Mercurial > projects > dang
view sema/TypeCheck.d @ 152:893f23a9de93
Formatting change
author | Anders Halager <halager@gmail.com> |
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date | Mon, 21 Jul 2008 21:30:44 +0200 |
parents | c3b24e7e8cf8 |
children | 57b0b4464a0b |
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module sema.TypeCheck; import sema.Visitor, sema.DType; import tango.io.Stdout; import basic.SourceLocation, basic.Message; class TypeCheck : Visitor!(void) { this(MessageHandler messages) { this.messages = messages; } override void visitBinaryExp(BinaryExp exp) { super.visitBinaryExp(exp); if(!(exp.left.type is exp.right.type)) { if (!exp.right.type.hasImplicitConversionTo(exp.left.type) && !exp.left.type.hasImplicitConversionTo(exp.right.type)) messages.report(InvalidImplicitCast, exp.loc) .arg(exp.right.type.toString) .arg(exp.left.type.toString); else { CastExp castExp; if(exp.left.type.isReal && exp.right.type.isReal) if(exp.left.type.byteSize > exp.right.type.byteSize) castExp = new CastExp( SLoc.Invalid, new Identifier(exp.left.type.name), exp.right); else castExp = new CastExp( SLoc.Invalid, new Identifier(exp.right.type.name), exp.left); else if(exp.left.type.isReal || exp.right.type.isReal) if(exp.left.type.isReal) castExp = new CastExp( SLoc.Invalid, new Identifier(exp.left.type.name), exp.right); else castExp = new CastExp( SLoc.Invalid, new Identifier(exp.right.type.name), exp.left); else if(exp.left.type.byteSize > exp.right.type.byteSize) castExp = new CastExp( SLoc.Invalid, new Identifier(exp.left.type.name), exp.right); else if(exp.left.type.byteSize > exp.right.type.byteSize) castExp = new CastExp( SLoc.Invalid, new Identifier(exp.right.type.name), exp.left); else castExp = new CastExp( SLoc.Invalid, new Identifier(exp.left.type.name), exp.right); if(castExp) { castExp.env = exp.env; if(castExp.exp == exp.right) exp.right = castExp; else exp.left = castExp; } } } } override void visitCallExp(CallExp exp) { super.visitCallExp(exp); Exp[] newArgs; foreach(i, arg; exp.args) { auto argType = (cast(DFunction)exp.exp.type).params[i]; auto expType = arg.type; if(argType.byteSize != expType.byteSize) { if(!expType.hasImplicitConversionTo(argType)) messages.report(InvalidImplicitCast, exp.loc) .arg(expType.toString) .arg(argType.toString); auto castExp = new CastExp( SLoc.Invalid, new Identifier(argType.name), arg); castExp.env = exp.exp.env; newArgs ~= castExp; } else newArgs ~= arg; } exp.args = newArgs; } override void visitAssignExp(AssignExp exp) { super.visitAssignExp(exp); auto identifierType = exp.identifier.type; auto expType = exp.exp.type; if(identifierType != expType) { if(!expType.hasImplicitConversionTo(identifierType)) messages.report(InvalidImplicitCast, exp.loc) .arg(expType.toString) .arg(identifierType.toString); auto castExp = new CastExp( SLoc.Invalid, new Identifier(identifierType.name), exp.exp); castExp.env = exp.exp.env; exp.exp = castExp; } } override void visitReturnStmt(ReturnStmt stmt) { super.visitReturnStmt(stmt); if(stmt.exp) { auto returnType = stmt.env.parentFunction.type.asFunction.returnType; auto expType = stmt.exp.type; if(returnType != expType) { if(!expType.hasImplicitConversionTo(returnType)) messages.report(InvalidImplicitCast, stmt.exp.loc) .arg(expType.toString) .arg(returnType.toString); auto castExp = new CastExp( SLoc.Invalid, new Identifier(returnType.name), stmt.exp); castExp.env = stmt.exp.env; stmt.exp = castExp; } } } override void visitVarDecl(VarDecl decl) { super.visitVarDecl(decl); if(decl.init) { auto varType = decl.type; auto expType = decl.init.type; if(varType.byteSize != expType.byteSize) { if(!expType.hasImplicitConversionTo(varType)) messages.report(InvalidImplicitCast, decl.init.loc) .arg(expType.toString) .arg(varType.toString); auto castExp = new CastExp( SLoc.Invalid, new Identifier(varType.name), decl.init); castExp.env = decl.init.env; decl.init = castExp; } } } MessageHandler messages; }