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Merge branch 'master' into merge

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This commit is contained in:
Aaron Weiss 2023-09-22 11:12:44 -07:00
commit d4de6f7502
5 changed files with 787 additions and 18 deletions
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1
.github/workflows/benchmark.yml vendored
View File

@ -25,6 +25,7 @@ jobs:
- name: Install valgrind
run: |
sudo apt-get update
sudo apt-get install valgrind
- name: Build Luau (gcc)

4
Analysis/include/Luau/ControlFlow.h
View File

@ -14,8 +14,8 @@ enum class ControlFlow
None = 0b00001,
Returns = 0b00010,
Throws = 0b00100,
Break = 0b01000, // Currently unused.
Continue = 0b10000, // Currently unused.
Breaks = 0b01000,
Continues = 0b10000,
};
inline ControlFlow operator&(ControlFlow a, ControlFlow b)

18
Analysis/src/ConstraintGraphBuilder.cpp
View File

@ -24,6 +24,7 @@ LUAU_FASTINT(LuauCheckRecursionLimit);
LUAU_FASTFLAG(DebugLuauLogSolverToJson);
LUAU_FASTFLAG(DebugLuauMagicTypes);
LUAU_FASTFLAG(LuauParseDeclareClassIndexer);
LUAU_FASTFLAG(LuauLoopControlFlowAnalysis);
LUAU_FASTFLAG(LuauFloorDivision);
namespace Luau
@ -537,11 +538,10 @@ ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStat* stat)
return visit(scope, s);
else if (auto s = stat->as<AstStatRepeat>())
return visit(scope, s);
else if (stat->is<AstStatBreak>() || stat->is<AstStatContinue>())
{
// Nothing
return ControlFlow::None; // TODO: ControlFlow::Break/Continue
}
else if (stat->is<AstStatBreak>())
return FFlag::LuauLoopControlFlowAnalysis ? ControlFlow::Breaks : ControlFlow::None;
else if (stat->is<AstStatContinue>())
return FFlag::LuauLoopControlFlowAnalysis ? ControlFlow::Continues : ControlFlow::None;
else if (auto r = stat->as<AstStatReturn>())
return visit(scope, r);
else if (auto e = stat->as<AstStatExpr>())
@ -1072,12 +1072,14 @@ ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatIf* ifSt
if (ifStatement->elsebody)
elsecf = visit(elseScope, ifStatement->elsebody);
if (matches(thencf, ControlFlow::Returns | ControlFlow::Throws) && elsecf == ControlFlow::None)
if (thencf != ControlFlow::None && elsecf == ControlFlow::None)
scope->inheritRefinements(elseScope);
else if (thencf == ControlFlow::None && matches(elsecf, ControlFlow::Returns | ControlFlow::Throws))
else if (thencf == ControlFlow::None && elsecf != ControlFlow::None)
scope->inheritRefinements(thenScope);
if (matches(thencf, ControlFlow::Returns | ControlFlow::Throws) && matches(elsecf, ControlFlow::Returns | ControlFlow::Throws))
if (FFlag::LuauLoopControlFlowAnalysis && thencf == elsecf)
return thencf;
else if (matches(thencf, ControlFlow::Returns | ControlFlow::Throws) && matches(elsecf, ControlFlow::Returns | ControlFlow::Throws))
return ControlFlow::Returns;
else
return ControlFlow::None;

