From f2787ed9b40deabbbc9cbe2a6d38cafd1436fc6f Mon Sep 17 00:00:00 2001 From: Michael Williamson Date: Sat, 19 Aug 2023 10:42:44 +0100 Subject: Parse while loops --- .../java/org/shedlang/compiler/parser/Parser.java | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'src/main/java/org/shedlang/compiler/parser') diff --git a/src/main/java/org/shedlang/compiler/parser/Parser.java b/src/main/java/org/shedlang/compiler/parser/Parser.java index 9bf95612..a5a48756 100644 --- a/src/main/java/org/shedlang/compiler/parser/Parser.java +++ b/src/main/java/org/shedlang/compiler/parser/Parser.java @@ -315,6 +315,9 @@ public class Parser { case KEYWORD_VAR -> parseVar(tokens); + case KEYWORD_WHILE -> + parseWhile(tokens); + default -> parseExpressionStatement(tokens); }; @@ -601,4 +604,22 @@ public class Parser { return new UntypedVarNode(target, expression, source); } + + private static UntypedFunctionStatementNode parseWhile( + TokenIterator tokens + ) { + var start = tokens.position(); + + tokens.skip(TokenType.KEYWORD_WHILE); + tokens.skip(TokenType.SYMBOL_PAREN_OPEN); + var condition = parseTopLevelExpression(tokens); + tokens.skip(TokenType.SYMBOL_PAREN_CLOSE); + + var body = parseBlock(tokens); + + var end = tokens.position(); + var source = start.to(end); + + return new UntypedWhileNode(condition, body, source); + } } -- cgit v1.2.3