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author | Tom Willemse | 2021-02-08 17:42:18 -0800 |
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committer | Tom Willemse | 2021-02-08 17:42:18 -0800 |
commit | 0dbf155da52c5db1cab2688b04c87386a55c5d5b (patch) | |
tree | c76c0bc5b4364b7740ae071ee4c1ee7ad9c196e8 /src/com/craftinginterpreters/lox/Parser.java | |
parent | 4a71c219b5fa8e9e28af43925284f429092ba68e (diff) | |
download | crafting-interpreters-0dbf155da52c5db1cab2688b04c87386a55c5d5b.tar.gz crafting-interpreters-0dbf155da52c5db1cab2688b04c87386a55c5d5b.zip |
Add return statement
Diffstat (limited to 'src/com/craftinginterpreters/lox/Parser.java')
-rw-r--r-- | src/com/craftinginterpreters/lox/Parser.java | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/com/craftinginterpreters/lox/Parser.java b/src/com/craftinginterpreters/lox/Parser.java index c427bc4..528326c 100644 --- a/src/com/craftinginterpreters/lox/Parser.java +++ b/src/com/craftinginterpreters/lox/Parser.java @@ -52,6 +52,8 @@ class Parser { return ifStatement(); if (match(PRINT)) return printStatement(); + if (match(RETURN)) + return returnStatement(); if (match(WHILE)) return whileStatement(); if (match(LEFT_BRACE)) @@ -120,6 +122,17 @@ class Parser { return new Stmt.Print(value); } + private Stmt returnStatement() { + Token keyword = previous(); + Expr value = null; + if (!check(SEMICOLON)) { + value = expression(); + } + + consume(SEMICOLON, "Expect ';' after return value."); + return new Stmt.Return(keyword, value); + } + private Stmt varDeclaration() { Token name = consume(IDENTIFIER, "Expect variable name."); |