From 9c437f90327880a195f1090f726118a8f6742bc6 Mon Sep 17 00:00:00 2001
From: hryx <codroid@gmail.com>
Date: Sun, 26 May 2019 19:14:50 -0700
Subject: [PATCH] var decl: ImplicitCastExpr

---
 src-self-hosted/clang.zig       |  2 ++
 src-self-hosted/translate_c.zig | 36 ++++++++++++++++++++++++---------
 src/zig_clang.cpp               |  5 +++++
 src/zig_clang.h                 |  3 +++
 4 files changed, 37 insertions(+), 9 deletions(-)

diff --git a/src-self-hosted/clang.zig b/src-self-hosted/clang.zig
index 888d45999b7c8ee129646d09e238aac5722ad20b..e1b7c526b1361f346eb2e113d2a210f883c9cd7b 100644
--- a/src-self-hosted/clang.zig
+++ b/src-self-hosted/clang.zig
@@ -878,3 +878,5 @@ pub const ZigClangVarDecl_TLSKind = extern enum {
     Static,
     Dynamic,
 };
+
+pub extern fn ZigClangImplicitCastExpr_getCastKind(*const ZigClangImplicitCastExpr) ZigClangCK;
diff --git a/src-self-hosted/translate_c.zig b/src-self-hosted/translate_c.zig
index efdeaa3aff98e3858f623931b61b07574972c66a..50663537e291dabd3d63c8c460b51ccb66123e23 100644
--- a/src-self-hosted/translate_c.zig
+++ b/src-self-hosted/translate_c.zig
@@ -324,6 +324,7 @@ fn transStmt(
     switch (sc) {
         .CompoundStmtClass => return transCompoundStmt(rp, scope, @ptrCast(*const ZigClangCompoundStmt, stmt)),
         .DeclStmtClass => return transDeclStmt(rp, scope, @ptrCast(*const ZigClangDeclStmt, stmt)),
+        .ImplicitCastExprClass => return transImplicitCastExpr(rp, scope, @ptrCast(*const ZigClangImplicitCastExpr, stmt)),
         else => {
             return revertAndWarn(
                 rp,
@@ -409,7 +410,7 @@ fn transDeclStmt(rp: RestorePoint, parent_scope: *Scope, stmt: *const ZigClangDe
 
                 const eq_token = try appendToken(c, .Equal, "=");
                 const init_node = if (ZigClangVarDecl_getInit(var_decl)) |expr|
-                    (try transExpr(rp, scope, expr)).node
+                    (try transExpr(rp, scope, expr, .used, .r_value)).node
                 else
                     null;
                 const semicolon_token = try appendToken(c, .Semicolon, ";");
@@ -423,7 +424,7 @@ fn transDeclStmt(rp: RestorePoint, parent_scope: *Scope, stmt: *const ZigClangDe
                     .name_token = name_token,
                     .eq_token = eq_token,
                     .mut_token = mut_token,
-                    .comptime_token = null, // TODO IsConstexpr ?
+                    .comptime_token = null,
                     .extern_export_token = null, // TODO ?TokenIndex,
                     .lib_name = null, // TODO ?*Node,
                     .type_node = null, // TODO ?*Node,
@@ -452,13 +453,30 @@ fn transDeclStmt(rp: RestorePoint, parent_scope: *Scope, stmt: *const ZigClangDe
     };
 }
 
-fn transExpr(rp: RestorePoint, scope: *Scope, expr: *const ZigClangExpr) !TransResult {
-    return revertAndWarn(
-        rp,
-        error.UnsupportedTranslation,
-        ZigClangExpr_getBeginLoc(expr),
-        "TODO implement translation of Expr",
-    );
+fn transImplicitCastExpr(
+    rp: RestorePoint,
+    scope: *Scope,
+    expr: *const ZigClangImplicitCastExpr,
+) !TransResult {
+    switch (ZigClangImplicitCastExpr_getCastKind(@ptrCast(*const ZigClangImplicitCastExpr, expr))) {
+        else => |kind| return revertAndWarn(
+            rp,
+            error.UnsupportedTranslation,
+            ZigClangStmt_getBeginLoc(@ptrCast(*const ZigClangStmt, expr)),
+            "TODO implement translation of CastKind {}",
+            @tagName(kind),
+        ),
+    }
+}
+
+fn transExpr(
+    rp: RestorePoint,
+    scope: *Scope,
+    expr: *const ZigClangExpr,
+    used: ResultUsed,
+    lrvalue: LRValue,
+) TransError!TransResult {
+    return transStmt(rp, scope, @ptrCast(*const ZigClangStmt, expr), used, lrvalue);
 }
 
 fn findBlockScope(inner: *Scope) *Scope.Block {
diff --git a/src/zig_clang.cpp b/src/zig_clang.cpp
index 9b725710a95636c5afccc5992c34b143ca27fd8f..6077878b299971d265aa9f4eb99ff8ebfe36173f 100644
--- a/src/zig_clang.cpp
+++ b/src/zig_clang.cpp
@@ -1919,3 +1919,8 @@ const struct ZigClangStringLiteral *ZigClangPredefinedExpr_getFunctionName(
     const clang::StringLiteral *result = casted->getFunctionName();
     return reinterpret_cast<const struct ZigClangStringLiteral *>(result);
 }
+
+enum ZigClangCK ZigClangImplicitCastExpr_getCastKind(const struct ZigClangImplicitCastExpr *self) {
+    auto casted = reinterpret_cast<const clang::CastExpr *>(self);
+    return (ZigClangCK)casted->getCastKind();
+}
diff --git a/src/zig_clang.h b/src/zig_clang.h
index 1c71f2eb91d4d7162e7176d8247b0577439d69d2..d6d193223b36778b7b503b4cf83f09450356f6eb 100644
--- a/src/zig_clang.h
+++ b/src/zig_clang.h
@@ -869,4 +869,7 @@ ZIG_EXTERN_C const char *ZigClangStringLiteral_getString_bytes_begin_size(const
 
 ZIG_EXTERN_C const struct ZigClangStringLiteral *ZigClangPredefinedExpr_getFunctionName(
         const struct ZigClangPredefinedExpr *self);
+
+ZIG_EXTERN_C enum ZigClangCK ZigClangImplicitCastExpr_getCastKind(const struct ZigClangImplicitCastExpr *);
+
 #endif
-- 
2.54.0