Static evaluation of activators

[Tishka17]

/closes #642

[Stefanqn]

def is_zero(value: int) -> bool:
    return value == 0
def fallback() -> str:
    return "a"
def needs_float(value: float) -> str:
    return str(value)

def test_surprise():
    provider = Provider(scope=Scope.APP)
    provider.provide(lambda: 1, provides=int)
    provider.activate(is_zero, Marker("ZERO")) # false
    provider.provide(fallback, provides=str)
    provider.provide(needs_float, provides=str, when=Marker("ZERO"))
    container = make_container(provider)

[Tishka17]

@Stefanqn Static evaluation has limitations. I do not think calling arbitrary factories is safe at the moment of graph building. I will describe this in doc

[Stefanqn]

how about runtime fallback in this case? #701

[github-actions]

Coverage report

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File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
src/dishka
async_container.py					359-365
container.py
container_objects.py					24
exceptions.py					44-45
registry.py					218, 277-283
src/dishka/code_tools
code_builder.py					243, 251
factory_compiler.py					144
src/dishka/dependency_source
activator.py					16
src/dishka/graph_builder
activation.py					61-63, 103, 117-118, 122, 134
builder.py
validator.py
src/dishka/provider
make_alias.py					40
make_decorator.py
provider.py
Project Total

This report was generated by python-coverage-comment-action

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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