Added simple namespace inference during function resolution

Author: IsaacShelton

Diff for: .github/workflows/remoteBuild.yml

@@ -83,8 +83,8 @@ jobs:
         run: |
           cargo build --release --target x86_64-pc-windows-gnu
         env:
-          CFLAGS: -static-libstdc++
-          CXXFLAGS: -static-libstdc++
+          CFLAGS: -static-libgcc -static-libstdc++ -Wl,-Bstatic -lstdc++ -lpthread
+          CXXFLAGS: -static-libgcc -static-libstdc++ -Wl,-Bstatic -lstdc++ -lpthread
           LLVM_SYS_181_PREFIX: C:\msys64\mingw64
           zstd_DIR: C:\msys64\mingw64
           zstd_LIBRARY: C:\msys64\mingw64\lib\libzstd.a

Diff for: src/resolve/error.rs

@@ -1,3 +1,4 @@
+use super::function_search_ctx::FindFunctionError;
 use crate::{
     show::Show,
     source_files::{Source, SourceFiles},
@@ -30,6 +31,7 @@ pub enum ResolveErrorKind {
     },
     FailedToFindFunction {
         name: String,
+        reason: FindFunctionError,
     },
     UndeclaredVariable {
         name: String,
@@ -197,9 +199,12 @@ impl Display for ResolveErrorKind {
                     value
                 )?;
             }
-            ResolveErrorKind::FailedToFindFunction { name } => {
-                write!(f, "Failed to find function '{}'", name)?;
-            }
+            ResolveErrorKind::FailedToFindFunction { name, reason } => match reason {
+                FindFunctionError::NotDefined => write!(f, "Failed to find function '{}'", name)?,
+                FindFunctionError::Ambiguous => {
+                    write!(f, "Multiple possibilities for function '{}'", name)?
+                }
+            },
             ResolveErrorKind::UndeclaredVariable { name } => {
                 write!(f, "Undeclared variable '{}'", name)?;
             }

Diff for: src/resolve/expr/call.rs

@@ -1,7 +1,6 @@
 use super::{resolve_expr, PreferredType, ResolveExprCtx};
 use crate::{
     ast::{self, ConformBehavior},
-    name::ResolvedName,
     resolve::{
         conform::{conform_expr, to_default::conform_expr_to_default, ConformMode},
         error::{ResolveError, ResolveErrorKind},
@@ -23,24 +22,15 @@ pub fn resolve_call_expr(
         .at(source));
     }
 
-    eprintln!("warning: function call name resolution not fully implemented yet");
-    let resolved_name = if !call.function_name.namespace.is_empty() {
-        ResolvedName::Project(
-            format!(
-                "{}{}",
-                call.function_name.namespace, call.function_name.basename
-            )
-            .into_boxed_str(),
-        )
-    } else {
-        ResolvedName::Project(call.function_name.basename.clone().into_boxed_str())
-    };
-
-    let Some(function_ref) = ctx.function_search_ctx.find_function(&resolved_name) else {
-        return Err(ResolveErrorKind::FailedToFindFunction {
-            name: call.function_name.to_string(),
+    let function_ref = match ctx.function_search_ctx.find_function(&call.function_name) {
+        Ok(function_ref) => function_ref,
+        Err(reason) => {
+            return Err(ResolveErrorKind::FailedToFindFunction {
+                name: call.function_name.to_string(),
+                reason,
+            }
+            .at(source));
         }
-        .at(source));
     };
 
     let function = ctx.resolved_ast.functions.get(function_ref).unwrap();

Diff for: src/resolve/function_search_ctx.rs

@@ -1,22 +1,67 @@
-use crate::{name::ResolvedName, resolved};
+use crate::{
+    name::{Name, ResolvedName},
+    resolved,
+};
 use std::collections::HashMap;
 
 #[derive(Clone, Debug)]
 pub struct FunctionSearchCtx {
     pub available: HashMap<ResolvedName, Vec<resolved::FunctionRef>>,
+    pub imported_namespaces: Vec<Box<str>>,
+}
+
+#[derive(Clone, Debug)]
+pub enum FindFunctionError {
+    NotDefined,
+    Ambiguous,
 }
 
 impl FunctionSearchCtx {
     pub fn new() -> Self {
         Self {
             available: Default::default(),
+            // TODO: Make this value user-specified
+            imported_namespaces: vec!["io".to_string().into_boxed_str()],
         }
     }
 
-    pub fn find_function(&self, name: &ResolvedName) -> Option<resolved::FunctionRef> {
-        self.available
-            .get(name)
+    pub fn find_function(&self, name: &Name) -> Result<resolved::FunctionRef, FindFunctionError> {
+        eprintln!("warning: function call name resolution not fully implemented yet");
+
+        let resolved_name = if !name.namespace.is_empty() {
+            ResolvedName::Project(format!("{}{}", name.namespace, name.basename).into_boxed_str())
+        } else {
+            ResolvedName::Project(name.basename.clone().into_boxed_str())
+        };
+
+        if let Some(found) = self
+            .available
+            .get(&resolved_name)
             .and_then(|list| list.first())
             .copied()
+        {
+            return Ok(found);
+        }
+
+        if name.namespace.is_empty() {
+            let mut matches = self.imported_namespaces.iter().filter_map(|namespace| {
+                self.available
+                    .get(&ResolvedName::Project(
+                        format!("{}/{}", namespace, name.basename).into_boxed_str(),
+                    ))
+                    .and_then(|list| list.first())
+                    .copied()
+            });
+
+            if let Some(found) = matches.next() {
+                if matches.next().is_some() {
+                    return Err(FindFunctionError::Ambiguous);
+                } else {
+                    return Ok(found);
+                }
+            }
+        }
+
+        Err(FindFunctionError::NotDefined)
     }
 }