18
Analysis/src/TypeInfer.cpp
View File

@ -38,6 +38,7 @@ LUAU_FASTFLAG(LuauInstantiateInSubtyping)
LUAU_FASTFLAGVARIABLE(LuauAllowIndexClassParameters, false)
LUAU_FASTFLAG(LuauOccursIsntAlwaysFailure)
LUAU_FASTFLAGVARIABLE(LuauTinyControlFlowAnalysis, false)
LUAU_FASTFLAGVARIABLE(LuauLoopControlFlowAnalysis, false)
LUAU_FASTFLAGVARIABLE(LuauVariadicOverloadFix, false)
LUAU_FASTFLAGVARIABLE(LuauAlwaysCommitInferencesOfFunctionCalls, false)
LUAU_FASTFLAG(LuauParseDeclareClassIndexer)
@ -350,11 +351,10 @@ ControlFlow TypeChecker::check(const ScopePtr& scope, const AstStat& program)
return check(scope, *while_);
else if (auto repeat = program.as<AstStatRepeat>())
return check(scope, *repeat);
else if (program.is<AstStatBreak>() || program.is<AstStatContinue>())
{
// Nothing to do
return ControlFlow::None;
}
else if (program.is<AstStatBreak>())
return FFlag::LuauLoopControlFlowAnalysis ? ControlFlow::Breaks : ControlFlow::None;
else if (program.is<AstStatContinue>())
return FFlag::LuauLoopControlFlowAnalysis ? ControlFlow::Continues : ControlFlow::None;
else if (auto return_ = program.as<AstStatReturn>())
return check(scope, *return_);
else if (auto expr = program.as<AstStatExpr>())
@ -752,12 +752,14 @@ ControlFlow TypeChecker::check(const ScopePtr& scope, const AstStatIf& statement
if (statement.elsebody)
elsecf = check(elseScope, *statement.elsebody);
if (matches(thencf, ControlFlow::Returns | ControlFlow::Throws) && elsecf == ControlFlow::None)
if (thencf != ControlFlow::None && elsecf == ControlFlow::None)
scope->inheritRefinements(elseScope);
else if (thencf == ControlFlow::None && matches(elsecf, ControlFlow::Returns | ControlFlow::Throws))
else if (thencf == ControlFlow::None && elsecf != ControlFlow::None)
scope->inheritRefinements(thenScope);
if (matches(thencf, ControlFlow::Returns | ControlFlow::Throws) && matches(elsecf, ControlFlow::Returns | ControlFlow::Throws))
if (FFlag::LuauLoopControlFlowAnalysis && thencf == elsecf)
return thencf;
else if (matches(thencf, ControlFlow::Returns | ControlFlow::Throws) && matches(elsecf, ControlFlow::Returns | ControlFlow::Throws))
return ControlFlow::Returns;
else
return ControlFlow::None;

