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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/Interpreter.java | |
parent | 4a71c219b5fa8e9e28af43925284f429092ba68e (diff) | |
download | crafting-interpreters-0dbf155da52c5db1cab2688b04c87386a55c5d5b.tar.gz crafting-interpreters-0dbf155da52c5db1cab2688b04c87386a55c5d5b.zip |
Add return statement
Diffstat (limited to 'src/com/craftinginterpreters/lox/Interpreter.java')
-rw-r--r-- | src/com/craftinginterpreters/lox/Interpreter.java | 31 |
1 files changed, 22 insertions, 9 deletions
diff --git a/src/com/craftinginterpreters/lox/Interpreter.java b/src/com/craftinginterpreters/lox/Interpreter.java index 407c537..4549e11 100644 --- a/src/com/craftinginterpreters/lox/Interpreter.java +++ b/src/com/craftinginterpreters/lox/Interpreter.java @@ -9,17 +9,21 @@ class Interpreter implements Expr.Visitor<Object>, Stmt.Visitor<Void> { Interpreter() { globals.define("clock", new LoxCallable() { - @Override - public int arity() { return 0; } + @Override + public int arity() { + return 0; + } - @Override - public Object call(Interpreter interpreter, List<Object> arguments) { - return (double)System.currentTimeMillis() / 1000.0; - } + @Override + public Object call(Interpreter interpreter, List<Object> arguments) { + return (double) System.currentTimeMillis() / 1000.0; + } - @Override - public String toString() { return "<native fn>"; } - }); + @Override + public String toString() { + return "<native fn>"; + } + }); } @Override @@ -173,6 +177,15 @@ class Interpreter implements Expr.Visitor<Object>, Stmt.Visitor<Void> { } @Override + public Void visitReturnStmt(Stmt.Return stmt) { + Object value = null; + if (stmt.value != null) + value = evaluate(stmt.value); + + throw new Return(value); + } + + @Override public Void visitVarStmt(Stmt.Var stmt) { Object value = null; if (stmt.initializer != null) { |