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#
# Tests of invalid return flow
#
# Copyright © 2022 Samuel Lidén Borell <samuel@kodafritt.se>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ERROR .6: error: Function is missing a return value (in one or more cases)
func badretflow_empty() -> bool
{
}
# ERROR .6: error: Function is missing a return value (in one or more cases)
func badretflow_if(int choice) -> bool
{
if choice == 1 return false
}
# ERROR .6: error: Function is missing a return value (in one or more cases)
func badretflow_else1(int choice) -> bool
{
if choice == 1 return false
else { }
}
# ERROR .6: error: Function is missing a return value (in one or more cases)
func badretflow_else2(int choice) -> bool
{
if choice == 1 { }
else return true
}
# ERROR .6: error: Function is missing a return value (in one or more cases)
func badretflow_elseif1(int choice) -> bool
{
if choice == 1 return false
else if choice == 2 return true
else if choice == 3 return false
else if choice == 4 return true
else { }
}
# ERROR .6: error: Function is missing a return value (in one or more cases)
func badretflow_elseif2(int choice) -> bool
{
if choice == 1 return false
else if choice == 2 return true
else if choice == 3 { }
else if choice == 4 return true
else return true
}
func badretflow_elseif3(int choice) -> bool
{
if choice == 1 return false
else return true
# ERROR .5: warning: Unreachable statement
return false
}
func badretflow_elseif4(int choice) -> bool
{
if choice == 1 return false
else if choice == 2 return true
else if choice == 3 return true
else return true
# ERROR .5: warning: Unreachable statement
return false
}
func badretflow_block(int choice) -> bool
{
{
if choice == 1 return false
else if choice == 2 return true
else if choice == 3 return true
else return true
}
# ERROR .5: warning: Unreachable statement
return false
}
# ERROR .6: error: Function is missing a return value (in one or more cases)
func badretflow_switch1(int x, int y) -> int
{
switch x {
case 1:
if y < 0 return 1
else if y > 0 return -1
default:
return 99
}
}
# ERROR .6: error: Function is missing a return value (in one or more cases)
func badretflow_switch2(int x, int y) -> int
{
switch x {
case 1:
return 11
default:
if y < 0 return 1
else if y > 0 return -1
}
}
# ERROR .6: error: Function is missing a return value (in one or more cases)
func badretflow_switch3(int x) -> int
{
switch x {
case 1:
return 11
}
}
# ERROR .6: error: Function is missing a return value (in one or more cases)
func badretflow_switch4(int x) -> int
{
switch x {
case 1:
return 11
case 2:
return 22
}
}
# ERROR .6: error: Function is missing a return value (in one or more cases)
func badretflow_switch5(int x, int y) -> int
{
if x < 0 {
switch y {
case 1:
return 1
case 2:
return 2
case 3:
return 3
default:
return 9
}
} else if x < 10 {
return 123
} else if x < 0 {
switch y {
case 1:
return 11
case 2:
# no return!
assert x != y
default:
return 99
}
} else {
switch y {
case 1:
return 111
default:
return 999
}
}
}
func badretflow_switch6(int x) -> int
{
switch x {
case 1:
return 11
case 2:
return 22
default:
return 99
}
# ERROR .5: warning: Unreachable statement
return 123
}
# ERROR .6: error: Function is missing a return value (in one or more cases)
func badretflow_gototarget_last(int choice) -> bool
{
if choice == 1 goto skip
return true
skip:
}
func badretflow_unreachable_after_goto(int choice) -> bool
{
again:
# ERROR .5: warning: Unreachable statements after goto
goto again
return true
}
func badretflow_goto_without_predecessor1(int choice) -> bool
{
return true
# ERROR .3: error: goto target has no clear predecessor
oops:
if choice == 2 return true
goto oops
}
func badretflow_goto_without_predecessor2(int choice) -> bool
{
while true { }
# ERROR .3: error: goto target has no clear predecessor
oops:
if choice == 2 return true
goto oops
}
func badretflow_goto_without_predecessor3(int choice) -> int
{
if choice == 1 return 11
else if choice == 2 return 22
else goto out
# ERROR .3: error: goto target has no clear predecessor
back:
return 33
out:
goto back
}
func badretflow_while_last(int choice) -> bool
{
if choice == 1 return false
# ERROR .5: warning: Unreachable statements after return
return true
do {
if choice == 2 return true
} while false
}
func badretflow_while_endless1(int choice) -> bool
{
# ERROR .5: warning: Unreachable statements after while true { }
while true { }
return false
}
func badretflow_while_endless2(int choice) -> bool
{
# ERROR .5: warning: Unreachable statements after do { } while true
do {
} while true
return false
}
# ERROR .6: error: Function is missing a return value (in one or more cases)
func badretflow_while_not_endless1(int choice) -> bool
{
while true {
if choice == 2 break
}
}
# ERROR .6: error: Function is missing a return value (in one or more cases)
func badretflow_while_not_endless2(int choice) -> bool
{
while false { }
}
# ERROR .6: error: Function is missing a return value (in one or more cases)
func badretflow_while_not_endless3(int choice) -> bool
{
do {
if choice == 2 break
} while true
}
func badretflow_while_not_endless4(int choice) -> bool
{
# ERROR .5: warning: Unreachable statements after do { } while true
do {
if choice == 2 goto end
} while true
return false
end:
return true
}
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