764
tests/TypeInfer.cfa.test.cpp
View File

@ -26,6 +26,52 @@ TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return")
CHECK_EQ("string", toString(requireTypeAtPosition({6, 24})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_break")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}})
for _, record in x do
if not record.value then
break
end
local foo = record.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({7, 34})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_continue")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}})
for _, record in x do
if not record.value then
continue
end
local foo = record.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({7, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return_elif_not_y_return")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
@ -48,6 +94,118 @@ TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return_elif_not_y_return")
CHECK_EQ("string", toString(requireTypeAtPosition({9, 24})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_break_elif_not_y_break")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}}, y: {{value: string?}})
for i, recordX in x do
local recordY = y[i]
if not recordX.value then
break
elseif not recordY.value then
break
end
local foo = recordX.value
local bar = recordY.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({10, 38})));
CHECK_EQ("string", toString(requireTypeAtPosition({11, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_continue_elif_not_y_continue")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}}, y: {{value: string?}})
for i, recordX in x do
local recordY = y[i]
if not recordX.value then
continue
elseif not recordY.value then
continue
end
local foo = recordX.value
local bar = recordY.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({10, 38})));
CHECK_EQ("string", toString(requireTypeAtPosition({11, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return_elif_not_y_break")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}}, y: {{value: string?}})
for i, recordX in x do
local recordY = y[i]
if not recordX.value then
return
elseif not recordY.value then
break
end
local foo = recordX.value
local bar = recordY.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({10, 38})));
CHECK_EQ("string", toString(requireTypeAtPosition({11, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_break_elif_not_y_continue")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}}, y: {{value: string?}})
for i, recordX in x do
local recordY = y[i]
if not recordX.value then
break
elseif not recordY.value then
continue
end
local foo = recordX.value
local bar = recordY.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({10, 38})));
CHECK_EQ("string", toString(requireTypeAtPosition({11, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return_elif_rand_return_elif_not_y_return")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
@ -72,6 +230,66 @@ TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return_elif_rand_return_elif_not_y_
CHECK_EQ("string", toString(requireTypeAtPosition({11, 24})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_break_elif_rand_break_elif_not_y_break")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}}, y: {{value: string?}})
for i, recordX in x do
local recordY = y[i]
if not recordX.value then
break
elseif math.random() > 0.5 then
break
elseif not recordY.value then
break
end
local foo = recordX.value
local bar = recordY.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({12, 38})));
CHECK_EQ("string", toString(requireTypeAtPosition({13, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_continue_elif_rand_continue_elif_not_y_continue")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}}, y: {{value: string?}})
for i, recordX in x do
local recordY = y[i]
if not recordX.value then
continue
elseif math.random() > 0.5 then
continue
elseif not recordY.value then
continue
end
local foo = recordX.value
local bar = recordY.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({12, 38})));
CHECK_EQ("string", toString(requireTypeAtPosition({13, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return_elif_not_rand_return_elif_not_y_fallthrough")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
@ -96,6 +314,66 @@ TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return_elif_not_rand_return_elif_no
CHECK_EQ("string?", toString(requireTypeAtPosition({11, 24})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_break_elif_rand_break_elif_not_y_fallthrough")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}}, y: {{value: string?}})
for i, recordX in x do
local recordY = y[i]
if not recordX.value then
break
elseif math.random() > 0.5 then
break
elseif not recordY.value then
end
local foo = recordX.value
local bar = recordY.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({12, 38})));
CHECK_EQ("string?", toString(requireTypeAtPosition({13, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_continue_elif_rand_continue_elif_not_y_fallthrough")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}}, y: {{value: string?}})
for i, recordX in x do
local recordY = y[i]
if not recordX.value then
continue
elseif math.random() > 0.5 then
continue
elseif not recordY.value then
end
local foo = recordX.value
local bar = recordY.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({12, 38})));
CHECK_EQ("string?", toString(requireTypeAtPosition({13, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return_elif_not_y_fallthrough_elif_not_z_return")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
@ -122,6 +400,138 @@ TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return_elif_not_y_fallthrough_elif_
CHECK_EQ("string?", toString(requireTypeAtPosition({12, 24})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_break_elif_not_y_fallthrough_elif_not_z_break")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}}, y: {{value: string?}}, z: {{value: string?}})
for i, recordX in x do
local recordY = y[i]
local recordZ = y[i]
if not recordX.value then
break
elseif not recordY.value then
elseif not recordZ.value then
break
end
local foo = recordX.value
local bar = recordY.value
local baz = recordZ.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({13, 38})));
CHECK_EQ("string?", toString(requireTypeAtPosition({14, 38})));
CHECK_EQ("string?", toString(requireTypeAtPosition({15, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_continue_elif_not_y_fallthrough_elif_not_z_continue")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}}, y: {{value: string?}}, z: {{value: string?}})
for i, recordX in x do
local recordY = y[i]
local recordZ = y[i]
if not recordX.value then
continue
elseif not recordY.value then
elseif not recordZ.value then
continue
end
local foo = recordX.value
local bar = recordY.value
local baz = recordZ.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({13, 38})));
CHECK_EQ("string?", toString(requireTypeAtPosition({14, 38})));
CHECK_EQ("string?", toString(requireTypeAtPosition({15, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_continue_elif_not_y_throw_elif_not_z_fallthrough")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}}, y: {{value: string?}}, z: {{value: string?}})
for i, recordX in x do
local recordY = y[i]
local recordZ = y[i]
if not recordX.value then
continue
elseif not recordY.value then
error("Y value not defined")
elseif not recordZ.value then
end
local foo = recordX.value
local bar = recordY.value
local baz = recordZ.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({13, 38})));
CHECK_EQ("string", toString(requireTypeAtPosition({14, 38})));
CHECK_EQ("string?", toString(requireTypeAtPosition({15, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return_elif_not_y_fallthrough_elif_not_z_break")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}}, y: {{value: string?}}, z: {{value: string?}})
