// hir.bux — HIR (High-level Intermediate Representation) node types
module Hir {

// HIR node kinds
const hLit: int = 0;
const hVar: int = 1;
const hSelf: int = 2;
const hUnary: int = 3;
const hBinary: int = 4;
const hAssign: int = 5;
const hIf: int = 6;
const hWhile: int = 7;
const hLoop: int = 8;
const hBreak: int = 9;
const hContinue: int = 10;
const hReturn: int = 11;
const hAlloca: int = 12;
const hLoad: int = 13;
const hStore: int = 14;
const hFieldPtr: int = 15;
const hArrowField: int = 16;
const hIndexPtr: int = 17;
const hCall: int = 18;
const hCallIndirect: int = 19;
const hCast: int = 20;
const hIs: int = 21;
const hSizeOf: int = 22;
const hBlock: int = 23;
const hStructInit: int = 24;
const hSliceInit: int = 25;
const hRange: int = 26;
const hTupleInit: int = 27;
const hMatch: int = 28;

// ---------------------------------------------------------------------------
// HirNode — unified struct with tagged union pattern
// ---------------------------------------------------------------------------

struct HirNode {
    kind: int,
    line: uint32,
    column: uint32,
    typeKind: int,
    typeName: String,
    // Common fields (used by multiple kinds)
    strValue: String,       // var name, callee name, field name, label
    intValue: int,          // token kind (for lit, unary op, binary op)
    boolValue: bool,        // range inclusive, isScope
    // Child nodes (up to 3)
    child1: *HirNode,       // left/operand/condition/base
    child2: *HirNode,       // right/value/then/body
    child3: *HirNode,       // else/third
    // Extra data pointer (for children arrays, field lists, etc.)
    extraData: *void,
    extraCount: int,
}

// ---------------------------------------------------------------------------
// HirFunc
// ---------------------------------------------------------------------------

struct HirParam {
    name: String,
    typeKind: int,
    typeName: String,
}

struct HirFunc {
    name: String,
    paramCount: int,
    param0: HirParam,
    param1: HirParam,
    param2: HirParam,
    param3: HirParam,
    param4: HirParam,
    param5: HirParam,
    retTypeKind: int,
    retTypeName: String,
    body: *HirNode,
    isPublic: bool,
}

// ---------------------------------------------------------------------------
// HirEnumVariant
// ---------------------------------------------------------------------------

struct HirEnumVariant {
    name: String,
    fieldCount: int,
    fieldType0: int,
    fieldName0: String,
    fieldType1: int,
    fieldName1: String,
}

// ---------------------------------------------------------------------------
// HirModule
// ---------------------------------------------------------------------------

struct HirModule {
    funcCount: int,
    funcs: *HirFunc,
    externCount: int,
    externFuncs: *HirFunc,
    structCount: int,
    enumCount: int,
}

// ---------------------------------------------------------------------------
// Constructor helpers
// ---------------------------------------------------------------------------

func Hir_MakeNode(kind: int, line: uint32, column: uint32) -> HirNode {
    return HirNode { kind: kind, line: line, column: column,
        typeKind: 0, typeName: "",
        strValue: "", intValue: 0, boolValue: false,
        child1: null as *HirNode, child2: null as *HirNode, child3: null as *HirNode,
        extraData: null as *void, extraCount: 0 };
}

func Hir_MakeLit(tokKind: int, tokText: String, line: uint32, col: uint32) -> HirNode {
    var n: HirNode = Hir_MakeNode(hLit, line, col);
    n.intValue = tokKind;
    n.strValue = tokText;
    return n;
}

func Hir_MakeVar(name: String, line: uint32, col: uint32) -> HirNode {
    var n: HirNode = Hir_MakeNode(hVar, line, col);
    n.strValue = name;
    return n;
}

func Hir_MakeBinary(op: int, left: *HirNode, right: *HirNode, line: uint32, col: uint32) -> HirNode {
    var n: HirNode = Hir_MakeNode(hBinary, line, col);
    n.intValue = op;
    n.child1 = left;
    n.child2 = right;
    return n;
}

func Hir_MakeCall(callee: String, line: uint32, col: uint32) -> HirNode {
    var n: HirNode = Hir_MakeNode(hCall, line, col);
    n.strValue = callee;
    return n;
}

func Hir_MakeReturn(value: *HirNode, line: uint32, col: uint32) -> HirNode {
    var n: HirNode = Hir_MakeNode(hReturn, line, col);
    n.child1 = value;
    return n;
}

func Hir_MakeBlock(line: uint32, col: uint32) -> HirNode {
    return Hir_MakeNode(hBlock, line, col);
}

func Hir_MakeIf(cond: *HirNode, thenBody: *HirNode, elseBody: *HirNode, line: uint32, col: uint32) -> HirNode {
    var n: HirNode = Hir_MakeNode(hIf, line, col);
    n.child1 = cond;
    n.child2 = thenBody;
    n.child3 = elseBody;
    return n;
}

func Hir_MakeWhile(cond: *HirNode, body: *HirNode, line: uint32, col: uint32) -> HirNode {
    var n: HirNode = Hir_MakeNode(hWhile, line, col);
    n.child1 = cond;
    n.child2 = body;
    return n;
}

func Hir_MakeAlloca(name: String, line: uint32, col: uint32) -> HirNode {
    var n: HirNode = Hir_MakeNode(hAlloca, line, col);
    n.strValue = name;
    return n;
}

func Hir_MakeLoad(ptr: *HirNode, line: uint32, col: uint32) -> HirNode {
    var n: HirNode = Hir_MakeNode(hLoad, line, col);
    n.child1 = ptr;
    return n;
}

func Hir_MakeStore(ptr: *HirNode, value: *HirNode, line: uint32, col: uint32) -> HirNode {
    var n: HirNode = Hir_MakeNode(hStore, line, col);
    n.child1 = ptr;
    n.child2 = value;
    return n;
}