Add Endor source reader before lexing with provenance and URI provider

crates/frontend/src/parser.rs

@@ -4,6 +4,17 @@ use crate::ast::{
 use crate::lexer::decode_string;
 use crate::{Diagnostic, DiagnosticKind, Span, Token, TokenKind, lex};
 
+/// Parse a reader snapshot, retaining its origin and resolved revision on error.
+pub fn parse_source(source: &crate::SourceUnit) -> Result<Program, crate::SourceDiagnostic> {
+    parse(source.text()).map_err(|error| source.annotate(error))
+}
+
+pub fn parse_source_expression(
+    source: &crate::SourceUnit,
+) -> Result<Expr, crate::SourceDiagnostic> {
+    parse_expression(source.text()).map_err(|error| source.annotate(error))
+}
+
 /// Parse one or more basic typed function declarations. This is a syntax
 /// operation: type names and name references are retained without resolution.
 pub fn parse(source: &str) -> Result<Program, Diagnostic> {