1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
package org.shedlang.compiler.shid;
import org.junit.jupiter.api.Test;
import org.shedlang.compiler.ast.typed.Typed;
import org.shedlang.compiler.types.Types;
import java.util.List;
import static org.shedlang.compiler.shid.instructions.ShidMatchers.*;
import static org.zwobble.precisely.AssertThat.assertThat;
import static org.zwobble.precisely.Matchers.isSequence;
public class ShidCodeGenIfTests {
@Test
public void ifWithSingleConditionalBranchIsCompiledToSingleIfInstruction() {
var node = Typed.if_(
List.of(
Typed.conditionalBranch(
Typed.reference("c"),
Typed.block(List.of(
Typed.blockReturn(Typed.intLiteral(42))
))
)
),
Typed.block(List.of(
Typed.functionReturn(Typed.stringLiteral("x"))
)),
Types.INT
);
var context = ShidCodeGen.Context.EMPTY
.addShedVal("c");
var result = ShidCodeGen.compileExpression(node, context);
assertThat(result.instructions(), isSequence(
isShidLocalLoad("c__0"),
isShidIf(
isShidBlock(isSequence(
isShidPushInt(42)
)),
isShidBlock(isSequence(
isShidBlock(isSequence(
isShidPushString("x"),
isShidReturn()
))
))
)
));
}
@Test
public void ifWithMultipleConditionalBranchesIsCompiledToNestedIfInstructions() {
var node = Typed.if_(
List.of(
Typed.conditionalBranch(
Typed.reference("c"),
Typed.block(List.of(
Typed.blockReturn(Typed.intLiteral(42))
))
),
Typed.conditionalBranch(
Typed.reference("d"),
Typed.block(List.of(
Typed.blockReturn(Typed.intLiteral(1))
))
)
),
Typed.block(List.of(
Typed.functionReturn(Typed.stringLiteral("x"))
)),
Types.INT
);
var context = ShidCodeGen.Context.EMPTY
.addShedVal("c")
.addShedVal("d");
var result = ShidCodeGen.compileExpression(node, context);
assertThat(result.instructions(), isSequence(
isShidLocalLoad("c__0"),
isShidIf(
isShidBlock(isSequence(
isShidPushInt(42)
)),
isShidBlock(isSequence(
isShidLocalLoad("d__0"),
isShidIf(
isShidBlock(isSequence(
isShidPushInt(1)
)),
isShidBlock(isSequence(
isShidBlock(isSequence(
isShidPushString("x"),
isShidReturn()
))
))
)
))
)
));
}
}
|