for i, recordX in x do
local recordY = y[i]
local recordZ = y[i]
if not recordX.value then
return
elseif not recordY.value then
elseif not recordZ.value then
break
end
local foo = recordX.value
local bar = recordY.value
local baz = recordZ.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({13, 38})));
CHECK_EQ("string?", toString(requireTypeAtPosition({14, 38})));
CHECK_EQ("string?", toString(requireTypeAtPosition({15, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "do_if_not_x_return")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
@ -142,6 +552,56 @@ TEST_CASE_FIXTURE(BuiltinsFixture, "do_if_not_x_return")
CHECK_EQ("string", toString(requireTypeAtPosition({8, 24})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "for_record_do_if_not_x_break")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}})
for _, record in x do
do
if not record.value then
break
end
end
local foo = record.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({9, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "for_record_do_if_not_x_continue")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}})
for _, record in x do
do
if not record.value then
continue
end
end
local foo = record.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({9, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "early_return_in_a_loop_which_isnt_guaranteed_to_run_first")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
@ -271,6 +731,126 @@ TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return_if_not_y_return")
CHECK_EQ("string", toString(requireTypeAtPosition({11, 24})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_break_if_not_y_break")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}}, y: {{value: string?}})
for i, recordX in x do
local recordY = y[i]
if not recordX.value then
break
end
if not recordY.value then
break
end
local foo = recordX.value
local bar = recordY.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({12, 38})));
CHECK_EQ("string", toString(requireTypeAtPosition({13, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_continue_if_not_y_continue")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}}, y: {{value: string?}})
for i, recordX in x do
local recordY = y[i]
if not recordX.value then
continue
end
if not recordY.value then
continue
end
local foo = recordX.value
local bar = recordY.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({12, 38})));
CHECK_EQ("string", toString(requireTypeAtPosition({13, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_continue_if_not_y_throw")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}}, y: {{value: string?}})
for i, recordX in x do
local recordY = y[i]
if not recordX.value then
continue
end
if not recordY.value then
error("Y value not defined")
end
local foo = recordX.value
local bar = recordY.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({12, 38})));
CHECK_EQ("string", toString(requireTypeAtPosition({13, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_break_if_not_y_continue")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}}, y: {{value: string?}})
for i, recordX in x do
local recordY = y[i]
if not recordX.value then
break
end
if not recordY.value then
continue
end
local foo = recordX.value
local bar = recordY.value
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({12, 38})));
CHECK_EQ("string", toString(requireTypeAtPosition({13, 38})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "type_alias_does_not_leak_out")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
@ -294,6 +874,62 @@ TEST_CASE_FIXTURE(BuiltinsFixture, "type_alias_does_not_leak_out")
CHECK_EQ("nil", toString(requireTypeAtPosition({8, 29})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "type_alias_does_not_leak_out_breaking")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}})
for _, record in x do
if typeof(record.value) == "string" then
break
else
type Foo = number
end
local foo: Foo = record.value
end
end
)");
LUAU_REQUIRE_ERROR_COUNT(1, result);
CHECK_EQ("Unknown type 'Foo'", toString(result.errors[0]));
CHECK_EQ("nil", toString(requireTypeAtPosition({9, 43})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "type_alias_does_not_leak_out_continuing")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}})
for _, record in x do
if typeof(record.value) == "string" then
continue
else
type Foo = number
end
local foo: Foo = record.value
end
end
)");
LUAU_REQUIRE_ERROR_COUNT(1, result);
CHECK_EQ("Unknown type 'Foo'", toString(result.errors[0]));
CHECK_EQ("nil", toString(requireTypeAtPosition({9, 43})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "prototyping_and_visiting_alias_has_the_same_scope")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
@ -320,6 +956,62 @@ TEST_CASE_FIXTURE(BuiltinsFixture, "prototyping_and_visiting_alias_has_the_same_
CHECK_EQ("nil", toString(requireTypeAtPosition({8, 29})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "prototyping_and_visiting_alias_has_the_same_scope_breaking")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}})
for _, record in x do
type Foo = number
if typeof(record.value) == "string" then
break
end
local foo: Foo = record.value
end
end
)");
LUAU_REQUIRE_ERROR_COUNT(1, result);
CHECK_EQ("Type 'nil' could not be converted into 'number'", toString(result.errors[0]));
CHECK_EQ("nil", toString(requireTypeAtPosition({9, 43})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "prototyping_and_visiting_alias_has_the_same_scope_continuing")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
local function f(x: {{value: string?}})
for _, record in x do
type Foo = number
if typeof(record.value) == "string" then
continue
end
local foo: Foo = record.value
end
end
)");
LUAU_REQUIRE_ERROR_COUNT(1, result);
CHECK_EQ("Type 'nil' could not be converted into 'number'", toString(result.errors[0]));
CHECK_EQ("nil", toString(requireTypeAtPosition({9, 43})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "tagged_unions")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
@ -355,6 +1047,78 @@ TEST_CASE_FIXTURE(BuiltinsFixture, "tagged_unions")
CHECK_EQ("Err<E>", toString(requireTypeAtPosition({16, 19})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "tagged_unions_breaking")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
type Ok<T> = { tag: "ok", value: T }
type Err<E> = { tag: "err", error: E }
type Result<T, E> = Ok<T> | Err<E>
local function process<T, E>(results: {Result<T, E>})
for _, result in results do
if result.tag == "ok" then
local tag = result.tag
local val = result.value
break
end
local tag = result.tag
local err = result.error
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("\"ok\"", toString(requireTypeAtPosition({8, 39})));
CHECK_EQ("T", toString(requireTypeAtPosition({9, 39})));
CHECK_EQ("\"err\"", toString(requireTypeAtPosition({14, 35})));
CHECK_EQ("E", toString(requireTypeAtPosition({15, 35})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "tagged_unions_continuing")
{
ScopedFastFlag flags[] = {
{"LuauTinyControlFlowAnalysis", true},
{"LuauLoopControlFlowAnalysis", true}
};
CheckResult result = check(R"(
type Ok<T> = { tag: "ok", value: T }
type Err<E> = { tag: "err", error: E }
type Result<T, E> = Ok<T> | Err<E>
local function process<T, E>(results: {Result<T, E>})
for _, result in results do
if result.tag == "ok" then
local tag = result.tag
local val = result.value
continue
end
local tag = result.tag
local err = result.error
end
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("\"ok\"", toString(requireTypeAtPosition({8, 39})));
CHECK_EQ("T", toString(requireTypeAtPosition({9, 39})));
CHECK_EQ("\"err\"", toString(requireTypeAtPosition({14, 35})));
CHECK_EQ("E", toString(requireTypeAtPosition({15, 35})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "do_assert_x")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};