Identifiers work!

1 files changed, 56 insertions, 9 deletions

diff --git a/src/parser.rs b/src/parser.rs
index 297230c..5f53557 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -274,7 +274,7 @@ impl Parser {
                 SymbolType::StartFlat => {
                     let subtb = self.parse_tag_body( ctx )?;
                     if subtb.is_name(&SymbolType::Output) {
-                        outputs.push(subtb.build_output(ctx)?);
+                        outputs.push(subtb.build_output()?);
                     } else {
                         children.push(subtb.build()?);
                     }
@@ -437,16 +437,43 @@ impl Parser {
             }
             match ctx.cur().unwrap().symbol() {
                 SymbolType::Literal(s) => {
-                    tb.add_param( s.to_string() );
+                    tb.add_param( ParamValue::Literal(s.to_string()) );
+                    ctx.next();
+                }
+                SymbolType::Token(_) => {
+                    if ctx.peek().is("tag data", |s| *s == SymbolType::Equals)? {
+                        break;
+                    }
+                    tb.add_param( self.parse_identifier( ctx )? );
                 }
                 _ => {
                     break;
                 }
             }
-            ctx.next();
         }
         Ok(())
     }
+
+    fn parse_identifier(&self, ctx: &mut Context ) -> ParseResult<ParamValue> {
+        let mut id = Identifier::new();
+
+        loop {
+            if ctx.cur().is("identifier",|s| matches!( s, SymbolType::Token(_) ))? {
+                if let SymbolType::Token(s) = ctx.cur().unwrap().symbol() {
+                    id.push( IdentifierValue::Name(s.to_string()) );
+                }
+            } else {
+                return Err(ParseError::new( ctx.cur().unwrap().start().clone(), &format!("Expeceted identifier, found {:?}", ctx.cur().unwrap().symbol() ) ) );
+            }
+
+            if !ctx.next().is("identifier seperator",|s| *s == SymbolType::Period )? {
+                break;
+            }
+            ctx.next();
+        }
+
+        Ok(ParamValue::Identifier(id))
+    }
     
     fn parse_tag_props(&self, ctx: &mut Context, tb: &mut TagBuilder ) -> ParseResult<()> {
         loop {
@@ -483,13 +510,18 @@ enum TagType {
 
 struct TagBuilder<'a> {
     name: Option<Symbol<'a>>,
-    params: Vec<String>,
+    params: Vec<ParamValue>,
     props: Properties,
     children: Vec<Token>,
     tag_type: TagType,
     start_pos: Position,
 }
 
+enum ParamValue {
+    Literal(String),
+    Identifier(Identifier),
+}
+
 impl<'a> TagBuilder<'a> {
     pub fn new(start: &Symbol) -> TagBuilder<'a> {
         TagBuilder {
@@ -538,7 +570,7 @@ impl<'a> TagBuilder<'a> {
         self.name = Some(name);
     }
 
-    pub fn add_param(&mut self, param: String) {
+    pub fn add_param(&mut self, param: ParamValue) {
         self.params.push( param );
     }
 
@@ -565,8 +597,13 @@ impl<'a> TagBuilder<'a> {
     pub fn build_view(mut self, ctx: &Context, outputs: Vec<Output>) -> ParseResult<View> {
         if let Some(sym) = self.name {
             if *sym.symbol() == SymbolType::View {
+                let name = if let ParamValue::Literal(s) = self.params.swap_remove(0) {
+                    s.to_string()
+                } else {
+                    return Err(ParseError::new(Position::none(), "Expected string literal for view name."));
+                };
                 Ok(View {
-                    name: self.params.swap_remove(0),
+                    name: name,
                     source: ctx.source(),
                     outputs: outputs,
                     //theme: Option<String>
@@ -580,11 +617,16 @@ impl<'a> TagBuilder<'a> {
         }
     }
 
-    pub fn build_output(mut self, ctx: &Context) -> ParseResult<Output> {
+    pub fn build_output(mut self) -> ParseResult<Output> {
         if let Some(sym) = self.name {
             if *sym.symbol() == SymbolType::Output {
+                let name = if let ParamValue::Literal(s) = self.params.swap_remove(0) {
+                    s.to_string()
+                } else {
+                    return Err(ParseError::new(Position::none(), "Expected string literal for output name."));
+                };
                 Ok(Output {
-                    name: self.params.swap_remove(0),
+                    name: name,
                     code: self.children,
                 })
             } else {
@@ -599,7 +641,12 @@ impl<'a> TagBuilder<'a> {
         if let Some(sym) = self.name {
             match sym.symbol() {
                 SymbolType::Show => {
-                    Ok(Token::Show(self.params.swap_remove(0), self.props))
+                    let id = if let ParamValue::Identifier(id) = self.params.swap_remove(0) {
+                        id
+                    } else {
+                        return Err(ParseError::new(Position::none(), "Identifier for show variable name."));
+                    };
+                    Ok(Token::Show(id, self.props))
                 }
                 _ => {
                     Err(ParseError {