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Цепочка вызовов функций

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Victor 2016-07-31 14:09:23 +03:00
parent 06fe09ce98
commit 5f71e9a9be
1 changed files with 22 additions and 5 deletions
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27
src/main/java/com/annimon/ownlang/parser/Parser.java
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@ -159,7 +159,7 @@ public final class Parser {
return new ExprStatement(match());
}
if (lookMatch(0, TokenType.WORD) && lookMatch(1, TokenType.LPAREN)) {
return new ExprStatement(function(qualifiedName()));
return new ExprStatement(functionChain(qualifiedName()));
}
return assignmentStatement();
}
@ -297,6 +297,23 @@ public final class Parser {
return statementOrBlock();
}
private Expression functionChain(Expression qualifiedNameExpr) {
// f1().f2().f3() || f1().key
final Expression expr = function(qualifiedNameExpr);
if (lookMatch(0, TokenType.DOT)) {
final List<Expression> indices = variableSuffix();
if (indices == null | indices.isEmpty()) return expr;
if (lookMatch(0, TokenType.LPAREN)) {
// next function call
return functionChain(new ContainerAccessExpression(expr, indices));
}
// container access
return new ContainerAccessExpression(expr, indices);
}
return expr;
}
private FunctionalExpression function(Expression qualifiedNameExpr) {
// function(arg1, arg2, ...)
consume(TokenType.LPAREN);
@ -684,18 +701,18 @@ public final class Parser {
}
return variable();
}
private Expression variable() {
// function(...
if (lookMatch(0, TokenType.WORD) && lookMatch(1, TokenType.LPAREN)) {
return function(new ValueExpression(consume(TokenType.WORD).getText()));
return functionChain(new ValueExpression(consume(TokenType.WORD).getText()));
}
final Expression qualifiedNameExpr = qualifiedName();
if (qualifiedNameExpr != null) {
// variable(args) || arr["key"](args) || obj.key(args)
if (lookMatch(0, TokenType.LPAREN)) {
return function(qualifiedNameExpr);
return functionChain(qualifiedNameExpr);
}
// postfix increment/decrement
if (match(TokenType.PLUSPLUS)) {
@ -727,7 +744,7 @@ public final class Parser {
}
return new ContainerAccessExpression(current.getText(), indices);
}
private List<Expression> variableSuffix() {
// .key1.arr1[expr1][expr2].key2
if (!lookMatch(0, TokenType.DOT) && !lookMatch(0, TokenType.LBRACKET)) {