yield/mod.rs	18.18% <100.00%> (ø)
...ngine/src/syntax/parser/statement/try_stm/catch.rs	45.67% <0.00%> (-2.47%)	⬇️
... and 3 more

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[Razican]

Looking good, just a couple of questions, for clarifications mostly :) thanks!

[HalidOdat]

Looks good to me!

[raskad]

bors r+

[bors]

Pull request successfully merged into main.

Build succeeded:

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