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authorAleksey Kladov <[email protected]>2018-01-07 07:55:43 +0000
committerAleksey Kladov <[email protected]>2018-01-07 07:55:43 +0000
commit8671a892c5169fe608d0467270a2af7797df8c36 (patch)
treeedc870b64c9357ec60474969083ce85959cf8c41
parent50132db4c676a7dac105dba7fa966edafaa1d209 (diff)
Error builder
-rw-r--r--src/tree/file_builder.rs29
1 files changed, 28 insertions, 1 deletions
diff --git a/src/tree/file_builder.rs b/src/tree/file_builder.rs
index 83aa4186f..a1b004892 100644
--- a/src/tree/file_builder.rs
+++ b/src/tree/file_builder.rs
@@ -5,6 +5,7 @@ pub trait Sink {
5 fn leaf(&mut self, kind: SyntaxKind, len: TextUnit); 5 fn leaf(&mut self, kind: SyntaxKind, len: TextUnit);
6 fn start_internal(&mut self, kind: SyntaxKind); 6 fn start_internal(&mut self, kind: SyntaxKind);
7 fn finish_internal(&mut self); 7 fn finish_internal(&mut self);
8 fn error(&mut self) -> ErrorBuilder;
8} 9}
9 10
10 11
@@ -52,6 +53,10 @@ impl Sink for FileBuilder {
52 self.add_len(id); 53 self.add_len(id);
53 } 54 }
54 } 55 }
56
57 fn error(&mut self) -> ErrorBuilder {
58 ErrorBuilder::new(self)
59 }
55} 60}
56 61
57impl FileBuilder { 62impl FileBuilder {
@@ -132,4 +137,26 @@ fn fill<T>(slot: &mut Option<T>, value: T) {
132fn grow(left: &mut TextRange, right: TextRange) { 137fn grow(left: &mut TextRange, right: TextRange) {
133 assert_eq!(left.end(), right.start()); 138 assert_eq!(left.end(), right.start());
134 *left = TextRange::from_to(left.start(), right.end()) 139 *left = TextRange::from_to(left.start(), right.end())
135} \ No newline at end of file 140}
141
142pub struct ErrorBuilder<'f> {
143 message: Option<String>,
144 builder: &'f mut FileBuilder
145}
146
147impl<'f> ErrorBuilder<'f> {
148 fn new(builder: &'f mut FileBuilder) -> Self {
149 ErrorBuilder { message: None, builder }
150 }
151
152 pub fn message<M: Into<String>>(mut self, m: M) -> Self {
153 self.message = Some(m.into());
154 self
155 }
156
157 pub fn build(self) {
158 let message = self.message.expect("Error message not set");
159 let node = self.builder.current_id();
160 self.builder.errors.push(SyntaxErrorData { node, message })
161 }
162}