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Add support to rewriter for free-function declarations and definitions. (#2120)

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This commit is contained in:
Andy Soffer
2022-09-09 13:30:23 -07:00
committed by GitHub
parent 82f8556890
commit 1b4544ffed
3 changed files with 153 additions and 4 deletions
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migrate_cpp/rewriter_test.cpp
+53
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@@ -131,5 +131,58 @@ TEST(Rewriter, DeclarationComma) {
"let y: i32 = 5678;\n");
}
TEST(Rewriter, FunctionDeclaration) {
// Function declarations and definitions returning void.
EXPECT_EQ(RewriteText("void f();"), "fn f() -> ();\n");
EXPECT_EQ(RewriteText("void f() {}"),
"fn f() -> () {\n"
"}\n");
// Function declarations and definitions returning int.
EXPECT_EQ(RewriteText("int f();"), "fn f() -> i32;\n");
EXPECT_EQ(RewriteText("int f() { return 0; }"),
"fn f() -> i32 {\n"
"return 0;\n"
"}\n");
// Function declarations and definitions with a single parameter.
EXPECT_EQ(RewriteText("int f(bool);"), "fn f(_: bool) -> i32;\n");
EXPECT_EQ(RewriteText("int f(bool b);"), "fn f(b: bool) -> i32;\n");
EXPECT_EQ(RewriteText("int f(bool) { return 0; }"),
"fn f(_: bool) -> i32 {\n"
"return 0;\n"
"}\n");
EXPECT_EQ(RewriteText("int f(bool b) { return 0; }"),
"fn f(b: bool) -> i32 {\n"
"return 0;\n"
"}\n");
// Function declarations and definitions with a multiple parameters.
EXPECT_EQ(RewriteText("int f(bool, int);"),
"fn f(_: bool, _: i32) -> i32;\n");
EXPECT_EQ(RewriteText("int f(bool b, int n);"),
"fn f(b: bool, n: i32) -> i32;\n");
EXPECT_EQ(RewriteText("int f(bool, int n) { return 0; }"),
"fn f(_: bool, n: i32) -> i32 {\n"
"return 0;\n"
"}\n");
EXPECT_EQ(RewriteText("int f(bool b, int n) { return 0; }"),
"fn f(b: bool, n: i32) -> i32 {\n"
"return 0;\n"
"}\n");
EXPECT_EQ(RewriteText("int f(bool b, int n = 3) { return n; }"),
"fn f(b: bool, n: i32 = 3) -> i32 {\n"
"return n;\n"
"}\n");
// Function declarations with trailing-return syntax.
EXPECT_EQ(RewriteText("auto f(bool b, int n = 3) -> int;"),
"fn f(b: bool, n: i32 = 3) -> i32;\n");
EXPECT_EQ(RewriteText("auto f(bool b, int n = 3) -> int { return n; }"),
"fn f(b: bool, n: i32 = 3) -> i32 {\n"
"return n;\n"
"}\n");
}
} // namespace
} // namespace Carbon::Testing