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Parsing support for function return types.

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This commit is contained in:
Richard Smith
2021-04-21 17:53:54 -07:00
parent 2726865940
commit 7a74ac18a7
3 changed files with 42 additions and 6 deletions
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parser/parse_tree_test.cpp
+31
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@@ -196,6 +196,37 @@ TEST_F(ParseTreeTest, FunctionDefinitionWithParameterList) {
MatchFileEnd()}));
}
TEST_F(ParseTreeTest, FunctionDeclarationWithReturnType) {
TokenizedBuffer tokens = GetTokenizedBuffer("fn foo() -> Int;");
ParseTree tree = ParseTree::Parse(tokens, consumer);
EXPECT_FALSE(tree.HasErrors());
EXPECT_THAT(
tree,
MatchParseTreeNodes(
{MatchFunctionDeclaration(MatchDeclaredName("foo"), MatchParameters(),
MatchReturnType(MatchNameReference("Int")),
MatchDeclarationEnd()),
MatchFileEnd()}));
}
TEST_F(ParseTreeTest, FunctionDefinitionWithReturnType) {
TokenizedBuffer tokens = GetTokenizedBuffer(
"fn foo() -> Int {\n"
" // return 42;\n"
"}");
ParseTree tree = ParseTree::Parse(tokens, consumer);
EXPECT_FALSE(tree.HasErrors());
EXPECT_THAT(
tree,
MatchParseTreeNodes(
{MatchFunctionDeclaration(MatchDeclaredName("foo"), MatchParameters(),
MatchReturnType(MatchNameReference("Int")),
MatchCodeBlock(
// TODO: Match a return statement.
MatchCodeBlockEnd())),
MatchFileEnd()}));
}
TEST_F(ParseTreeTest, FunctionDeclarationWithSingleIdentifierParameterList) {
TokenizedBuffer tokens = GetTokenizedBuffer("fn foo(bar);");
ParseTree tree = ParseTree::Parse(tokens, consumer);