first commit

src/grammar/mod.rs

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+use crate::ir::{Atom, OwnedAtom};
+pub(crate) mod parser;
+
+#[derive(PartialEq, Debug)]
+struct Module {
+    objs: Vec<(String, Region)>,
+}
+
+/// A region of memory.
+/// Either a structured field list or an atomic type.
+#[derive(PartialEq, Debug)]
+enum Region {
+    Fields(Vec<(Range, FieldRegion)>),
+    Atom { ty: Type },
+}
+
+/// Content of a field.
+/// Can be a region or a constant.
+#[derive(PartialEq, Debug)]
+enum FieldRegion {
+    Subfield { name: String, content: Region },
+    Const { name: String, value: OwnedAtom },
+}
+
+#[derive(PartialEq, Debug)]
+pub(crate) enum Type {
+    Bool,
+    // unsigned numbers
+    U8,
+    U16,
+    U32,
+    U64,
+    U128,
+    UX(usize),
+    // signed numbers
+    I8,
+    I16,
+    I32,
+    I64,
+    I128,
+    IX(usize),
+    // float
+    F32,
+    F64,
+    // strings
+    Utf8,
+}
+
+/// position of field relative to parent
+type Range = (usize, usize);