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-rw-r--r--src/com/craftinginterpreters/lox/Parser.java22
1 files changed, 22 insertions, 0 deletions
diff --git a/src/com/craftinginterpreters/lox/Parser.java b/src/com/craftinginterpreters/lox/Parser.java
index 528326c..fe51e45 100644
--- a/src/com/craftinginterpreters/lox/Parser.java
+++ b/src/com/craftinginterpreters/lox/Parser.java
@@ -33,6 +33,8 @@ class Parser {
private Stmt declaration() {
try {
+ if (match(CLASS))
+ return classDeclaration();
if (match(FUN))
return function("function");
if (match(VAR))
@@ -45,6 +47,20 @@ class Parser {
}
}
+ private Stmt classDeclaration() {
+ Token name = consume(IDENTIFIER, "Expect class name.");
+ consume(LEFT_BRACE, "Expect '{' before class body.");
+
+ List<Stmt.Function> methods = new ArrayList<>();
+ while (!check(RIGHT_BRACE) && !isAtEnd()) {
+ methods.add(function("method"));
+ }
+
+ consume(RIGHT_BRACE, "Expect '}' after class body.");
+
+ return new Stmt.Class(name, methods);
+ }
+
private Stmt statement() {
if (match(FOR))
return forStatement();
@@ -201,6 +217,9 @@ class Parser {
if (expr instanceof Expr.Variable) {
Token name = ((Expr.Variable) expr).name;
return new Expr.Assign(name, value);
+ } else if (expr instanceof Expr.Get) {
+ Expr.Get get = (Expr.Get)expr;
+ return new Expr.Set(get.object, get.name, value);
}
error(equals, "Invalid assignment target.");
@@ -313,6 +332,9 @@ class Parser {
while (true) {
if (match(LEFT_PAREN)) {
expr = finishCall(expr);
+ } else if (match(DOT)) {
+ Token name = consume(IDENTIFIER, "Expect property name after '.'");
+ expr = new Expr.Get(expr, name);
} else {
break;
}