func (b *Builder) ParseMethodCallOrMapLookup(ctx *builderCtx, invocant node.Node) node.Node {
// We have already seen identifier followed by a period
symbol := b.NextNonSpace(ctx)
if symbol.Type() != ItemIdentifier {
b.Unexpected(ctx, "Expected identifier for method call or map lookup, got %s", symbol.Type())
}
var n node.Node
next := b.NextNonSpace(ctx)
if next.Type() != ItemOpenParen {
// it's a map lookup. Put back that extra token we read
b.Backup(ctx)
n = node.NewFetchFieldNode(invocant.Pos(), invocant, symbol.Value())
} else {
// It's a method call! Parse the list
args := b.ParseList(ctx)
closeParen := b.NextNonSpace(ctx)
if closeParen.Type() != ItemCloseParen {
b.Unexpected(ctx, "Expected ')', got %s", closeParen.Type())
}
n = node.NewMethodCallNode(invocant.Pos(), invocant, symbol.Value(), args.(*node.ListNode))
}
// If we are followed by another period, we are going to have to
// check for another level of methodcall / lookup
if b.PeekNonSpace(ctx).Type() == ItemPeriod {
b.NextNonSpace(ctx) // consume period
return b.ParseMethodCallOrMapLookup(ctx, n)
}
return n
}
func (b *Builder) ParseFunCall(ctx *builderCtx, invocant node.Node) node.Node {
next := b.NextNonSpace(ctx)
if next.Type() != ItemOpenParen {
b.Unexpected(ctx, "Expected '(', got %s", next.Type())
}
args := b.ParseList(ctx)
closeParen := b.NextNonSpace(ctx)
if closeParen.Type() != ItemCloseParen {
b.Unexpected(ctx, "Expected ')', got %s", closeParen.Type())
}
return node.NewFunCallNode(invocant.Pos(), invocant, args.(*node.ListNode))
}